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

Spray Arc

Short Circuiting

Spray Arc

Short Circuiting

 

Steel

Stainless Steel

Stainless Steel

Aluminum

Aluminum

 

 

 

 

 

 

 

 

 

Argon

 

 

 

 

All Positions5

All Positions

Argon + 1% O2

Flat & Horizontal5

 

Flat & Horizontal5

 

 

 

Fillet

 

Fillet

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Argon + 2% O2

Flat & Horizontal5

 

Flat & Horizontal5

 

 

 

Fillet

 

Fillet

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Argon + 5% O2

Flat & Horizontal5

 

 

 

 

 

Fillet

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Argon + 8% CO2

Flat & Horizontal5

All Positions

 

 

 

 

Fillet

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Argon + 25%

Flat & Horizontal1

All Positions

 

All Positions3

 

 

CO2

Fillet

 

 

 

 

 

 

 

 

Argon + 50%

 

All Positions

 

 

 

 

CO2

 

 

 

 

 

 

 

 

 

 

 

CO2

Flat & Horizontal1

All Positions

 

 

 

 

Fillet

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Helium

 

 

 

 

All Positions2

 

Argon + Helium

 

 

 

 

All Positions2

 

Tri-Mix4

 

 

 

All Positions

 

 

1Globular Transfer

2Heavy Thicknesses

3Single Pass Welding Only

490% HE + 7-1/2% AR + 2-1/2% CO2

5Also for GMAW-P, All Positions

OM-4434 Page 71

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Image 75
Miller Electric Bobcat 225 manual Common MIG Shielding Gases, Application, Fillet