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MIG Welding
Solid Wires for GMAW of Carbon Steel per AWS A5.18
Classification
Composition
Characteristics
Applications
C Mn Si Ti Zr Al
ER70S-2
00.7
0.90-
1.40
0.40-
0.70
0.05-
0.15
0.02-
0.12
0.15-
0.15
Contains Ti, Zr, Al deoxidants in killed, semi-killed, and rimmed steels. Use on rusted, dirty steel; Ar-O2, CO2, Ar-CO2 shielding. For out-of-position short-circuit transfer. Structural steelwork, pipe offshore platforms. Automobile frames.
ER70S-3
0.06-
0.15
0.90-
1.40
0.45-
0.70
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For single-pass welds, multipass on killed or semikilled steel. CO2, Ar-O2 shielding. Small diameters for out-of-position welding, short-circuit transfer with CO2, Ar-CO2 shielding. High heat input with CO2, degrades mechanical properties. Weld puddle more fluid than with ER70S-2, for better wetting, flatter bead. General-purpose fabrication, heavy equipment, metal furniture, automotive frames, pipe and vessel root passes, hvac ductwork.
ER70S-6
0.07-
1.40-
0.80-
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Highest Mn-Si content, for high-current welding with CO2 of killed, semikilled, rimmed steels, moderate surface scale. Welds out-of-position, short-circuit transfer. Smooth welds on sheet metal. Good for poor fitups. Short-arc with CO2 or Ar-CO2. Structural steel work, tanks, heavy equipment.
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