Category: Alloy Support

Filler metal details and selection

Common 70 Series Stick Electrodes: 7014 vs 7018 vs 7024

The E7014, E7018, and E7024 stick electrodes are all part of the AWS E70XX family, meaning they are designed to produce welds with approximately 70,000 PSI tensile strength. While they share similar strength ratings, they behave very differently in arc characteristics, penetration, slag control, deposition rate, position capability, and ideal applications.

Choosing the wrong rod often causes unnecessary grinding, poor fusion, slag inclusions, excessive spatter, difficult starts, or failed weld inspections. Understanding where each rod performs best helps reduce rework and improves weld consistency.

Key Takeaways

E7014 is a general-purpose drag rod with easy arc control and moderate penetration.
E7018 is a low-hydrogen structural electrode commonly used for critical welds and code work.
E7024 is a high-deposition flat and horizontal rod designed for production welding.
7018 requires dry storage and proper handling to maintain low-hydrogen properties.
7024 is often called a “jet rod” because of its high fill rate and fast travel speed.
7014 is frequently chosen for repair work, hobby fabrication, and thinner mild steel.

What the Electrode Numbers Mean

AWS SMAW electrode numbers provide basic classification information:

70 = 70,000 PSI tensile strength
1 = All-position capability
2 = Flat and horizontal only
4 or 8 = Flux coating and current characteristics

The final digit significantly changes how the rod welds, including penetration profile, slag behavior, deposition rate, and preferred polarity.

7014 Stick Electrode Overview

E7014 is a rutile iron-powder electrode known for smooth arc starts, easy slag release, and forgiving handling. It is commonly used for general fabrication, repair work, and light structural welding on clean mild steel.

What 7014 Is Good For

General fabrication
Farm equipment repair
Beginner-friendly stick welding
Sheet metal and lighter sections
Short welds and intermittent welding
Home shop projects

7014 Characteristics

Feature	7014 Behavior
Penetration	Moderate
Arc Stability	Smooth and forgiving
Slag Removal	Usually easy
Position Capability	All position
Deposition Rate	Moderate
Preferred Users	General repair and fabrication

7014 performs best on clean material. Rust, oil, paint, and mill scale can still cause porosity and inconsistent arc behavior.

7018 Stick Electrode Overview

E7018 is a low-hydrogen iron-powder electrode designed for structural welding, pressure applications, and critical fabrication where crack resistance matters. It is one of the most commonly specified stick electrodes in structural steel work.

What 7018 Is Good For

Structural steel
Code welding
Pressure vessel fabrication
Trailer fabrication
Heavy equipment repair
Critical joints requiring crack resistance

7018 Characteristics

Feature	7018 Behavior
Penetration	Moderate to deep
Arc Stability	Very smooth
Slag Removal	Usually peels easily
Position Capability	All position
Deposition Rate	Moderate to high
Main Advantage	Low hydrogen and strong weld quality

Important 7018 Storage Notes

7018 electrodes absorb moisture rapidly once exposed to air. Excess moisture can introduce hydrogen into the weld and increase cracking risk.

Store in a rod oven when required by procedure
Keep sealed until use
Discard rods showing damaged flux or moisture exposure
Follow manufacturer rebake procedures if applicable

Improperly stored 7018 rods frequently cause porosity, worm tracking, unstable arc starts, and hydrogen cracking.

7024 Stick Electrode Overview

E7024 is a high iron-powder electrode designed primarily for flat and horizontal welding. It produces a very high deposition rate and is commonly used for production welding where speed matters more than positional versatility.

What 7024 Is Good For

Production fabrication
Long flat welds
Fillet welds on thick material
Heavy plate fabrication
Fast fill passes
Shop welding environments

7024 Characteristics

Feature	7024 Behavior
Penetration	Shallow to moderate
Arc Stability	Very smooth
Slag Removal	Heavy slag system
Position Capability	Flat and horizontal only
Deposition Rate	Very high
Main Advantage	Fast welding speed

7024 is commonly called a drag rod because operators often drag the flux coating directly on the workpiece during welding.

7014 vs 7018 vs 7024 Comparison

Electrode	Best Use	Penetration	Position	Main Advantage	Main Limitation
7014	General repair and fabrication	Moderate	All position	Easy to use	Not ideal for critical structural work
7018	Structural and critical welds	Moderate to deep	All position	Low hydrogen strength	Requires dry storage
7024	Production flat welding	Shallow to moderate	Flat/horizontal only	Very fast deposition	Limited position capability

Common Wrong-Rod Mistakes

Using 7024 for vertical welds
Using moisture-contaminated 7018 rods
Assuming all “70 series” rods weld similarly
Using 7014 on dirty or heavily rusted material without prep
Choosing 7024 where deeper penetration is required
Using 7018 without sufficient amperage for stable arc performance

Visual Weld Characteristics

Electrode	Typical Bead Appearance	Slag Profile	Spatter Level
7014	Smooth and uniform	Medium slag	Low to moderate
7018	Dense and smooth	Heavy but clean peeling slag	Low
7024	Wide high-fill bead	Heavy slag coverage	Very low

What Usually Wears Out First

In stick welding systems, poor weld quality is often related to worn support components rather than the electrode itself.

Loose electrode holders
Damaged stinger jaws
Overheated cable connections
Cracked work clamps
Excessively worn welding leads
Poor grounding connections

Voltage drop from damaged leads or weak grounding can make 7018 especially difficult to run consistently.

Inspection and Test Steps

Verify correct polarity for the electrode type
Inspect rod coating for cracks or moisture damage
Check amperage against rod diameter recommendations
Confirm clean grounding surfaces
Inspect weld bead for undercut, porosity, or slag inclusions
Chip and brush between passes when using heavy slag electrodes

Safety Notes

Always use proper ventilation during SMAW welding
Wear approved welding PPE and eye protection
Inspect electrode holders and leads before welding
Remove flammable materials from the work area
Follow AWS and OSHA electrical safety practices

FAQ

Which rod is easiest for beginners?

7014 is generally easier for beginners because it has a forgiving arc and smooth slag release.

Why is 7018 considered stronger?

7018 provides low-hydrogen weld deposits with excellent mechanical properties and crack resistance for structural applications.

Can 7024 be used vertically?

No. Standard 7024 electrodes are intended for flat and horizontal welding only.

Does 7014 require a rod oven?

Typically no, but rods should still be stored dry and protected from moisture contamination.

Next Step

Before selecting a stick electrode, verify material thickness, weld position, service requirements, penetration needs, and whether low-hydrogen performance is required. Choosing the correct rod for the application reduces rework, improves weld quality, and minimizes weld failures in the field.

Sources Checked

AWS A5.1 Carbon Steel Electrodes Specification
Lincoln Electric SMAW Electrode Selection Guides
Miller Electric SMAW Electrode Reference Material
ESAB Stick Electrode Product Data
OSHA Welding Safety Guidance

May 24, 2026

6011 Rod Penetration Problems Troubleshooting: Polarity, Amperage, Arc Length, and Technique Fixes

6011 rod penetration problems usually come from low amperage, wrong polarity, weak AC output, long arc length, poor work lead connection, fast travel speed, electrode diameter mismatch, or poor joint preparation. E6011 is designed as a deep-penetrating, fast-freeze stick electrode, so if it is only laying metal on top, the first checks are current, polarity, arc force, work clamp condition, rod size, and whether the arc is actually digging into the joint root.

Do not correct poor penetration by weaving wider or piling on more weld metal. A wider bead can hide lack of fusion at the root and sidewalls. For repair work, grind or gouge out the suspect weld, clean the joint, verify rod size and amperage range, run the electrode on the correct current type, hold a tight arc, and use a controlled whip-and-pause or stringer technique suited to the position.

Common Symptoms

Symptom	Likely Cause	First Check
Bead sits high with little tie-in	Low amperage, long arc, or travel too fast	Increase amperage within rod range and shorten arc
Root does not open or keyhole	Insufficient heat, poor fit-up, or wrong electrode angle	Check root gap, land, and rod angle
Arc keeps snuffing out on AC	Low open-circuit voltage or poor connection	Verify machine capability and clean work clamp point
Lots of spatter but no digging arc	Long arc length or unstable current	Hold arc close and check leads
Burn-through on thin material	Too much amperage or rod too large	Drop rod size or use lower amperage
Good penetration on DC but weak on AC	AC machine output or rod condition issue	Try DC+ if available and verify dry electrodes

Root Cause Analysis

E6011 is a high-cellulose electrode intended for forceful arc action and all-position welding. It can run on AC or DC reverse polarity, but the machine, lead condition, rod condition, and operator technique still determine penetration. If amperage is too low, arc length too long, or the work return is poor, the rod loses its digging action and the weld bead washes over the surface instead of fusing into the joint.

For 6011 work, the arc should be controlled close to the puddle and directed into the joint. Internal stick-welding problems often overlap with general arc-control issues, so compare the setup against 6011 rod AC vs DC best practices and stick welding arc control guidance when the bead shape, travel speed, and amperage response do not match the rod size.

Quick Checks Before Changing Rods

Verify the electrode is E6011, not E6013, E7014, or another mild-steel rod with a different penetration profile.
Check the rod diameter against base metal thickness and joint opening.
Confirm polarity. E6011 is commonly used on AC or DC electrode positive, but verify the rod manufacturer’s label.
Clean the work clamp area to bright metal and move the clamp closer to the weld.
Inspect electrode holder jaws, lead lugs, cable damage, and loose connections.
Hold a short arc. A long arc creates spatter and reduces control at the root.
Use stringers or controlled whip-and-pause, not a wide cover weave to force penetration.
Run a test bead on matching scrap before rewelding the part.

