Description:
ER70S-A1 is a copper-coated wire for use with the MIG/MAG process, which deposits a 5.5% Mo type weld metal. It is primarily intended for welding similar composition steels, used where creep rupture strength and ductility at service temperatures up to 550° is required, e.g. DIN 15 Mo3, BS 3059 Grade 243 & ASTM A335 Grade P1. The Mo content confers some resistance to hydrogen attack in chemical process plant applications.
ER70S-A1 is also suitable for ordinary C-Mn steels when higher tensile strength weld metal is required. Preheat and interpass temperature of 100-150° is recommended. Stress relief at 620°.
Welding Current: DC+
Wire Composition, wt.%
| |
C |
Si |
Mn |
P |
S |
Mo |
| Min |
0,08 |
0,50 |
0,90 |
|
|
0,40 |
| Typical |
0,10 |
0,60 |
1,10 |
0,015 |
0,01 |
0,50 |
| Max |
0,12 |
0,80 |
1,30 |
0,02 |
0,02 |
0,60 |
Shielding Gas:
C1, 100% CO2, 7-12 l/min.
M21, 80% Ar + 20% CO2, 7-12 l/min.