Solid Wires for GMAW of Carbon Steel

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	—	—	—	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-	—	—	—	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.