AWS A5.28: ER70S-G

AWS A5.28: ER70S-G

Used for welding pressure vessels such as high temperature separators and recycle hydrogen liquid separator etc. and also used for welding oil pipelines steel structures like 16MnR(HIC) etc.

AWS A5.28: ER70S-G

H09MnSH(A) is a special gas shielded welding wire for super-low S and P copper-coated hydrogen-resistant steel. It has excellent welding process performance, good fluidity of molten metal, and beautiful weld bead formation. The deposited metal has excellent anti-HIC, SCC resistance, as well as good low-temperature impact toughness and crack resistance.

Notes on usage:

1. Gas flow rate: 9 - 14 L/min at current ranging from 100 to 200 A, 14 - 18 L/min at current ranging from 200 to 300 A; tungsten electrode extension length approximately 3 - 5 mm, arc length 1 - 3 mm; wind speed limit ≤ 1.0 m/s; it is recommended to supply argon gas protection on the back side of the welding area.
2. During the welding process, the size of the welding line energy directly affects the mechanical properties of the deposited metal, and more attention should be paid to it.
3. Before welding, all surface impurities such as oil, rust, and moisture in the welding area should be strictly removed.
4. The above welding points and suggestions are for reference only. Users should conduct process evaluation based on their own welding characteristics before applying the welding wire to the formal product welding.