TC 70S-2 093 Washington Alloy .035, 33 Lb. 70S-2 MIG Wire, Pack of (1): Product Breakdown

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Washington Alloy TC 70S-2 093 is a .035 in (0.9 mm) ER70S-2 solid MIG wire on a 33 lb (15 kg) spool. For buyers and support teams, the main question is not whether the wire can weld mild steel—it can—but whether it matches the job’s fit-up, base-metal condition, and feeder setup. This article breaks down where this wire fits, what to verify before use, and how to troubleshoot common feeding and weld-quality issues without guessing at specifications that are not documented here.

Key Takeaways

• ER70S-2 is a solid MIG wire used for mild-steel fabrication, maintenance, and repair.
• The .035 in diameter is a common general-purpose size, but final selection depends on procedure, material thickness, and wire-feed setup.
• This product is described as triple-deoxidized with Al/Ti/Zr chemistry, which is intended to help when base metal has light mill scale or minor surface contamination.
• The listing indicates a 33 lb spool and pack of one.
• If your process, joint design, or code requirement is uncertain, verify the WPS, wire classification, and machine settings before welding.

What This Wire Is For

As listed, TC 70S-2 093 is aimed at mild-steel work in fabrication, maintenance, and repair. That makes it relevant for shops that need a practical solid wire for general production work and field repair where clean surface prep is not always perfect. The ER70S-2 classification is commonly used when a shop wants a wire that tolerates light oxidation better than a basic clean-steel setup.

Do not assume this wire is the right answer for every joint. A MIG wire selection still depends on base metal chemistry, joint design, shielding gas, transfer mode, and the required mechanical properties of the finished weld. If any of those points are unclear, treat this product as a candidate, not a final approval.

Inspect Before You Load the Spool

Before installing the spool, do a basic receiving check.

• Check the spool label against the purchase record. Confirm the product title and ER70S-2 classification.
• Inspect the wire surface for visible rust, oil, kinks, or loose winding.
• Verify the spool fits the feeder without forcing the hub or retainer.
• Inspect the drive rolls, inlet guide, liner, and contact tip for wear or debris before loading the wire.
• Verify the shielding gas, polarity, and wire-feed settings are correct for the procedure being used.

If the shop has recurring feed issues, the wire is not the first thing to blame. Check the feeder path, tension, liner condition, and tip wear before changing consumables again.

Troubleshooting Support: What to Check First

Problem: Erratic feeding or birdnesting

• Check drive-roll pressure. Too much pressure can deform the wire; too little can slip.
• Inspect the liner for wear, contamination, or tight bends in the gun cable.
• Verify the contact tip size matches the wire diameter. If unsure, use Unknown (Verify) until the correct tip is confirmed.
• Check the wire path from spool to gun for sharp drag points.

Problem: Excess spatter or unstable arc

• Inspect shielding gas flow and nozzle condition.
• Verify voltage and wire-feed speed against the procedure or WPS.
• Check that the work clamp has solid contact and the joint is clean enough for the process.
• Inspect for contamination such as paint, oil, or heavy scale.

Problem: Porosity in the weld bead

• Verify gas coverage at the nozzle and around the joint.
• Check for drafts, leaks, or a damaged gas hose.
• Inspect the base metal surface and remove moisture, oil, and heavy rust before welding.
• Verify the filler wire is not contaminated from poor storage.

Selection Support: Where to Confirm the Filler Metal

If your team needs a starting point for filler selection or cross-checking wire classifications, use the WSP resources as reference tools rather than automatic approvals. When available, the filler metal finder should be treated as a selection starting point, not a guarantee that a procedure is approved for your job, code, or base metal combination.

• WSP lookup page
• WSP filler metal finder page

Use those pages to narrow down options, then verify the actual WPS, shielding gas, and wire classification before production use.

Product and Parts Notes

This listing is for one spool of Washington Alloy TC 70S-2 093. The documented size is .035 in and the documented spool weight is 33 lb. Beyond that, do not assume details such as drive-roll type, recommended gas mix, or exact machine compatibility unless your internal procedure sheet or manufacturer documentation confirms them. For uncertain technical details, mark them as Unknown (Verify).

For buyers, the important points are simple: confirm the classification, confirm the diameter, confirm the spool weight, and confirm that the feeder setup matches the wire path requirements of your machine. If the wire is being purchased for a repair bay, make sure the operators know whether the work is light fabrication, maintenance welding, or a qualified procedure with tighter limits.

Practical Use Notes

Triple-deoxidized ER70S-2 wires are often chosen when the surface is not ideal, but that does not eliminate prep. Remove loose scale, paint, oil, moisture, and heavy corrosion whenever possible. The more contaminated the joint, the less likely any MIG wire will produce reliable results. The right response is better cleaning, not overreliance on filler metal chemistry.

For shop support teams, the right workflow is: identify the base metal, confirm the required process, match the filler classification, and verify the feeder hardware. This wire may be a good general-purpose option, but the procedure still controls the final weld.

Safety Notes

• Use proper PPE for MIG welding, including eye, face, hand, and body protection.
• Keep the work area ventilated and control fumes at the source when possible.
• Do not weld on coated or unknown materials until hazards are identified.
• De-energize equipment before servicing the feeder, liner, or gun components.
• Store wire clean and dry to reduce contamination risk.

FAQ

Is TC 70S-2 093 suitable for mild steel?
Yes, the listed application is mild-steel fabrication, maintenance, and repair. Final suitability still depends on the WPS and job requirements.

Can I use this wire on material with light mill scale?
The product description says the triple-deoxidized ER70S-2 chemistry is suited for light mill scale or minor surface contamination. That is helpful, but it is not a substitute for proper cleaning.

Does .035 in wire work in every MIG machine?
No. Wire diameter compatibility depends on the feeder, drive rolls, liner, contact tip, and procedure. Verify the setup before loading the spool.

Is the shielding gas confirmed in the product listing?
Unknown (Verify). The available product information does not document a specific gas requirement.

Sources Checked

• ArcWeld product listing: TC 70S-2 093 Washington Alloy .035, 33 Lb. 70S-2 MIG Wire, Pack of (1)
• Provided product short description and source idea
• Allowed internal links provided in the task

This draft uses only the provided product information and internal links. Any details not explicitly documented should be treated as Unknown (Verify).

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