TTU938 - ER70S-2 Mild Steel TIG Welding Rod 3.2mm 1lb Tube

Premium ER70S-2 Mild Steel TIG Welding Rods for Superior Deoxidation

The ER70S-2 3.2mm TIG Rod is a high-grade mild steel welding wire designed specifically for the Gas Tungsten Arc Welding (GTAW) process. Distinguished by its unique chemical composition, this rod is classified as a "triple deoxidized" wire. It contains specific additions of Zirconium (Zr), Titanium (Ti), and Aluminum (Al) alongside the standard Silicon and Manganese found in other mild steel wires. This potent combination makes the ER70S-2 exceptionally capable of welding over mill scale, rust, and other surface contaminants that would typically cause porosity in standard ER70S-3 or ER70S-6 applications.

For industrial fabricators and maintenance professionals, the ER70S-2 is the go-to choice when base metal preparation cannot be perfect. While it produces a slightly more sluggish puddle compared to the high-silicon S-6 wires, the metallurgical benefits in terms of porosity control are unmatched. It produces X-ray quality welds with high tensile strength, making it suitable for critical piping, structural steel, and pressure vessel applications where integrity is paramount.

This 1lb tube packaging offers a convenient solution for small-scale projects, repairs, or testing without the commitment of bulk purchasing. The 3.2mm (1/8 inch) diameter is ideal for welding medium-to-thick sections of mild and low-alloy steels, providing sufficient filler metal deposition rates while maintaining arc stability. The rods are copper-coated to prevent oxidation during storage and to ensure excellent electrical conductivity during the welding process.

Technical Specifications and Metallurgy

• AWS Classification: A5.18 ER70S-2
• Deoxidizers: Al, Ti, Zr (Triple Deoxidized)
• Shielding Gas: 100% Argon
• Current: DCEN (Direct Current Electrode Negative)
• Tensile Strength: Typically 70,000+ PSI (depending on dilution and gas)

When using this rod, operators should ensure proper gas coverage and utilize a DCEN setup for optimal penetration and bead profile. The triple deoxidizer formulation not only scavenges oxygen but also helps in refining the grain structure of the weld metal, leading to improved toughness. It is widely used in the welding of killed, semi-killed, and rimmed steels.