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Shielding Gases
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Selection of Shielding Gases for GMAW with Short Circuit Transfer
Metal Shielding Gas Advantages
Carbon Steel 75% Argon / 25% CO2 Less than 1/8" thick; high welding speeds without burn-through; minimum distortion and spatter. More than 1/8" thick: minimum spatter; clean weld appearance; good puddle control in vertical and overhead positions.
SteelMIX® Offers less spatter, less distortion and better puddle control than 75% Argon / 25% CO2
CO2 Deeper penetration; faster welding speeds.
Low Alloy Steel 60-70% Helium / 25-35% Argon / 4-5% CO2 Minimum reactivity; excellent toughness; excellent arc stability; wetting characteristics and bead contour; little spatter.
SteelMIX® Extra Out performs all gases on dirty steel. Excellent on mill scale, painted or oily material. Allows higher travel speed for automated applications.
SteelMIX® Fair toughness; excellent arc stability; wetting characteristics and bead contour; little spatter.
Stainless Steel 90% Helium / 7.5% Argon / 2.5% CO2 No effect on corrosion resistance; small hea-affected zone; no undercutting; minimum distortion.
StainMIX 3 Smoother arc with lower hear input and less spatter.




Selection of Shielding Gases for GMAW with Spray Transfer
Metal Shielding Gas Advantages
Aluminum Argon 0 to 1" thick; best metal transfer and arc stability; least spatter. Also for GMAW-Pulse Spray.
AluMIX 1/8 to 1" thick. Better penetration and oxide removal. Much less ozone creation than with straight argon.
25% Argon/75% Helium 1 to 3" thick; higher heat input than straight Argon; improved fusion characteristics with 5XXX series Al-Mg alloys. Over 3" thick; highest heat input; minimizes porosity.
Magnesium Argon Excellent cleaning action.
Carbon Steel. Low Alloy Steel Argon/2-5% Oxygen Improves arc stability; produces a more fluid and controllable weld puddle; good coalescence and bead contour; minimizes undercutting; permits higher speeds than pure Argon. Also for GMAW-Pulse Spray.
SteelMIX® 3 Low-energy mix ideal for thinner gauge material (up to 1/8" thick).
CO2 High-speed mechanized welding; low cost manual welding.
Argon/5% CO2 For faster freezing puddle with GMAW-Pulse Spray.
Stainless Steel Argon /1% Oxygen Improves arc stability; produces a more fluid and controllable weld puddle; good coalescence and bead contour; minimizes undercutting on heavier stainless steels. Also for GMAW-Pulse Spray.
Argon / 2% Oxygen Provides better arc stability, coalescence and welding speed than 1% Oxygen mixture for thinner stainless steel material. Also for GMAW-Pulse Spray
StainMIX Versatile two-component gas for spray and pulse spray.
Copper, Nickel and their alloys Argon Provides good wetting; decreases fluidity of weld metal for thickness up to 1/8”.
Argon/Helium Higher heat inputs of 50 & 75% Helium mixtures offset high heat dissipation of heavier gauges.
Titanium Argon Good arc stability; minimum of weld contamination; inert gas backing is required to prevent air-contamination on back of weld area