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**ER70S-A1**
Description
a heat-resistant steel welding wire containing 0.5% Mo. This wire features excellent welding usability: good fluidity of the molten pool and beautiful bead appearance. The weld metal has excellent hot strength properties.
Applications
It is used for welding C-Mo steel boiler pipes operating at temperatures up to 510℃, such as 15Mo steel. It can also be used for welding general low-alloy high-strength steels.
Welding Wire Chemical Composition(Mass Fraction,%)
Element |
Standard Value |
Typical Value |
C |
0.080 |
|
Mn |
1.29 |
|
Si |
0.30-0.70 |
0.41 |
S |
0.007 |
|
P |
0.011 |
|
Cr |
0.40-0.65 |
0.024 |
Mo |
0.051 |
|
Cu |
0.20 |
Weld Metal Mechanical Properties
Property |
Standard Value |
Typical Value1 |
Typical Value 2 |
Tensile Strength(Rm,Mpa) |
>=515 |
613 |
626 |
Yield Strength(ReL,Mpa) |
>=400 |
516 |
534 |
Elongation After Fracture(A,%) |
>=19 |
23 |
25 |
Impact Toughness(-30℃，KV2,J） |
>=27 |
274 |
150 |
Precautions & Operating Guidelines
1. Shielding Gas Flow: 9-14 L/min for welding current of 100-200A; 14-18 L/min for 200-300A. Tungsten electrode stick-out should be 3-5mm, arc length 1-3mm. Wind speed should be limited to ≤ 1.0m/s. Argon back shielding is recommended for the root of the weld.
2. During welding, the heat input directly affects the mechanical properties of the weld metal and should be closely monitored.
3. Before welding, thoroughly remove oil, rust, moisture and other contaminants from the welding area.
4. The above welding guidelines and recommendations are for reference only. Before using this wire for formal production welding, users shall conduct procedure qualification based on their own welding conditions.
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