Main Causes of Poor 6011 Penetration

Cause	What Happens	Correction
Amperage too low	Arc does not dig; bead rides high	Increase within published range
Wrong polarity	Arc force and penetration change	Use rod-label polarity; test DC+ where allowed
Weak AC output	Arc starts poorly or keeps going out	Use suitable AC machine or DC output if available
Arc too long	Spatter increases and heat spreads away from root	Hold tight arc, roughly near rod-core diameter
Travel too fast	Puddle does not dwell long enough to fuse	Slow down and watch root/sidewall tie-in
Rod too small	Not enough current capacity for joint thickness	Use correct diameter or multipass prep
Rod too large	Hard to control on thin work; burns through	Drop diameter and amperage
Poor joint prep	Arc cannot reach the root or sidewalls	Bevel, gap, clean, and fit the joint correctly

Inspection Steps

Look for a bead that is tall, ropey, or sitting on top of mill scale rather than tying into both sides.
Inspect the backside of open-root practice coupons where possible. Lack of root fusion means technique or setup needs correction.
Check whether slag is trapped ahead of the puddle. Slag in the leading edge can block fusion.
Check rod starts and restarts. Cold starts often show weak penetration before the puddle is established.
Inspect the work clamp and lead connections for heat discoloration, looseness, rust, paint, or undersized cable.
Break, bend, cut, or etch practice coupons where allowed to confirm penetration instead of judging surface appearance only.

Test Procedures

Test	Procedure	What It Tells You
Polarity comparison	Run the same rod on AC and DC+ where allowed	Shows whether the machine/current choice is limiting penetration
Amperage ladder	Run beads from low to high within rod range	Shows the point where arc force and tie-in improve
Arc-length test	Compare tight arc to long arc on scrap	Long arc usually increases spatter and weakens root control
Travel-speed test	Run slow, normal, and fast stringers	Fast travel commonly leaves poor sidewall fusion
Work-lead test	Move clamp to clean metal near weld	Improvement points to poor return path
Cut-and-etch check	Section a practice bead or fillet where allowed	Confirms actual root and sidewall penetration

Visual Wear and Setup Indicators

Rod sticks repeatedly even after amperage is increased slightly.
Electrode holder jaws are burned, loose, dirty, or do not grip the rod tightly.
Work clamp is attached to paint, rust, table slats, or far from the weld.
Arc changes sound when the lead is moved.
Rod coating is damaged, damp, broken, or flaking.
Weld bead has undercut from excessive current or long arc, but still lacks root fusion.
Slag is trapped at the toe or root because the puddle is not being controlled.

Compatibility Notes

E6011 compatibility depends on the welder output, current type, open-circuit voltage, electrode diameter, base metal thickness, and joint design. A small AC buzz box may run 6011 differently than a DC inverter with arc-force control. Some inverters run cellulosic electrodes better than others. If the arc is weak, unstable, or hard to restart, verify the machine manual for E6011 or cellulose-electrode support before blaming the rod.

Do not use 6011 as a substitute for a qualified structural, pressure, or code procedure unless the WPS allows it. For final passes requiring low hydrogen, impact requirements, or specific strength, verify whether 7018, 8018, or another rod is required after the root or repair pass.

What To Verify Before Ordering

Electrode classification: E6011, AWS A5.1 where required.
Rod diameter: 3/32 in, 1/8 in, 5/32 in, or other size.
Current type and polarity allowed by the rod manufacturer.
Welder output range and whether the machine supports cellulose electrodes well.
Base metal type, thickness, coating, and cleanliness.
Joint type: fillet, lap, butt, open root, patch, pipe, frame, or repair groove.
Position: flat, horizontal, vertical-up, vertical-down, or overhead.
Inspection requirement: visual only, bend, macroetch, code, customer, or WPS.
Whether follow-up fill/cap passes require a different electrode.

Common Wrong-Part Mistakes

Buying 6013 when deep penetration was expected from 6011.
Using 5/32 in rods on a machine that cannot supply stable current for that size.
Using 3/32 in rods on thick plate without proper bevel, gap, or multipass plan.
Running damp or damaged rods and blaming the machine.
Assuming AC and DC+ will behave the same on every welder.
Using 6011 for a final code weld when the procedure requires low-hydrogen electrodes.
Trying to overcome poor joint prep with extra amperage.

Field Fix vs Proper Fix

A field fix is to clean the clamp point, tighten the leads, switch to the correct polarity, increase amperage within the rod range, shorten the arc, slow travel, and run a test coupon. If penetration improves on scrap, correct the joint prep and repeat the weld on the part only if the repair requirement allows it.

The proper fix is to remove the defective weld, prepare the joint so the arc can reach the root, verify rod classification and diameter, set current from the electrode manufacturer range, confirm machine output, and weld with the technique required for the joint and position. For critical work, confirm penetration by the required inspection method before accepting the repair.

Related Failure Paths

6011 penetration problems connect to lack of fusion, cold lap, slag inclusion, excessive spatter, arc blow, rod sticking, burn-through, undercut, poor root opening, poor work return, and wrong electrode selection. Correct the electrical circuit, joint prep, rod size, and arc control before deciding the electrode itself is bad.

Safety Notes

Do not leave suspected lack of penetration in structural, lifting, pressure, trailer, frame, or safety-critical welds without inspection approval.
Wear welding helmet, gloves, jacket, eye protection, and respiratory protection suitable for the coating and base metal.
Remove paint, oil, solvents, galvanizing, and unknown coatings safely before welding.
Use ventilation. Cellulosic stick welding produces fumes and spatter.
Do not weld on closed containers, fuel tanks, or unknown vessels without proper cleaning and hot-work controls.
Disconnect power before servicing holders, cables, or machine terminals.

Sources Checked

Checked 6011, 6010, mild-steel electrode, polarity, arc length, amperage, joint prep, and stick welding technique references. Exact amperage and repair acceptance remain Unknown (Verify) until rod brand, diameter, machine output, base metal thickness, joint design, position, and WPS or inspection requirement are confirmed.

May 21, 2026

Washington Alloy THF-700HT-173 Hard Face Flux-Cored MIG Wire Fitment Guide

Washington Alloy THF-700HT-173 is a .045 in. hard face flux-cored MIG wire supplied on a 33 lb spool for rebuilding worn steel parts exposed to metal-to-metal abrasion. This article is built to help maintenance shops, repair departments, and industrial buyers verify whether this hardfacing wire matches the job before ordering.

For current availability, order verification, and shipping details,

Washington Alloy THF-700HT-173 Hard Face Flux-Cored Mig Wire .045 x 33 Lb. Spool

$357.05

In Stock

View Product

“>view this product at Arc Weld Store.

Key Takeaways

Product: Washington Alloy THF-700HT-173 hard face flux-cored MIG wire.
Size: .045 in. wire on a 33 lb spool.
Primary use: high metal-to-metal abrasion applications.
Deposit structure: martensitic; designed to work harden in service.
Common applications include rollers, conveyor screws, crusher rolls, and mill hammers.
Verify machine capacity, drive rolls, liner size, polarity, shielding gas, and base metal condition before ordering.

Product Overview

Washington Alloy 700HT is a hardfacing flux-cored wire intended for wear-facing work where abrasion resistance is more important than general fabrication weld strength. The Arc Weld Store listing describes this product as primarily used for high metal-to-metal abrasion. The manufacturer technical data states that 700HT produces martensitic weld deposits that work harden in service and bond well with fatigued or older hard-faced deposits.

This is not a general-purpose ER70S-6 replacement. It should be selected when the repair objective is wear resistance on appropriate steel components, not when the job requires a mild steel structural filler wire.

Upper-middle CTA: Need the .045 in. 33 lb spool?

Washington Alloy THF-700HT-173 Hard Face Flux-Cored Mig Wire .045 x 33 Lb. Spool

$357.05

In Stock

View Product

“>check current stock at Arc Weld Store before scheduling the repair.

Best For

Industrial maintenance hardfacing.
Metal recovery on worn steel components.
High abrasion areas where parts see metal-to-metal wear.
Crusher rolls, mill hammers, conveyor screws, rollers, and similar wear parts.
Repair departments that need a full 33 lb spool for recurring hardface work.

Key Specs

Field	Verified Detail
Brand	Washington Alloy
Product	THF-700HT-173 Hard Face Flux-Cored MIG Wire
SKU	THF-700HT-173 – 1 SPOOL
Wire diameter	.045 in.
Spool weight	33 lb
Wire type	Hardfacing flux-cored wire
Polarity from manufacturer procedure	DCEP
Typical .045 in. procedure range	Wire speed 195–475 ipm; amps 125–245; volts 25–29; electrical stickout 1/2–1 in.; CO2 35–45 cfh
Mixed gas note	Manufacturer TDS notes 1–2 volts lower used with mixed gas
Typical hardness	Rockwell C 58–61 per manufacturer TDS
Typical weld metal chemistry	Carbon, chromium, manganese, silicon, molybdenum, tungsten, nickel, vanadium, phosphorus, sulfur listed by manufacturer TDS
AWS classification	Unknown (Verify)
Certifications	Unknown (Verify)

Compatibility / Fitment Notes

Fitment for this product is less about torch model and more about whether your MIG or FCAW system can correctly feed and run .045 in. hardfacing flux-cored wire. Before ordering, verify that your feeder accepts 33 lb spools, your drive rolls match .045 in. flux-cored wire, your gun liner is sized correctly, and your power source can run the required amperage and voltage range.

Compatibility with a specific welding machine, feeder, gun, liner, drive roll, contact tip, shielding gas blend, or base metal is Unknown (Verify) unless confirmed against your equipment documentation and the manufacturer procedure data.

