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ER70S-2 Carbon Steel TIG Welding Rod 5/32" (4.0mm) - 10lb

$6.88/lb $43.00/10 lb tbe only $4.30/lbSave 37%

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OVERVIEW

Premium Mild Steel TIG Rods for Clean, Strong Welds

Take your TIG welding projects to the next level with our ER70S-2 Mild Steel TIG Rods. Sized at a substantial 5/32" (4.0mm), these rods are perfect for tackling thicker steel sections where you need to lay down metal smoothly and efficiently. Whether you are repairing heavy equipment, working on a custom automotive frame, or practicing your pipe welding technique, these rods deliver the performance you need.

What makes the ER70S-2 special? It's all about the "Triple Deoxidizers." If you've ever struggled with porosity (those annoying little bubbles in your weld) because the metal wasn't perfectly clean, this rod is your solution. The added Aluminum, Titanium, and Zirconium in the wire help pull impurities out of the puddle, allowing you to get a solid, crack-resistant weld even if the base metal has a bit of rust or mill scale on it. It's often called the "problem solver" for mild steel TIG welding.

Packaged in a convenient 10lb tube, these cut lengths are easy to handle and store. The 36-inch length is standard for manual TIG welding, giving you plenty of reach. The 5/32" diameter is ideal for higher amperage settings, helping you get good penetration on thicker joints without burning through your filler too quickly. Achieve professional-looking beads with excellent ductility and strength—perfect for everything from structural repairs to artistic metalwork.

Additional Information
Aws Spec:ER70S-2
Diameter:4.0mm (5/32")
Packaging:10 lb Tube
Weld Process:TIG (GTAW)
Grade:S2
Polarity:DC
AWS Classification:ER70S-2
Rod Type:Solid TIG Cut Length
Material Composition:Carbon Steel (Triple Deoxidized)
Shielding Gas Requirement:100% Argon
Tensile Strength:70,000 psi (min)
Welding Position:All Positions
Packaging Description:10 lb tbe
Brand:Generic

INCLUDED

  • 10lb Tube of ER70S-2 Mild Steel TIG Rods (4.0mm / 5/32" diameter)
  • Storage Tube

APPLICATIONS

  • Pipe Welding (Root Pass)
  • Structural Steel Fabrication
  • Power Plant Maintenance
  • Petrochemical Piping
  • Heavy Equipment Repair
  • Automotive Chassis Fabrication
  • General Maintenance and Repair (MRO)

FAQ

ER70S-2 is triple deoxidized with Titanium, Zirconium, and Aluminum, making it better for welding over rust and mill scale and for critical root passes. ER70S-6 has higher Silicon and Manganese for wetting and fluidity but lacks the extra deoxidizers of S-2.

For TIG (GTAW) welding with ER70S-2, use 100% Argon gas. Do not use CO2 or Argon/CO2 mixes, as those are for MIG welding.

No, ER70S-2 is a carbon steel filler metal. Using it on stainless steel will result in contamination, loss of corrosion resistance, and weld failure. Use ER308L or similar for stainless.

These rods are 4.0mm, which is approximately 5/32 of an inch.

Yes, ER70S-2 is the preferred rod for open-root pipe welding on carbon steel due to its ability to form a smooth back bead and its resistance to porosity.

Use DCEN (Direct Current Electrode Negative), also known as Straight Polarity, for TIG welding steel with this rod.

This product comes in a 10lb tube.
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