TC 70S-2 16 Washington Alloy .045, 11 Lb. 70S-2 MIG Wire, Pack of (1): Product Breakdown

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Washington Alloy TC 70S-2 16 is a solid MIG wire in .045 in. diameter on an 11 lb spool. The core value of this wire is straightforward: it is intended for mild-steel fabrication, maintenance, and repair where stable feeding and practical arc control matter more than marketing claims. The ER70S-2 classification is typically used for cleaner welds on steel with light mill scale or minor surface contamination, but it is not a substitute for proper joint prep. Always verify the base metal condition and welding procedure before use.

Key Takeaways

• .045 in wire is commonly chosen when higher deposition and faster fill are needed, but the actual setup must match the machine and gun system.
• ER70S-2 is a solid wire choice for mild steel; it is not a universal fix for dirty base metal or poor fit-up.
• Feed consistency depends on drive roll condition, liner size, contact tip wear, and torch routing.
• If you are unsure whether this wire fits the job, verify the procedure, shielding gas, and machine capability before loading the spool.

What This Wire Is For

This product is positioned for general mild-steel MIG welding in fabrication and maintenance environments. The triple-deoxidized ER70S-2 chemistry is commonly used to tolerate light surface oxidation better than basic solid wires, but the practical result depends on current settings, gas coverage, and operator technique. Use it as a production filler wire when the weldment calls for solid wire MIG on steel and the setup is already aligned to .045 in wire.

If you are comparing options for steel filler metal selection, a filler metal finder can help you narrow down the starting point. It does not replace the welding procedure or a code requirement. Use the WSP filler metal finder as a selection reference only, then verify the final match against the application requirements.

Setup Checks Before You Load the Spool

Check: Confirm the machine is configured for .045 in solid wire. Verify drive rolls, gun liner, and contact tip size are appropriate for the wire diameter. Unknown (Verify) if the existing setup was previously used for a different diameter.

Inspect: Look at the spool wrap, wire surface, and feed path. Any kinks, corrosion, or contamination can cause feed irregularity and arc instability.

Verify: Confirm shielding gas type and flow are correct for the procedure. The product details provided here do not state a gas requirement, so use Unknown (Verify) and follow the approved WPS or shop standard.

Check: Make sure the polarity matches solid MIG wire requirements for your process. If polarity is not confirmed by procedure or machine label, treat it as Unknown (Verify).

Inspect: Clean the work lead connection, gun neck, liner entrance, and drive rolls. Small restrictions in the feed path often show up as birdnesting or erratic burnback.

Verify: Test feed on scrap before going to production. A short trial pass is faster than correcting a bad setup on the part.

Troubleshooting and Support

If the wire feeds poorly

Check drive roll tension first. Too much pressure flattens the wire and increases drag; too little lets the rolls slip. Inspect the liner for wear, contamination, or incorrect size. Verify that the contact tip is not oversized or worn out. If the wire was stored in a humid area, inspect it for surface oxidation before loading.

If the arc is unstable

Inspect the contact tip, nozzle, and work clamp. Verify consistent stickout and travel speed. If the arc wanders after a spool change, confirm the wire is seated correctly in the feeder and that the gun cable is not sharply bent.

If weld quality is inconsistent

Check base-metal prep before changing machine settings. ER70S-2 can help with light contamination, but it cannot compensate for heavy rust, paint, oil, or poor joint alignment. Verify fit-up, cleaning method, and shielding coverage before assuming the wire is the problem.

For surface prep support, the Weld Support Parts blog includes a wire-wheel and pen-brush article that can help with cleaning strategy: Rocaris 6 Pack Wire Wheel & Pen Brush Set: Carbon Steel for Weld Cleaning & Surface Prep. Use it as a cleaning reference, not a process approval.

Product and Parts Notes

The provided product is the only confirmed item for this article: TC 70S-2 16 Washington Alloy .045, 11 Lb. 70S-2 MIG Wire, Pack of (1). The available listing information identifies it as an ER70S-2 solid MIG wire on an 11 lb spool. Any additional details about spool construction, manufacturing tolerance, or machine compatibility are Unknown (Verify) unless confirmed by the product page or your shop procedure.

If you need to cross-check whether this wire belongs in a larger consumables strategy, use the WSP product resources and internal references already approved for your team. Do not assume that a similar-looking wire will share the same operating window.

Safety Notes

• Read the approved welding procedure before use.
• Verify shielding gas, polarity, and machine setup before striking an arc.
• Keep hands clear of the wire feed path and drive rolls during loading.
• Use proper eye, face, hand, and body protection for MIG welding.
• Inspect the gun, cable, and work clamp for damage before operation.
• Store wire dry and protected from contamination.

FAQ

Is this wire only for mild steel?

The confirmed product information identifies it as ER70S-2 solid MIG wire for mild-steel fabrication, maintenance, and repair. Use on other metals is Unknown (Verify) unless your procedure specifically approves it.

Can I use this wire on rusty or dirty material?

ER70S-2 is often selected when there is light mill scale or minor surface contamination, but heavy rust, oil, paint, or poor joint prep still need removal. Inspect the base metal and verify cleaning requirements first.

What machine settings should I use?

Unknown (Verify). Machine settings depend on the welding procedure, material thickness, transfer mode, shielding gas, and joint design. Start from the approved WPS or manufacturer guidance, then verify on scrap.

Will an 11 lb spool fit my feeder?

Unknown (Verify). Spool size and hub compatibility vary by machine and feeder design. Check the feeder documentation and compare it with the spool dimensions and adapter requirements before purchasing.

Sources Checked

• ArcWeld product page: TC 70S-2 16 Washington Alloy .045, 11 Lb. 70S-2 MIG Wire, Pack of (1)
• Weld Support Parts internal product reference for the same item
• Weld Support Parts blog reference on weld-cleaning surface preparation

Support note: If you are building a consumables list for steel MIG work, start with the approved procedure, then verify feeder setup, wire diameter, and base-metal condition. That sequence prevents most wire-related problems before they start.

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