Before You Order

Machine model: Confirm your welder can run .045 in. FCAW hardfacing wire in the required output range.
Wire feeder: Verify 33 lb spool capacity and hub compatibility.
Drive rolls: Confirm the correct .045 in. flux-cored drive roll style. Compatibility: Unknown (Verify).
Gun liner: Confirm the liner supports .045 in. wire and is clean enough for consistent feed.
Contact tips: Use contact tips sized for .045 in. wire. Brand and series compatibility: Unknown (Verify).
Polarity: Manufacturer procedure data lists DCEP.
Shielding gas: Manufacturer procedure data lists CO2 ranges and notes lower voltage with mixed gas. Verify your exact procedure.
Base metal: Confirm the part is suitable for hardfacing and that previous deposits, cracking, or contamination are addressed.
Preheat/interpass: Manufacturer TDS notes that 300–500°F preheat/interpass may yield superior properties.
Application: Confirm the job is abrasion-focused rather than a structural joining weld.
Safety documentation: Review the SDS before use and confirm shop ventilation, PPE, and fume controls.

Accessories / Compatible Products

Because consumable fit depends on your exact MIG gun, feeder, and wire path, do not order tips, liners, nozzles, or drive rolls by wire diameter alone. Match the consumable series to your gun and confirm the .045 in. size before purchase.

View drive rolls at Arc Weld Store — verify .045 in. flux-cored compatibility before ordering.
View MIG consumables at Arc Weld Store — confirm contact tip, nozzle, diffuser, and liner series fitment.
Compare hard surface MIG wire at Arc Weld Store — useful when hardness, abrasion level, or wire size needs differ.
View respiratory protection options at Arc Weld Store — verify required protection for your shop’s exposure assessment.

Weld Support Parts Breakdown Reference

No torch-specific parts breakdown is required to identify this wire because the product is a welding consumable, not a gun or torch assembly. For safety documentation, review the confirmed hardfacing flux-cored SDS before use.

If you are replacing contact tips, liners, nozzles, diffusers, or drive rolls at the same time, use the parts breakdown for your specific MIG gun or feeder before ordering those items.

Common Applications

Crusher roll repair.
Mill hammer hardfacing.
Conveyor screw rebuilding.
Roller wear-facing.
Industrial equipment repair where metal-to-metal abrasion is the primary failure mode.
Maintenance welding on older hard-faced deposits when procedure and base metal condition are verified.

Shipping / Returns Notes

The Arc Weld Store product page lists free ground shipping to the lower 48 on qualifying orders, shipment from Corydon, Indiana, typical 1–2 business day shipping unless noted, and returns accepted on unused items in original packaging. Confirm current shipping, pickup, and return details on the product page before purchasing.

FAQ

Is Washington Alloy THF-700HT-173 a general MIG wire?

No. It is a hardfacing flux-cored MIG wire intended for abrasion-resistant deposits. Use a general-purpose filler only when the application calls for it.

What wire size is this spool?

The Arc Weld Store listing identifies this product as .045 in. wire on a 33 lb spool.

What polarity does the manufacturer procedure list?

The Washington Alloy technical data sheet lists DCEP for the typical FCAW welding procedures.

Can I use my existing MIG gun consumables?

Compatibility is Unknown (Verify). Confirm your gun series, liner size, contact tip size, drive roll style, and feeder capacity before ordering replacement consumables.

Does this wire require shielding gas?

The manufacturer procedure table lists CO2 flow ranges and notes voltage adjustment when using mixed gas. Verify the exact gas recommendation for your procedure, position, machine, and base metal.

Where should I buy Washington Alloy THF-700HT-173?

For this product, use Arc Weld Store as the primary ordering source:

Washington Alloy THF-700HT-173 Hard Face Flux-Cored Mig Wire .045 x 33 Lb. Spool

$357.05

In Stock

View Product

“>view Washington Alloy THF-700HT-173 at Arc Weld Store.

Safety Notes

Hardfacing flux-cored welding produces fumes, gases, arc radiation, sparks, heat, and electrical hazards. Review the SDS, follow your employer’s welding safety practices, use appropriate welding helmet, gloves, protective clothing, respiratory protection when required, and maintain adequate ventilation. The SDS references ANSI Z49.1 and OSHA Hazard Communication requirements. Always follow the manufacturer instructions and the safety program for your site.

Sources Checked

Arc Weld Store product page for Washington Alloy THF-700HT-173 .045 x 33 lb spool.
Washington Alloy 700HT technical data sheet.
Washington Alloy hardfacing flux-cored SDS supplied through Weld Support Parts blog media.
Weld Support Parts search for relevant support/breakdown reference.

End CTA: Ready to order the verified .045 in. 33 lb spool?

Washington Alloy THF-700HT-173 Hard Face Flux-Cored Mig Wire .045 x 33 Lb. Spool

$357.05

In Stock

View Product

“>view this product at Arc Weld Store and confirm current stock, shipping, and fitment before checkout.

May 20, 2026

Stick Welding Porosity Troubleshooting: Pinholes, Wormholes, Moisture, Arc Length, and Electrode Checks

Stick welding porosity usually comes from gas trapped in the weld metal before the puddle freezes. With SMAW, start with the electrode, base metal, arc length, amperage, polarity, and technique before blaming the welder. Pinholes after slag removal, wormholes in the bead, rough starts, popping arc behavior, and scattered pits usually point to moisture, contamination, long arc length, wrong rod handling, or welding over paint, oil, rust, zinc, primer, or damp steel.

The repair path is simple: stop welding, identify whether the porosity is surface-only or through the bead, clean the joint to bright metal, switch to known-good electrodes, shorten the arc, verify amperage and polarity, and run a controlled test bead on clean scrap. For low-hydrogen rods, especially 7018, porosity must be treated as a storage and hydrogen-control issue, not only a bead appearance problem. See the related WSP guide on 7018 rod moisture contamination when damp rods, sticking, or cracking risk are present.

Common Symptoms

Symptom	Likely Cause	First Check
Small pinholes after chipping slag	Moisture, contamination, or long arc	Try dry rods on clean scrap
Wormholes or tunnels in bead	Severe contamination or trapped gas	Grind out and clean joint
Porosity starts after rod change	Bad rod batch, damp coating, wrong rod storage	Compare against sealed rods
Porosity only at starts	Poor restart, long arc, damp rod tip	Clip/restrike properly and shorten arc
Porosity on rusty or painted steel	Surface contamination burning into puddle	Remove coating and re-test
Porosity with 7018 plus sticking	Low amperage, damp coating, bad arc length	Check storage and amperage

Likely Causes

Moisture in electrodes: Damp coating can release hydrogen and other gases into the weld pool. Low-hydrogen electrodes are especially sensitive. Opened 7018 should be stored according to the electrode manufacturer, code, and WPS requirements.

Dirty base metal: Oil, grease, paint, primer, rust, mill scale, cutting fluid, galvanized coating, and moisture can create gas pockets when heated. Stick welding is more tolerant than TIG or MIG, but it is not immune to contamination.

Long arc length: A long arc can reduce shielding from the electrode coating and pull air into the arc zone. This is common with new operators trying to see the puddle.

Wrong rod manipulation: Excessive whipping with low-hydrogen rods can cause porosity. Some cellulose rods tolerate whip-and-pause technique, but 7018 should normally be run with a short, steady arc.

Wrong amperage or polarity: Too-low amperage can leave a cold, sluggish puddle that traps gas. Wrong polarity can create instability, spatter, poor penetration, and porous starts. If the symptom includes sticking, review 7018 rod sticking causes and solutions.

Quick Checks

Use fresh, known-good electrodes from sealed or properly stored packaging.
Clean the weld area to bright metal at least 1/2 in beyond the weld zone.
Remove oil, paint, primer, zinc, moisture, rust, and grinding dust before welding.
Shorten the arc until the puddle is controlled and the arc sounds steady.
Verify polarity: 6010 commonly requires DCEP, while many 7018 rods run on AC or DCEP depending on formulation.
Check amperage against the rod diameter, position, and manufacturer chart.
Run one test bead on clean scrap with one change at a time.

Root Cause Analysis

If porosity disappears on clean scrap with fresh rods, the welder is probably not the root cause. The problem is usually the workpiece surface, electrode condition, or joint environment. If porosity follows one rod container but not another, quarantine the suspect rods. If porosity appears only in vertical or overhead work, look at arc length, travel speed, rod angle, and slag control.

For rod selection, the difference between cellulose and low-hydrogen electrodes matters. WSP’s 6010 vs 7018 guide explains that 6010 is used for digging penetration and root work, while 7018 is used for low-hydrogen structural welds. Do not store or run them the same way. Mixing 6010 and 7018 in the same oven or job box can create wrong-rod and wrong-storage problems.

Inspection Steps

Chip and wire-brush the weld. Confirm whether holes are isolated surface pits or continuous porosity.
Grind one defect open. If holes continue below the surface, remove the weld until sound metal is reached.
Inspect rod coating. Reject rods with cracked, swollen, oily, soft, rusty, chipped, or wet coating.
Check base metal. Look for paint, oil, water, galvanizing, primer, heavy rust, cutting fluid, and laminations.
Check machine setup. Confirm amperage, polarity, lead connections, work clamp contact, and cable condition.
Check technique. Look for long arc, excessive weave, whipping with low-hydrogen rods, or travel speed too fast for gas escape.
Make a comparison weld using clean scrap and fresh rods. If the test is sound, return to the workpiece and correct cleaning or joint conditions.

Test Procedures

Use a clean scrap coupon of the same material when possible. Run three beads: one with the suspect rod, one with a fresh rod from sealed storage, and one after changing arc length and amperage. Keep polarity, rod diameter, and base metal consistent. If only the suspect rod creates porosity, remove that rod batch from critical work. If all beads are porous, inspect work clamp contact, machine output, arc length, and surface preparation.

