Common Mig Shielding Gases - Miller Millermatic 140 Owner's Manual

8-16. 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.
Gas
Argon
Argon + 25% CO
2
CO
2
3
Tri-Mix
1 Globular Transfer
2 Single Pass Welding Only
3 90% HE + 7-1/2% AR + 2-1/2% CO
OM-225 311 Page 48
Spray Arc Steel Short Circuiting Steel
1
Flat & Horizontal Fillet
1
Flat & Horizontal Fillet
2
Application
Short Circuiting
Stainless Steel
All Positions All Positions
All Positions
All Positions
Short Circuiting
Aluminum
All Positions
2