ER70S-3 TIG
AWS A5.18 ER70S-3
ASME SFA 5.18 ER70S-3
ER70S-3 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-3 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.
Applications:
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 (%)
- | ER70S-3 | AWS Spec |
|---|---|---|
C | 0.100 | 0.06 - 0.15 |
Mn | 1.000 | 0.90-1.40 |
Si | 0.550 | 0.45-0.75 |
P | 0.012 | 0.025 max |
S | 0.012 | 0.035 max |
Typical mechanical properties of weld metal (C02 shielding gas)
- | AWS Spec | ER70S-3 |
|---|---|---|
Yield strength (psi) | 60,000 min | 62,400 |
Ultimate tensile strength (psi) | 72,000 min | 75,500 |
Elongation in 2" (%) | 22 min | 30.7 |
Charpy V-notch at 0 F (ft. lbs) | 20 min | 66 |
Reduction of area | - | 59 |
Average Brinell Hardness | - | 130 |