For 7018, test beads are not proof of low-hydrogen compliance. A rod can make an acceptable-looking bead and still be unacceptable for code, pressure, structural, lifting, or restrained work if exposure history is unknown. Follow the WPS, inspector, electrode manufacturer, or engineer requirement.

Visual Wear Indicators

Electrode coating cracks: moisture cycling, impact damage, or old stock.
Soft or powdery coating: moisture damage; do not use for critical welds.
Rust on exposed core wire: storage failure or aged rods.
Oily rod surface: contamination that can create porosity and fumes.
Blackened start pits: poor restart, contamination, or arc instability.
Glassy irregular slag on 7018: possible damp coating or incorrect settings.

Compatibility Notes

Verify electrode classification, rod diameter, polarity, amperage range, base metal, position, and storage requirement before ordering or welding. E6010, E6011, E7014, E7018, E7018-1, E7018AC, stainless electrodes, nickel cast-iron rods, and hardfacing electrodes do not share the same storage, polarity, or technique rules. When the rod is unknown, label it Unknown (Verify) and do not use it on critical welds.

What To Verify Before Ordering

Exact electrode class and brand required by the WPS or repair procedure.
Rod diameter that matches material thickness, position, and available amperage.
Machine output and polarity compatibility.
Whether 7018AC is required for an AC-only transformer machine.
Whether low-hydrogen storage, sealed cans, rod oven, or quiver control is required.
Base metal condition: clean mild steel, rusty repair work, galvanized, coated, cast iron, hardfacing, or unknown alloy.

Common Wrong-Part Mistakes

Using old open 7018 from a toolbox on a structural repair.
Buying standard 7018 for a machine that only runs AC poorly.
Using 6010 because it burns through contamination instead of cleaning the joint.
Running a specialty electrode like nickel or hardfacing without checking polarity and procedure.
Assuming porosity is always caused by amperage when the rod is damp or the base metal is contaminated.

Field Fix vs Proper Fix

Condition	Field Fix	Proper Fix
Pinholes with 7018	Try fresh dry rods on clean scrap	Correct rod storage and follow WPS exposure limits
Porosity over paint or rust	Grind test area clean	Remove coating from full weld zone before welding
Long arc porosity	Shorten arc and reduce travel speed	Retrain technique and verify settings
Damp rods in the field	Use sealed fresh rods for noncritical testing	Use approved oven/quiver procedure or discard
Wormholes in finished weld	Stop and mark defect	Grind out to sound metal and reweld under corrected conditions

Related Failure Paths

Porosity often travels with rod sticking, slag inclusions, lack of fusion, undercut, arc blow, cracking, and failed visual inspection. A bad ground or unstable arc can make the operator hold a longer arc, which then creates porosity. Damp 7018 can create porosity and increase hydrogen-cracking risk. Poor fume control is also common when welding dirty, coated, or contaminated steel; review welding fume extractor troubleshooting when smoke is not being captured at the arc.

Safety Notes

Do not weld over unknown coatings, paint, solvent residue, oil, galvanized coating, plating, or contaminated steel without identifying the hazard. Use ventilation, fume extraction, correct helmet shade, dry gloves, fire watch, and electrical safety practices. Keep your head out of the plume. Do not use wet rods, improvised rod heating, torch-baked electrodes, microwave drying, or truck-dash drying for low-hydrogen work.

Sources Checked

Washington Alloy electrode catalog sections on 6010, 7018, low-hydrogen welding tips, and porosity warnings related to whipping low-hydrogen electrodes.
Lincoln Electric consumables storage and handling guidance for covered electrodes and moisture-resistant packaging.
Weld Support Parts stick welding support articles on 7018 moisture contamination, 7018 sticking, 6010 vs 7018 selection, and fume extraction troubleshooting.

May 19, 2026

6010 vs 7018 Rod Selection Guide: When to Use Each Stick Electrode

Use 6010 when the weld needs deep penetration, fast-freeze puddle control, open-root tie-in, or tolerance for less-than-perfect steel. Use 7018 when the weld needs low-hydrogen deposit control, higher tensile classification, smoother fill and cap passes, or structural weld quality on clean steel. The common field mistake is treating them as interchangeable. They are not. A 6010 root can solve lack-of-fusion problems that a soft 7018 arc may not reach. A 7018 fill or cap can reduce hydrogen-cracking risk where a cellulose rod is the wrong choice.

For a quick comparison, the existing Weld Support Parts article 6010 Electrode vs 7018 Electrode: What Welders Need to Know covers the basic arc differences. This guide is focused on selection at the parts counter and in the field: base metal condition, machine output, polarity, joint type, code requirement, rod storage, and wrong-rod symptoms.

Fast Selection Rule

Job Condition	Choose 6010	Choose 7018
Open-root pipe or root pass	Best fit	Usually not first choice
Dirty, rusty, painted, or mill-scale steel	Better tolerance	Clean steel required
Structural fill and cap welds	Possible only if procedure allows	Preferred
Low-hydrogen requirement	No	Yes
Machine is AC-only	Wrong choice in most cases	Use 7018AC or AC-rated 7018
Need smooth bead appearance	Rougher, digging bead	Cleaner appearance
Vertical or overhead control	Strong fast-freeze control	Good with correct amperage and dry rods

What 6010 Does Better

6010 is a high-cellulose sodium SMAW electrode. Its value is arc force. The arc digs, the puddle freezes fast, and slag coverage is light compared with low-hydrogen rods. That makes 6010 useful for open roots, pipe roots, maintenance welds, and joints where penetration is the main concern. Weld Support Parts lists the Washington Alloy 6010 electrode as a high-cellulose sodium rod for deep penetration, fast-freezing puddles, and arc force, conforming to AWS A5.1 E6010 and ASME SFA 5.1 E6010.

Choose 6010 when the symptom is lack of root fusion, a cold root, poor tie-in at the land, or a root bead that will not keyhole. It is also the better rod when the base metal cannot be perfectly cleaned in field repair work. It does not replace cleaning, but it tolerates imperfect surfaces better than 7018.

What 7018 Does Better

7018 is an iron-powder, low-hydrogen SMAW electrode. It is selected for strength, crack resistance, smoother beads, and structural work where low hydrogen matters. The “70” indicates a 70 ksi tensile classification, the “1” indicates all-position capability, and the “8” indicates low-hydrogen iron-powder coating with AC or DC reverse polarity use depending on the specific product.

Choose 7018 when the weldment is structural, restrained, thick, high-strength, or subject to cracking concerns. Use it for fill and cap passes after a 6010 root where the procedure allows that sequence. For current selection on machines that do not run standard 7018 correctly, use the verified guide Should You Use AC or DC Current? When to Use 7018AC.

Common Symptoms When the Wrong Rod Is Used

7018 used where 6010 is needed: root bead sits cold, sidewall fusion is poor, arc will not dig through the joint, or slag traps appear at the root.
6010 used where 7018 is needed: bead profile is rough, hydrogen control is not acceptable, tensile classification may be below procedure, or cap appearance is poor.
Standard 6010 on the wrong machine: unstable arc, rod snuffing, arc outages, or inability to hold a keyhole.
Damp 7018: porosity, erratic starts, excess spatter, underbead cracking risk, and failed procedure control.

Inspection Steps Before Selecting Rod

Confirm the welding procedure or job requirement. Do not substitute 6010 for 7018 on code work unless the procedure permits it.
Check base metal condition. Rust, paint, heavy mill scale, and field contamination favor 6010 for penetration, but cleaning is still required.
Verify machine output. Standard 6010 normally needs DC electrode positive. 7018 may run DCEP or AC only if the rod is rated for it.
Confirm joint type. Open root and pipe root conditions often favor 6010. Structural fill, cap, and restrained welds often favor 7018.
Check rod storage. Opened 7018 must be handled as a low-hydrogen consumable. Do not treat it like 6010.

Test Procedures

Before committing to production welds, run a short test bead on matching scrap. With 6010, confirm arc force, keyhole control, root tie-in, and slag release. With 7018, confirm restart quality, slag peel, toe wet-out, and bead profile. If 7018 sticks immediately, review the troubleshooting path in 7018 Rod Sticking: Causes & Solutions before blaming the electrode.

For 1/8 in rods, many field settings fall near 75-125 amps for 6010 and around 90-140 amps for 7018, but the product data sheet and welding procedure control the final setting. Arc length should stay tight with both rods. Long arc length increases spatter, porosity risk, undercut, and poor bead control.

Visual Wear and Defect Indicators

6010 too cold: sticking, ropey bead, poor root wash, inconsistent keyhole.
6010 too hot: excessive burn-through, undercut, hard-to-control keyhole, thin root bead.
7018 too cold: high bead crown, slag inclusions, rod sticking, poor restart.
7018 too hot: undercut, excessive puddle fluidity, flat washed bead, poor vertical control.
Damp 7018: rough starts, porosity, arc instability, and higher cracking risk.

Compatibility Notes

Verify the rod against the base metal, welding procedure, machine output, polarity, position, and storage requirement. 6010 is not a low-hydrogen electrode. 7018 is not a deep-digging cellulose root rod. A machine that runs 7018 well may still run 6010 poorly if it does not support the required arc characteristics. A small AC transformer machine may require 7018AC instead of standard 7018.

Also verify the electrode holder and lead set. Overheated holders, loose jaws, undersized cable, and poor work clamp contact can mimic rod problems. For holder sizing and lead compatibility, use Welding Electrode Holder: Choose the Best for Stick Welding.

What To Verify Before Ordering

Electrode classification: E6010, E7018, E7018-1, E7018AC, or required low-alloy variant.
Rod diameter: match amperage range, joint size, position, and base metal thickness.
Polarity: DCEP, AC, or both depending on rod and machine.
Storage: low-hydrogen rods require dry storage control after opening.
Code requirement: AWS, ASME, customer WPS, or repair procedure.
Base metal: mild steel, low-alloy steel, pipe grade, weathering steel, or unknown steel.

