PRODUCT INFORMATION Category: Steel Wires Alloy: WW70S-3 Class: ER70S-3 Description: Type ER70S-3 is a welding wire for tig and mig welding applications. Mig welding conducted with Carbon Dioxide or Argon + Co2 or Argon +2% Oxygen shielding gas. For tig welding use 100% Argon. Chemical Composition C 0.06-0.15 Mn 0.90-1.40 Si 0.45-0.75 P 0.025 max S 0.035 max Cu 0.50 max (includes coating or residual copper)