Shielding Gas Considerations

Shielding Gas Considerations for Aufhauser Solid Stainless Steel Cut Lengths and Spooled Wires

GTAW (TIG) - Argon is suggested for thickness up to approximately 1/2". For thicker sections, argon-helium mixtures or pure helium may be used for deeper penetration. Argon-hydrogen mixtures are occasionally used to improve bead shape and wettability.

GMAW (MIG), Spray Transfer - 99% Argon/1% oxygen is predominantly used. This mixture improves arc stability; produces a more fluid and controllable weld puddle with good bead contour. Undercutting is minimized on heavier sections. 98% Argon/2% oxygen provides better arc stability and welding speed than the 1% oxygen mixture for thinner stainless steel materials.

GMAW (MIG), Short Circulating Transfer - 90% Helium + 7.5% argon + 2.5% CO2 has no effect on corrosion resistance; provides small heat-affected zone; no undercutting; and minimum distortion.

See Shielding Gas Guide for other details


 

300 Series Stainless Steel GMA (MIG) Welding Parameters

Short Circuit Transfer:
Electrode
Diameter (inches)
Welding Current,
Amperage
Arc
Voltage
Wire Feed
Speed (IPM)
0.030 60 - 125 17 - 22 150 - 430
0.035 75 - 160 17 - 22 120 - 400
0.045 100 - 200 17 - 22 100 - 240

 

Spray Transfer:
Electrode
Diameter (inches)
Welding Current,
Amperage
Arc
Voltage
Wire Feed
Speed (IPM)
0.030 160 - 225 24 - 28 440 - 650
0.035 180 - 300 24 - 29 430 - 500
0.045 200 - 450 24 - 30 220 - 400
1/16 220 - 500 24 - 32 110 - 210
3/32 250 - 600 24 - 32 50 - 80