Common Wrong-Part Mistakes

Ordering 6011 when the procedure calls for 6010 because both are cellulose rods.
Ordering standard 7018 for an AC-only machine instead of 7018AC.
Using 6010 for a low-hydrogen requirement because it penetrates better.
Using old opened 7018 from a shelf for critical welds.
Choosing rod diameter by habit instead of joint size, position, and amperage range.

Field Fix vs Proper Fix

A temporary field fix is to switch from 7018 to 6010 only when penetration or root control is the actual issue and the procedure allows it. Another temporary fix is to increase amperage slightly if 7018 is sticking. The proper fix is to match the electrode classification to the WPS, clean the joint, verify polarity, use dry low-hydrogen rods, and correct the ground path.

For 7018 storage, use a proper rod oven where required. The related Weld Support Parts rod oven guide YESWELDER BWX-01 Welding Rod Oven Review discusses portable electrode storage for E7018 and similar rods.

Related Failure Paths

Lack of fusion from soft arc or low amperage.
Hydrogen-assisted cracking from damp low-hydrogen electrodes.
Slag inclusion from incorrect rod angle or cold 7018 puddle.
Burn-through from excessive 6010 heat on open-root joints.
Arc instability from wrong polarity, poor ground, or incompatible machine output.

Safety Notes

SMAW produces arc radiation, fumes, hot slag, electrical shock hazards, and fire hazards. Use correct PPE, ventilation, dry gloves, proper work clamp contact, and approved electrode storage. Do not weld unknown coated, galvanized, painted, or contaminated material without identifying the coating and controlling fumes. Never substitute electrode class on load-bearing or pressure work without the welding procedure or engineer approval.

Bottom Line

6010 is the penetration and root-control rod. 7018 is the low-hydrogen structural rod. For pipe and open-root work, 6010 often starts the weld. For strength, fill, cap, and crack resistance, 7018 often finishes it. Selection should be based on WPS, polarity, base metal condition, storage control, and the failure you are trying to prevent.

May 19, 2026

Stick Electrode Sticking During Arc Start: Amperage, Arc Length, Rod Condition, Polarity, Ground, and Hot Start Checks

Stick electrode sticking during arc start usually means the arc is not getting hot and stable fast enough to keep the rod from fusing to the work. The common causes are low amperage, poor scratch/tap technique, arc length too short, damp or damaged rods, wrong polarity, weak work clamp contact, undersized leads, low open-circuit voltage, or an electrode that is difficult to restart. 7018, small-diameter rods, cold plate, dirty base metal, and small inverter machines can make the problem more noticeable.

Do not keep twisting a stuck rod until the flux breaks off. Break the arc, free the rod, chip the stuck metal off the end, and restart on clean steel. If the electrode sticks again, increase amperage slightly within the rod range, clamp directly to clean metal, use a confident scratch start, lift immediately to a short arc, and verify rod storage and polarity before blaming the welder.

Common Symptoms

Symptom	Likely Cause	First Check
Rod sticks instantly on touch	Low amperage, poor strike, bad ground	Increase amps slightly and clean clamp point
Rod starts then goes out	Arc held too close or travel starts too slow	Lift to short arc immediately after strike
7018 sticks repeatedly	Damp rod, low amps, wrong restart prep	Try fresh dry rod at correct range
Rod glows red near holder	Rod too small for amperage or held too long	Verify electrode diameter and current
Arc start is harsh and unstable	Wrong polarity, dirty metal, long leads	Check polarity, work return, and cable size
Only restarts stick	Slag cap on electrode end	Snap/clean the rod tip before restrike

Root Cause Analysis

During a stick start, the electrode must touch or nearly touch the work long enough to ionize the gap, then separate enough to form an arc. If the current is too low, the rod coating is damp, the work clamp path is weak, or the operator holds the rod against the plate too long, the electrode bonds to the work before the arc stabilizes. Sticking is most often a setup-and-technique problem, but weak leads, poor connectors, wrong polarity, or a welder with low start performance can contribute.

Quick Checks

Amperage: Start near the middle of the rod manufacturer’s range, then adjust in small steps.
Arc start: Scratch like striking a match or tap cleanly, then lift immediately.
Arc length: Keep a short arc about the rod core diameter; do not bury the rod.
Rod condition: Use dry, undamaged electrodes. Damp 7018 is a common sticking trigger.
Work clamp: Clamp directly to clean bare metal, not paint, rust, mill scale, or a loose table.
Polarity: Confirm the electrode supports the selected AC, DCEN, or DCEP setting.
Leads: Check cable size, connector fit, lug tightness, and holder jaws.

Inspection Steps

Identify the rod. Confirm electrode classification, diameter, and manufacturer amperage range.
Check the machine output. Verify AC/DC mode, polarity, amperage, hot-start setting if available, and input power.
Clean the start point. Remove rust, paint, oil, mill scale, and slag before striking.
Move the work clamp. Clamp close to the weld on clean metal and retest.
Inspect holder jaws. A loose or burned holder can reduce current transfer at the electrode.
Inspect cables and connectors. Look for undersized cable, long lead voltage drop, loose DINSE/Tweco connectors, hot lugs, or damaged insulation.
Try a fresh rod. If a dry new rod starts better than shop-stored rods, storage is part of the fault.
Use a controlled start. Scratch or tap, lift immediately, hold a short arc, then move into the joint.
Adjust amperage last. Increase only within the rod’s range after ground, polarity, and rod condition are verified.

7018 Start and Restart Notes

7018 can be harder to restart than 6010, 6011, or 6013 because the flux can form an insulating cap at the rod end. For restart, snap the rod tip, file/scratch the end, or strike on a run-on area before returning to the joint. Use dry rods from proper storage. For code or critical low-hydrogen work, do not use questionable 7018 just because it will eventually start.

Field Fix vs Proper Fix

Problem	Field Fix	Proper Fix
Rod sticks on first touch	Turn amperage up slightly	Set amperage by rod range and confirm ground/polarity
7018 restart sticks	Break the flux cap and restrike	Use dry rods and proper restart technique
Weak arc from bad clamp	Move clamp to clean metal	Replace worn clamp, lug, or lead
Long leads reduce start	Shorten lead route	Use correctly sized cable and tight connectors
Damp rods stick	Use fresh rods	Store low-hydrogen rods in approved oven control

Common Wrong-Diagnosis Mistakes

Blaming the welder before checking amperage, ground, rod storage, and polarity.
Running 7018 too cold because the bead looks easier to control.
Holding the rod against the plate too long during tap starts.
Dragging the rod without lifting enough to establish the arc.
Trying to weld with damp, chipped, oily, or shop-floor electrodes.
Ignoring hot electrode holder jaws, loose cable lugs, or undersized leads.
Using an electrode that does not match the machine’s AC/DC output.

Compatibility Notes

Stick-start performance depends on the electrode, machine output, lead set, holder, and clamp. Verify rod classification, rod diameter, allowed polarity, welder AC/DC output, open-circuit voltage requirements, cable size, connector type, electrode-holder rating, and work-clamp rating before ordering parts. WSP accessory references such as Miller Thunderbolt 210 stick accessories and CST 282 stick lead sets and Tweco-style connectors show why lead and connector fitment must be verified.

What To Verify Before Ordering

Welder output: AC, DC, or AC/DC.
Electrode classification, diameter, and polarity requirement.
Amperage range and whether hot start is available.
Electrode holder amperage rating and jaw condition.
Work clamp rating, jaw spring, copper contact, and lug condition.
Welding cable gauge, length, insulation, and connector style.
Whether the job requires low-hydrogen storage controls.

Related Failure Paths

7018 sticking from damp coating or low amperage.
Porosity from wet rods or long arc length.
Arc blow mistaken for starting trouble.
Weak arc from poor work return or undersized leads.
Slag inclusions from improper restarts.
Holder overheating from loose jaws or underrated parts.

Safety Notes

Do not touch live electrode, holder jaws, or work with bare skin.
Turn off the machine before changing leads, connectors, holder, or clamp.
Wear eye, hand, and body protection when striking and restarting electrodes.
Keep electrode stubs, hot rods, and slag away from gloves, leads, and combustibles.
Replace damaged cable insulation, cracked holders, and weak work clamps before welding.

Sources Checked

Weld Support Parts stick rod sticking, electrode holder, cable, and 7018 storage support pages.
Weld Support Parts stick lead set and connector product pages.
Hobart E7018 amperage and operating guidance.
Lincoln Electric 7018 AC product reference and stick support search results.

May 19, 2026

Stick Welding Arc Blow Causes and Fixes: Magnetic Arc Deflection, Ground Clamp Placement, AC/DC Settings, and Weld Sequence

Stick welding arc blow happens when the arc is pulled, pushed, or deflected away from the joint instead of staying under the electrode. The usual symptoms are a wandering arc, undercut on one side, heavy spatter, poor fusion, slag trapped at the toe, root bead washout, or a weld puddle that keeps being blown toward the end of the joint. Arc blow is most common with DC stick welding on magnetized steel, long welds, corners, ends of plates, pipe roots, heavy tack-ups, and poor return-lead placement.

Do not assume every rough stick arc is arc blow. First verify amperage, polarity, rod condition, arc length, work clamp contact, and base-metal cleanliness. If the arc consistently deflects in one direction even with a short arc and correct amperage, suspect magnetic arc blow. Move the work clamp, weld toward the clamp or away from it as needed, use a shorter arc, reduce amperage slightly, change weld sequence, use backstep welding, or switch to AC if the electrode and machine allow it.

