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OM-4434 Page 71
15-15. Common MIG Shielding Gases
This is a general chart for common gases and where they are used. Many different combinations (mixtures) of
shielding gases have been developed over the years. The most commonly used shielding gases are listed in the
following table.
Application
Gas
Spray Arc Steel
Short Circuiting
Steel
Spray Arc
Stainless Steel
Short Circuiting
Stainless Steel
Spray Arc
Aluminum
Short Circuiting
Aluminum
Argon All Positions
5
All Positions
Argon + 1% O
2
Flat & Horizontal
5
Fillet
Flat & Horizontal
5
Fillet
Argon + 2% O
2
Flat & Horizontal
5
Fillet
Flat & Horizontal
5
Fillet
Argon + 5% O
2
Flat & Horizontal
5
Fillet
Argon + 8% CO
2
Flat & Horizontal
5
Fillet
All Positions
Argon + 25%
CO
2
Flat & Horizontal
1
Fillet
All Positions All Positions
3
Argon + 50%
CO
2
All Positions
CO
2
Flat & Horizontal
1
Fillet
All Positions
Helium All Positions
2
Argon + Helium All Positions
2
Tri-Mix
4
All Positions
1 Globular Transfer
2 Heavy Thicknesses
3 Single Pass Welding Only
4 90% HE + 7-1/2% AR + 2-1/2% CO
2
5 Also for GMAW-P, All Positions