ER70s-2 TIG
AWS A5.18 ER70S-2
ASME SFA 5.18 ER70S-2
ER70S-2 is a multiple deoxidized wire containing small amounts of zirconium, titanium and aluminum in addition to the manganese and silicon deoxidizers characteristic of the steel wire group. This wire may be used for MIG or TIG welding on all grades of mild and carbon steels, producing superior quality welds with minimal porosity even
over rust and mill scale. ER70S-2 is popular for out of position welding with small diameter wires utilizing the short-circuiting arc type transfer. MIG welding may he accomplished using CO2, Argon-Oxygen mixtures or mixtures of the two.
Applications:
Pipes, offshore drilling rigs, structural steel work, etc.
TYPICAL WIRE CHEMISTRY (%)
- | ER70S-2 | AWS Spec |
|---|---|---|
C | 0.050 | 0.07 max. |
Mn | 1.250 | 0.90-1.40 |
Si | 0.500 | 0.40-0.70 |
P | 0.012 | 0.025 max |
S | 0.012 | 0.035 max |
Al | 0.100 | 0.05-0.15 |
Zr | 0.090 | 0.02-0.12 |
Ti | 0.100 | 0.05-0.15 |
Typical mechanical properties of weld metal (C02 shielding gas)
- | AWS Spec | ER70S-2 |
|---|---|---|
Yield strength (psi) | 60,000 min | 71,000 |
Ultimate tensile strength (psi) | 72,000 min | 83,000 |
Elongation in 2" (%) | 22 min | 27.5 |
Charpy V-notch at 0 F (ft. lbs) | 20 min | 30 |
Reduction of area | - | 58 |
Average Brinell Hardness | - | 140 |