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