AFM ER70S-2 is used primarily for single-pass welding of killed, semi-killed, and rimmed steels, but may also be used for some multipass applications. Because of the added deoxidants, AFM ER70S-2 can be used for welding steels that have a rusty or dirty surface, with a possible sacrifice of weld quality depending on the condition of the surface. Typical specifications for these steels are ASTM A36, A285-C, A515-55 and A516-70, which have UNS numbers K02600, K02801, K02001, and K02700, respectively

American Filler Metal 70S-212536 Low Alloy Steel Welding Wire, Diameter: 1/8 Inch, Length: 36 Inch, AWS Class: AWS A5.18: ER70S-2, Tensile Strength: 80000 psi, Yield Strength: 65000 psi, Elongation in 2" (%): 25%, Charpy V-Notch: 28 ft.-lb. At -20 deg F, Welding Process: TIG (GTAW), Weld Metal Composition: 0.07% Carbon (C), 0.90 - 1.40% Manganese (Mn), 0.40 - 0.70% Silicon (Si), 0.025% Phosphorus (P), 0.035% Sulphur (S), 0.50% Nickel (Ni), 0.50% Chromium (Cr), 0.50% Molybdenum (Mo), 0.50% Vanadium (V), 0.50% Copper (Cu), 0.05 - 0.15% Titanium (Ti), 0.02 - 0.12% Zirconium (Zr), 0.05 - 0.15% Aluminum (Al), Applicable Materials: ASTM A36, A285-C, A515-55, A516-70 Steel