Mild Steel - Tig Rod
Mild steel TIG welding rod (GTAW filler) from HYW Products in ER70S-6 and premium triple-deoxidized ER70S-2. Both deposit clean, 70,000 psi welds under 100% argon on DCEN, supplied in 36" cut lengths — 1/16", 3/32", and 1/8" diameters.
Buying guide, comparison chart & FAQ — click to expand
| Rod | AWS | Tensile | Character | Best For |
|---|---|---|---|---|
| ER70S-6 | A5.18 | 70 ksi | High Mn/Si deoxidizers | General-purpose TIG; tolerant of light scale |
| ER70S-2 | A5.18 | 70 ksi | Triple-deoxidized (Zr/Ti/Al) | Premium; X-ray pipe root passes, out-of-position GTAW |
Both rods weld on 100% argon, DCEN (straight polarity). ER70S-2's extra deoxidizers give cleaner, porosity-free welds on less-than-perfect base metal.
Shop by Rod
- › ER70S-6 TIG Rod — general-purpose 70 ksi filler
- › ER70S-2 TIG Rod — premium triple-deoxidized root-pass filler
Frequently Asked Questions
What gas and polarity for mild steel TIG?
Use 100% argon on DCEN (electrode-negative). That's standard for steel GTAW with both ER70S-6 and ER70S-2.
ER70S-2 vs ER70S-6 for TIG?
ER70S-6 is the general-purpose choice. ER70S-2 is triple-deoxidized for the cleanest, most porosity-free welds — preferred for X-ray-quality pipe root passes and out-of-position work.
Also see: Mild Steel MIG Wire · Mild Steel Stick Electrodes