Common Symptoms

Symptom	Likely Cause	First Check
Arc pulls to one side of joint	Magnetic field imbalance	Move work clamp and shorten arc
Arc blows forward at plate end	End-of-joint magnetic concentration	Use run-off tab or backstep sequence
Arc blows backward into finished bead	Return path or weld-sequence issue	Change clamp location and travel direction
Heavy spatter with wandering arc	Arc blow, high amperage, long arc	Reduce amperage slightly and tighten arc length
Root arc will not stay centered	Magnetized pipe or joint geometry	Check residual magnetism and return lead layout
Arc only rough on starts	Low amperage, damp rod, poor strike technique	Rule out setup before blaming arc blow

Root Cause Analysis

Arc blow is caused by magnetic forces acting on the welding arc. DC current creates a magnetic field around the electrode, workpiece, welding cable, and return path. When the magnetic field is unbalanced, the arc bends away from the intended path. Corners, plate ends, heavy tacks, residual magnetism, poor clamp placement, long current paths, and high current can all make the arc harder to control.

Thermal conditions can also move the puddle, and bad technique can look like arc blow. Long arc length, excessive amperage, wrong electrode angle, damp 7018, contaminated base metal, or a loose work clamp may create spatter and wandering behavior without true magnetic arc blow. Fix the basic setup first, then correct the magnetic path.

Quick Checks

Shorten the arc: Keep a tight, controlled arc. A long arc is easier for magnetic force to deflect.
Move the work clamp: Clamp closer to the weld, at the opposite end, or on a run-off tab to change current flow.
Reduce amperage slightly: High current increases magnetic force and spatter.
Change travel direction: Weld toward or away from the work connection and compare arc behavior.
Use backstep welding: Deposit short segments in the opposite direction of overall progress.
Try AC: If the electrode supports AC, switching from DC can reduce magnetic arc blow.
Check rod condition: Damp or damaged electrodes can mimic unstable arc symptoms.

Inspection Steps

Confirm the electrode. Verify rod classification, diameter, storage condition, polarity, and amperage range.
Check work clamp contact. Clamp to clean bare metal, not paint, rust, mill scale, a loose table, or a long indirect path.
Watch arc direction. True arc blow usually deflects consistently in one direction or worsens near ends and corners.
Move the clamp and retest. A change in arc behavior after moving the return lead confirms the magnetic path is involved.
Shorten the arc and reduce current slightly. If the arc stabilizes, high current or excessive arc length was part of the problem.
Change sequence. Use shorter beads, skip welds, backstep welds, or run-off tabs near plate ends.
Check for magnetized parts. Pipe, repair parts, and lifted steel can carry residual magnetism.
Use AC only when allowed. Confirm the rod and machine can run AC before switching.

Field Fix vs Proper Fix

Problem	Field Fix	Proper Fix
Arc blows at plate end	Shorten arc and reduce current	Add run-off tab or change weld sequence
Arc pulls away from joint	Move work clamp	Plan return-lead path before welding
Pipe root arc deflects	Change ground location	Measure residual magnetism and degauss if required
Heavy spatter from long arc	Tighten arc length	Reset amperage, angle, and travel speed
7018 arc rough and unstable	Try fresh dry rods	Control rod storage and confirm machine output

Common Wrong-Diagnosis Mistakes

Calling every rough stick arc “arc blow” when the amperage is too low or arc length is too long.
Moving the electrode angle only, without moving the work clamp or changing the current path.
Using damp 7018 rods and blaming magnetic arc blow for sticking and spatter.
Welding into plate ends without run-off tabs or sequence control.
Ignoring residual magnetism on pipe or repaired machinery parts.
Switching to AC without confirming the electrode is suitable for AC.

Compatibility Notes

Arc blow fixes depend on the machine, electrode, and lead setup. Some electrodes run well on AC; others are intended mainly for DC polarity. Verify the rod classification, welder output mode, DINSE/Tweco connector style, cable size, cable length, electrode holder rating, and work clamp rating before changing leads or polarity. WSP accessory references such as Miller Thunderbolt 210 stick accessories and stick lead sets and Tweco-style connectors show why connector and lead compatibility must be checked before ordering.

What To Verify Before Ordering

Welder output type: AC, DC, or AC/DC.
Electrode classification and allowed polarity.
Electrode diameter and amperage range.
Work clamp amperage rating and jaw condition.
Electrode holder rating and insulation condition.
Welding cable size, length, connector type, and lug condition.
Whether longer leads are needed to reposition the return path.
Whether the part is magnetized and requires degaussing support.

Related Failure Paths

Undercut caused by arc deflection.
Lack of fusion in root passes.
Porosity from unstable arc and slag/gas disturbance.
Excessive spatter from high current or arc blow.
Rod sticking from low amperage or damp electrodes.
Rejected welds from incomplete fusion at plate ends or corners.

Safety Notes

Do not touch live electrical parts or change leads with the machine energized.
Inspect electrode holder insulation, work clamp jaws, cable lugs, and connectors before welding.
Keep welding cables routed to avoid trip hazards, sharp edges, hot slag, and pinch points.
Use proper eye, face, hand, and body protection for SMAW.
Use ventilation and avoid welding on coated or contaminated steel without controls.
If severe arc blow prevents fusion control on code work, stop welding and involve supervision, inspection, or welding engineering.

Sources Checked

Lincoln Electric arc blow prevention guidance.
Lincoln Electric stick welding quality guidance.
ESAB magnetic arc blow guidance.
Weld Support Parts stick welding cable, holder, and electrode support pages.
Weld Support Parts stick accessory product pages.

May 19, 2026

7018 Rod Moisture Contamination Troubleshooting: Porosity, Rod Sticking, Arc Instability, and Hydrogen Cracking Risk

7018 rod moisture contamination is a low-hydrogen failure, not just a storage inconvenience. Damp E7018 electrodes can cause porosity, rough arc starts, excessive spatter, slag trouble, underbead cracking risk, and welds that fail inspection even when the bead looks acceptable. If 7018 rods have been left open in humidity, stored in a toolbox, rained on, or mixed with high-moisture rods, treat them as suspect before welding structural, code, pressure, lifting, or restrained joints.

The fast field decision is simple: use fresh rods from a sealed container for critical work, keep opened low-hydrogen rods in a rod oven, and do not assume a warm shop shelf or sealed plastic tube restores low-hydrogen condition. If rods are wet, oily, rusty, chipped, or unknown, discard them for critical work. Reconditioning must follow electrode manufacturer and code requirements, not a torch, microwave, job box, truck dash, or improvised heater.

Related stick welding checks include 7018 rod sticking causes, 6010 vs 7018 storage differences, rod oven storage support, and 7018 electrode support.

Common Symptoms

Symptom	Likely Moisture Link	First Check
Porosity or pinholes	Hydrogen/moisture in coating or contaminated joint	Use fresh oven-held rods and clean base metal
Rod sticks on starts	Damp coating, low amperage, poor restart prep	Try known-dry rod at correct amperage
Rough unstable arc	Moisture-altered coating	Compare sealed rods against suspect rods
Excess spatter	Damp coating or wrong arc length/amperage	Check rod storage and machine settings
Slag acts glassy or irregular	Flux coating condition problem	Inspect coating for chips, cracks, dampness
Delayed cracking	Hydrogen in restrained/high-strength weld	Stop using exposed rods for critical work

Why Moisture Matters on 7018

E7018 is designed as a low-hydrogen electrode. Its coating must stay dry so the weld deposit stays low in diffusible hydrogen. When the coating absorbs moisture, hydrogen can enter the weld metal and heat-affected zone. That matters most on thicker steel, high-strength steel, cold material, restrained joints, hardenable base metal, repair welds, and code work where hydrogen cracking risk must be controlled.

Quick Checks

Package condition: Use rods from intact hermetically sealed or manufacturer-approved packaging for critical work.
Exposure history: If the rod exposure time is unknown, treat it as Unknown (Verify), not acceptable.
Surface condition: Reject rods with cracked, chipped, swollen, oily, rusty, or soft coatings.
Storage oven: Opened 7018 should be stored in a holding oven at the manufacturer/code-required temperature.
Comparison test: Strike a fresh dry rod and a suspect rod on clean scrap. Rough arc, spatter, sticking, or porosity points to rod condition.
Job requirement: If the weld is structural or code-controlled, follow WPS, AWS code, and electrode manufacturer instructions.

Inspection Steps

Identify the electrode. Confirm E7018, E7018-1, E7018 H4R, E7018M, or other exact classification and brand.
Check the container. Confirm whether the package was sealed, vacuum packed, damaged, or previously opened.
Verify exposure time. Record how long rods were outside the oven and the shop humidity/rain exposure.
Inspect the coating. Look for cracks, chips, powdering, swelling, discoloration, oil, rust, or soft flux.
Separate suspect rods. Do not mix them back into the dry low-hydrogen oven inventory.
Check the rod oven. Verify temperature with a reliable thermometer, not just the dial setting.
Confirm rebake rules. Use the electrode manufacturer and job code. Do not invent a rebake schedule.
Run a controlled test only for noncritical screening. Test beads cannot prove low-hydrogen compliance.
Document disposition. Mark rods as fresh, oven-held, rebaked per procedure, downgraded to noncritical use, or discarded.

Storage and Reconditioning Notes

Low-hydrogen electrodes commonly require storage in a holding oven after opening. Manufacturer guidance often places low-hydrogen holding ovens in the 225–300°F range, but the exact temperature and exposure limits depend on electrode class, moisture-resistant suffix, manufacturer, and code. Some exposed rods may be rebaked one time under controlled conditions. Rods that became wet, oil-contaminated, cracked, or physically damaged should not be trusted for critical welds.

