I assume you are using either spray mode or pulse mode transfer, SG-AO-2% should work. You can also try SG-AC-5%. Increasing the percentage of oxygen or carbon dioxide in the gas mix will reduce the manganese, silicon, or other elements used as deoxidizers. This may alter the mechanical properties. Therefore, the procedure should be qualified to establish the mechanical and chemical properties. Once qualified, the welding procedure should be followed.
Best regards - Al
We had our best luck using a triple gas 75Co2-22Argon-2oxygen for welding t22 material in the short arc mode. Very little spatter, nice smooth welds, and excellent pentrtation on light material. (.125)
By -
Date 01-06-2006 21:39
For spray mode of transfer of low-alloy steels, 98%Ar-2%oxygen is recommended. This gas minimizes undercutting and provides good toughness.
For short-Arc transfer there are 2 gas shielding recommendations. The first is 70%He-25%Ar-5%CO2. This gas gives minimum reactivity, excellent toughness, excellent arc stability, wetting characteristics and bead contour, and little spatter.
The other gas is good ole 75%Ar-25%CO2. This gas gives fair toughness, excellent arc stability, wetting characteristics and bead contour, and little spatter.
