Common Mig Shielding Gases - Miller Bobcat 225 Owner's Manual

14-15. 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.
Gas
Spray Arc Steel
Argon
Flat & Horizontal
Argon + 1% O
2
Fillet
Flat & Horizontal
Argon + 2% O
2
Fillet
Flat & Horizontal
Argon + 5% O
2
Fillet
Flat & Horizontal
Argon + 8% CO
2
Fillet
Argon + 25% Flat & Horizontal
CO Fillet
2
Argon + 50%
CO
2
Flat & Horizontal
CO
2
Fillet
Helium
Argon + Helium
4
Tri-Mix
1 Globular Transfer
2 Heavy Thicknesses
3 Single Pass Welding Only
4 90% HE + 7-1/2% AR + 2-1/2% CO
5 Also for GMAW-P, All Positions
OM-4434 Page 72
Short Circuiting Spray Arc
Steel Stainless Steel
5
Flat & Horizontal
Fillet
5
Flat & Horizontal
Fillet
5
5
All Positions
1
All Positions
All Positions
1
All Positions
2
Application
Short Circuiting
Stainless Steel
All Positions
5
5
3
All Positions
All Positions
All Positions
All Positions
Spray Arc Short Circuiting
Aluminum Aluminum
5
All Positions
2
2