Field Fix vs Proper Fix

Condition	Field Fix	Proper Fix
Opened rods sat out overnight	Use fresh sealed rods for critical work	Follow manufacturer/code rebake or discard rule
Rods exposed to rain	Remove from low-hydrogen stock	Discard for code/critical work unless procedure permits otherwise
Rod sticks and spatters	Check amperage and try fresh rod	Correct storage, oven temp, and rod handling
No rod oven available	Use sealed rods only as opened	Add approved holding oven and exposure log
Mixed 6010 and 7018 in one warm box	Separate immediately	Store low-hydrogen rods separately at required temperature

Common Wrong-Part and Wrong-Process Mistakes

Using damp 7018 on restrained structural joints because the bead still looks smooth.
Storing 6010/6011 cellulosic rods in the same oven as 7018 low-hydrogen rods.
Believing sealed plastic tubes equal a code-compliant rod oven.
Rebaking rods without confirming the electrode classification and manufacturer rule.
Using exposed 7018 for pressure, lifting, structural, or code welds without WPS approval.
Blaming amperage for sticking when the rod coating is damp or damaged.

What To Verify Before Welding

Electrode classification and brand.
Whether the package was factory sealed or already opened.
Rod oven temperature and calibration status.
Maximum allowed exposure time from the WPS/code/manufacturer.
Whether rebake is allowed and exact rebake schedule.
Base metal strength, thickness, restraint, preheat, and hydrogen-cracking risk.
Whether the job permits reconditioned rods or requires fresh sealed/oven-held electrodes.

Related Failure Paths

Porosity from hydrogen/moisture contamination.
Rod sticking from damp coating and unstable starts.
Delayed hydrogen cracking in restrained or high-strength welds.
Slag irregularity from damaged coating.
Arc instability from wrong current, poor ground, or wet rods.
Failed inspection from undocumented electrode exposure control.

Safety Notes

Do not use wet or unknown 7018 rods for critical welds.
Do not heat rods with open flame, torches, microwaves, or uncontrolled shop heaters.
Use rod ovens according to manufacturer instructions and electrical safety requirements.
Use ventilation and keep your head out of welding fumes.
Follow the WPS, AWS code, engineer, or inspector requirement when low-hydrogen control is specified.

Sources Checked

Lincoln Electric low-hydrogen electrode storage and redrying guidance.
ESAB low-hydrogen electrode storage and redrying guidance.
Weld Support Parts 7018 sticking, 6010 vs 7018, rod oven, and 7018 electrode pages.
Hobart 7018 electrode performance guidance.

May 19, 2026

Nickel Stick Electrode Guide for Cast Iron Repair and Fitment

Nickel stick electrodes are commonly ordered for cast iron repair, build-up work, and joining cast iron to compatible dissimilar metals. Arc Weld Store’s Nickel Electrode collection includes Weldcote Metals and Washington Alloy nickel electrodes in verified package sizes and diameters. This guide is built to help buyers select the right nickel electrode option, verify fitment before ordering, and avoid downtime from choosing the wrong diameter, alloy type, or package size.

View Nickel Electrode options at Arc Weld Store

Key Takeaways

Arc Weld Store currently lists 4 nickel electrode products in the Nickel Electrode collection.
Verified brands include Weldcote Metals and Washington Alloy Co.
Verified electrode options include Nickel 99 and Nickel 55 products.
Verified diameters include 3/32 inch, 1/8 inch, and 5/32 inch, depending on product.
Compatibility, amperage range, polarity, and machine requirements should be verified before ordering.

Product Overview

The Nickel Electrode collection is focused on stick electrodes for cast iron repair and related industrial welding applications. The listed products include Weldcote Metals 99 Nickel Stick Electrode in a 1 lb package and Washington Alloy 55% Nickel Stick Electrode in 10 lb packages across multiple diameters.

Weldcote Metals 99 Nickel Stick Electrode - 1# Package (5/32" Diameter)

Washington Alloy 55% Nickel Stick Electrode 10LB Package (5/32" - 10 LB.)

Product	Brand	SKU	Verified Diameter	Package	Arc Weld Link
Weldcote Metals 99 Nickel Stick Electrode – 1# Package (5/32″ Diameter)	Weldcote Metals	299532X1	5/32 inch	1 lb	Weldcote Metals 99 Nickel Stick Electrode – 1# Package (5/32" Diameter) $67.20 In Stock View Product “>View product
Washington Alloy 55% Nickel Stick Electrode 10LB Package (5/32″ – 10 LB.)	Washington Alloy Co.	255532 – 10 LBS.	5/32 inch	10 lb	Washington Alloy 55% Nickel Stick Electrode 10LB Package (5/32" – 10 LB.) $263.52 In Stock View Product “>View product
Washington Alloy 55% Nickel Stick Electrode 10LB Package (1/8″ – 10 LB.)	Washington Alloy Co.	25518 – 10 LBS.	1/8 inch	10 lb	Washington Alloy 55% Nickel Stick Electrode 10LB Package (1/8" – 10 LB.) $304.05 Sold Out View Product “>View product
Washington Alloy 55% Nickel Stick Electrode 10LB Package (3/32″ – 10 LB.)	Washington Alloy Co.	255332 – 10 LBS.	3/32 inch	10 lb	Washington Alloy 55% Nickel Stick Electrode 10LB Package (3/32" – 10 LB.) $284.08 In Stock View Product “>View product

Best For

Cast iron repair work where a nickel stick electrode is required.
Repairing gray iron castings when the selected electrode matches the application requirements.
Joining cast iron to mild steel or stainless steel when verified by the product description and welding procedure.
Maintenance departments repairing motor blocks, housings, machine parts, frames, defective castings, or worn sections.
Buyers who need to compare Nickel 55 and Nickel 99 options before ordering.

Need the correct nickel electrode for a repair job? Compare Nickel Electrode options at Arc Weld Store.

Key Specs

Collection	Nickel Electrode
Verified product count	4 products
Verified brands	Weldcote Metals; Washington Alloy Co.
Verified alloy families	Nickel 99; Nickel 55
Verified package sizes	1 lb; 10 lb
Verified diameters	3/32 inch; 1/8 inch; 5/32 inch
Amperage range	Unknown (Verify)
Polarity	Unknown (Verify)
AWS classification	Unknown (Verify)
Certifications	Unknown (Verify)

Compatibility / Fitment Notes

Nickel stick electrodes are not selected by brand alone. The buyer should confirm alloy type, electrode diameter, base metal condition, welding position, power source capability, required machinability, and repair procedure before ordering.

Nickel 99: Arc Weld Store states the Weldcote NI-99 electrode is designed for welding gray iron castings to themselves and joining them to mild steels or stainless steels. The product description also states that Nickel 99 weld deposits are machinable.
Nickel 55: Arc Weld Store states Washington Alloy Nickel 55 is designed for all-position joining and surfacing of cast iron, malleable iron, and ductile iron to itself or dissimilar metals such as mild steels, stainless steel, wrought alloys, or high nickel alloys.
Diameter fitment: Confirm that the selected 3/32 inch, 1/8 inch, or 5/32 inch electrode diameter matches your welding machine output, electrode holder, joint design, casting thickness, and repair procedure.
Application limits: Compatibility with a specific casting, machine, electrode classification, or welding procedure is Unknown (Verify) unless confirmed against the job requirements.

Before You Order

Use this checklist before purchasing nickel stick electrodes for cast iron repair or maintenance welding:

Confirm the base metal: gray iron, cast iron, malleable iron, ductile iron, mild steel, stainless steel, wrought alloy, or high nickel alloy.
Confirm whether Nickel 55 or Nickel 99 is required for the repair procedure.
Confirm electrode diameter: 3/32 inch, 1/8 inch, or 5/32 inch.
Confirm package quantity: 1 lb or 10 lb.
Confirm welding machine amperage capability for the selected diameter: Unknown (Verify).
Confirm polarity requirement: Unknown (Verify).
Confirm welding position requirements.
Confirm whether the weld deposit must be machinable after repair.
Confirm preheat and interpass requirements for the casting and electrode. Arc Weld Store lists a preheat and interpass temperature of not less than 350°F / 175°C for Weldcote NI-99.
Confirm OEM number or internal maintenance part number, if replacing a stocked electrode.
Confirm storage requirements for opened electrode containers: Unknown (Verify).
Confirm safety controls for fumes, ventilation, PPE, fire watch, and hot work permits.

Accessories / Compatible Products

Only technically relevant accessories should be added to a nickel electrode order. Compatibility must be verified for each shop setup and application.

Accessory Group	Why It May Be Needed	Compatibility	Arc Weld Link
Stick welding equipment	Power source and stick welding setup support	Unknown (Verify)	View stick welding equipment
Electrode holders	Holding the selected electrode diameter during SMAW welding	Unknown (Verify)	View electrode holders
Ground clamps	Work connection for stick welding circuits	Unknown (Verify)	View ground clamps
Stick welding gloves	Hand protection for stick welding work	Unknown (Verify)	View stick welding gloves

Common Applications

Repairing castings.
Welding gray iron castings to themselves.
Joining gray iron castings to mild steel or stainless steel when verified by the welding procedure.
Repairing motor blocks, housings, machine parts, frames, defective castings, and worn sections when the selected electrode is appropriate.
Building up worn cast iron sections with a verified Nickel 55 repair procedure.

Shipping / Returns Notes

Arc Weld Store product pages list shipment from Corydon, Indiana, typical fulfillment of 1–2 business days unless noted, free ground shipping to the lower 48 on qualifying orders, pickup availability at the Corydon location, and returns accepted on unused items in original packaging. Always confirm current shipping, pickup, discount, and return details on the product page before ordering.

FAQ

What nickel electrode options are listed in this Arc Weld Store collection?

