AWS A5.18 ER70S-4
ASME SFA 5.18 ER70S-4
ER70S-4 is a silicon and manganese deoxidized wire used for mild and low alloy steel general purpose fabrication. A well balanced silicon and
manganese content permits its use with CO2, Argon-Oxygen mixtures, or mixtures of the two. This wire may be used for short-circuiting arc (dip-transfer), buried arc, as well as spray transfer arc processes. ER70S-4 produces quality welds with rimmed steels, better welds on semi-killed
steels and excellent welds on killed steels. It yields an almost slag-free deposit which does not require cleaning for many applications thereby
providing low plate preparation costs, good bead appearance and welder satisfaction.
Automobile frames, earthmoving and farm equipment, sheet metal, ships and barges, railcars, trailers, ornamental iron, metal furniture, storage bins and general fabrications.
TYPICAL WIRE CHEMISTRY (%)
0.06 - 0.15
Typical mechanical properties of weld metal (C02 shielding gas)
Yield strength (psi)
Ultimate tensile strength (psi)
Elongation in 2" (%)
Charpy V-notch at 0 F (ft. lbs)
Reduction of area
Average Brinell Hardness