The collection includes Weldcote Metals 99 Nickel Stick Electrode and Washington Alloy 55% Nickel Stick Electrode options in verified diameters of 3/32 inch, 1/8 inch, and 5/32 inch.

Is Nickel 55 or Nickel 99 better for cast iron repair?

That depends on the casting, repair procedure, weld deposit requirements, and machinability requirements. Arc Weld Store describes Weldcote NI-99 as machinable and designed for gray iron castings. Arc Weld Store describes Washington Alloy Nickel 55 as suited for all-position joining and surfacing of cast iron, malleable iron, and ductile iron. Verify the correct alloy before ordering.

Can I choose the electrode by diameter only?

No. Diameter is only one selection factor. Confirm alloy family, amperage range, polarity, welding position, base metal, repair procedure, and package quantity before ordering.

Are amperage ranges listed for these products?

Amperage range is Unknown (Verify) from the Arc Weld Store product pages checked for this article. Confirm the amperage range before purchasing or welding.

Where can I get fitment help before ordering?

Arc Weld Store product pages direct buyers to email sales@arcweldinc.com with the process, material, thickness, part number, equipment model, and application for help choosing the correct item.

Safety Notes

Nickel electrode welding can produce fumes, heat, arc radiation, sparks, and hot work hazards. Follow your employer’s welding safety program, SDS requirements, ventilation requirements, PPE requirements, and applicable OSHA welding, cutting, and brazing requirements. Do not weld on containers, castings, or parts that may contain trapped gases, flammable residue, unknown coatings, or hazardous contamination until they are properly evaluated and prepared.

Sources Checked

Arc Weld Store Nickel Electrode collection page.
Arc Weld Store Weldcote Metals 99 Nickel Stick Electrode product page.
Arc Weld Store Washington Alloy 55% Nickel Stick Electrode 5/32 inch product page.
Arc Weld Store Washington Alloy 55% Nickel Stick Electrode 1/8 inch product page.
Arc Weld Store Washington Alloy 55% Nickel Stick Electrode 3/32 inch product page.
OSHA welding, cutting, and brazing standards pages for safety context.

Check current Nickel Electrode options at Arc Weld Store

May 16, 2026

E70S-6 Solid MIG Wire vs E71T-1 Flux Core Wire: Technical Comparison for Mild Steel Welding

Choosing between E70S-6 solid MIG wire and E71T-1 gas-shielded flux core wire affects weld appearance, penetration, deposition rate, cleanup time, outdoor usability, and productivity. While both are commonly used for carbon steel fabrication, they behave very differently in real shop conditions.

This guide compares ER70S-6 solid wire to E71T-1 flux-cored wire from a practical welding support perspective, including arc behavior, position capability, contamination tolerance, gas requirements, common failure paths, and what to verify before switching wire types.

Key Takeaways

ER70S-6 produces cleaner welds with lower slag and less post-weld cleanup.
E71T-1 typically provides higher deposition rates and deeper penetration.
E71T-1 handles thicker steel and out-of-position welding better in structural applications.
ER70S-6 is often preferred for automotive, fabrication, and cleaner shop environments.
E71T-1 generally tolerates mill scale and less-than-perfect surface conditions better.
Both wires require shielding gas, but gas type and polarity differ by application.
Incorrect polarity is a common cause of poor arc stability and excessive spatter.

What These Wires Actually Are

ER70S-6 is a solid mild steel MIG wire used with external shielding gas. The wire contains higher levels of manganese and silicon deoxidizers, helping it tolerate light mill scale and minor contamination better than some other solid wires.

E71T-1 is a tubular flux-cored wire that also uses external shielding gas. Unlike self-shielded flux core wires, E71T-1 relies on both internal flux ingredients and shielding gas for arc protection and slag formation.

Main Process Differences

Feature	ER70S-6 Solid MIG	E71T-1 Flux Core
Wire Type	Solid wire	Tubular flux-cored wire
Shielding Gas	Required	Required
Common Gas	75/25 Ar/CO2	75/25 or 100% CO2 (verify manufacturer data)
Polarity	DCEP	DCEP
Slag Production	Minimal	Moderate to heavy
Spatter	Lower	Moderate
Penetration	Moderate	Higher
Deposition Rate	Lower	Higher
Thin Material Control	Better	Harder to control
Outdoor Wind Resistance	Poor	Better but still gas-dependent
Cleanup Time	Lower	Higher due to slag

What This Means in Real Welding Conditions

ER70S-6 Solid Wire

ER70S-6 is commonly used where weld appearance matters and cleanup time needs to stay low. Automotive fabrication, light manufacturing, maintenance work, and thinner mild steel projects are common applications.

The arc is generally smoother and easier to control. This makes it easier for many welders to manage short-circuit transfer on thinner material without excessive burn-through.

However, ER70S-6 is more sensitive to wind and gas coverage issues. Porosity becomes common quickly when shielding gas flow is disrupted.

E71T-1 Flux Core

E71T-1 is widely used in structural steel, heavier fabrication, field repair, and production welding where deposition rate and penetration are priorities.

The flux system helps support the puddle during vertical and overhead welding. Many welders find E71T-1 easier for all-position work on thicker steel than solid wire.

The tradeoff is increased slag generation, more smoke, additional cleanup, and greater risk of slag inclusions if travel angle or interpass cleaning is poor.

Common Symptoms and Process Problems

Symptom	Likely With	Common Cause	Quick Check	Fix
Porosity	ER70S-6	Gas coverage loss	Check flowmeter and drafts	Increase shielding consistency
Slag inclusions	E71T-1	Poor slag removal	Inspect between passes	Clean thoroughly before reweld
Cold lap	Both	Low heat input	Inspect toe fusion	Adjust voltage/WFS
Excess spatter	Both	Incorrect settings or polarity	Verify polarity	Correct DCEP setup
Undercut	E71T-1	Excess travel speed	Inspect weld toes	Reduce travel speed
Burn-through	ER70S-6	Thin material overheating	Inspect backside	Lower voltage or increase travel speed

What Usually Wears Out First

Contact tips from wire abrasion and heat cycling
MIG nozzles from spatter accumulation
Drive rolls from flux dust contamination
Liners from flux residue buildup
Diffusers exposed to overheating and spatter blockage

Compatibility Notes

Before switching between ER70S-6 and E71T-1, verify:

Drive roll style and wire diameter compatibility
Correct polarity setup
Shielding gas type
Machine output capacity
Gun amperage rating
Liner condition
Duty cycle requirements
Wire feed system compatibility

Some smaller hobby MIG welders may struggle with larger diameter E71T-1 wires during extended duty cycles.

Verify machine manufacturer recommendations before running .045″ flux core wire or heavy structural applications.

What To Verify Before Ordering

Verify Item	Why It Matters
Wire Diameter	Affects feedability and amperage range
Spool Size	Must fit feeder hub and spindle
Shielding Gas Compatibility	Incorrect gas affects arc stability
Polarity Requirements	Wrong polarity creates severe arc issues
Gun Rating	Flux core often runs hotter
Application Position	Vertical welding behavior differs
Base Metal Thickness	Thin material may favor solid wire

Common Wrong-Part and Setup Mistakes

Using knurled drive rolls on solid wire
Running E71T-1 with incorrect shielding gas
Forgetting to reverse polarity after switching wire types
Using contaminated liners after flux core runs
Trying to weld thin automotive sheet metal with oversized flux core wire
Using low gas flow rates in drafty environments

Field Fix vs Proper Fix

Problem	Temporary Field Fix	Proper Fix
Birdnesting	Trim wire and rethread	Replace worn liner and inspect drive rolls
Poor gas coverage	Increase CFH temporarily	Repair leaks and block drafts
Slag inclusions	Grind and reweld area	Correct angle and clean between passes
Excessive spatter	Adjust settings slightly	Verify polarity, gas, and wire condition

Related Failure Paths

Porosity from poor gas coverage
Wire feeding instability from worn liners
Slag inclusions from improper cleaning
Lack of fusion from incorrect voltage settings
Contact tip overheating from excessive duty cycle
Excess smoke exposure from poor ventilation

Inspection Steps

Inspect wire for rust or contamination before loading.
Verify polarity directly at machine terminals.
Confirm gas flow with an actual flowmeter reading.
Check liner resistance while feeding wire.
Inspect nozzle and diffuser for blockage.
Examine weld toes for undercut or lack of fusion.
Remove all slag before additional E71T-1 passes.

Safety Notes

E71T-1 typically generates more fumes and smoke than ER70S-6.
Always maintain proper ventilation and respiratory protection when required.
Flux core slag can eject during chipping and grinding operations.
Verify correct PPE for grinding and weld cleanup.
Follow ANSI Z49.1 and OSHA welding safety guidance.

FAQ

Is E71T-1 stronger than ER70S-6?

Both are commonly rated at 70 ksi tensile strength classifications, but E71T-1 often provides better penetration and higher deposition rates in structural applications.

Can E71T-1 be used outdoors?

Yes, but it still requires shielding gas. It handles mild wind better than solid wire, though excessive drafts still cause porosity.

Which wire is better for thin steel?

ER70S-6 is generally easier to control on thinner materials due to lower slag production and smoother short-circuit transfer characteristics.

Does E71T-1 require slag removal?

Yes. Slag should be fully removed between passes to avoid inclusions and weld defects.

Next Step

If your welds suffer from porosity, excessive spatter, feeding problems, or inconsistent penetration, inspect the full wire feed system before changing machines. Consumables, liners, drive rolls, polarity, and gas setup usually create more welding problems than the power source itself.

Sources Checked

AWS filler metal classification references
Lincoln Electric flux-cored wire documentation
Miller Electric MIG and flux core setup references
ESAB consumable documentation
Weld Support Parts internal support content

May 15, 2026