Standard MIG/MAG Welding Gases
Air Products offers a full range of standard shielding gas mixtures for the MIG / MAG welding of all common material types.
Our standard gases are available in traditional cylinder sizes at 200 bar and 230 bar cylinder pressure. Further information on cylinder contents, pressures and valve outlet connections can be found on the Welding and Cutting Gases Cylinder Identification sheet.
Standard gases are named in accordance with their chemical composition
| Coogar | argon, carbon dioxide, oxygen | [Ar, C02, 02 ] |
| Weldap | argon, carbon dioxide | [Ar, C02] |
| Prodarc | argon, oxygen | [Ar, 02] |
| Astec | argon, helium, carbon dioxide | [Ar, He, C02] |
| Astec | argon, helium | [Ar, He] |
| [Note where x = a number between 0 and 9] Gas Selection |
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| Material |
Solid Metal cored wires Up to 6mm thick |
Flux cored wires All thickness |
|
| Carbon and low alloy steels |
Coogar SG
|
Coogar SG
|
Weldap 20
|
|
Coogar 5
|
Coogar 20
|
Coogar SG
|
|
|
Weldap 8
|
Prodarc 5
|
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|
Prodarc 2
|
Prodarc 2
|
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|
Prodarc 5
|
Prodarc 5
|
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| Stainless steels |
Astec S5*
|
Astec S3
|
Weldap 20
|
|
Astec S3
|
Weldap 2
|
Coogar SG
|
|
|
Weldap 2
|
Prodarc 2
|
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|
Prodarc 2
|
Prodarc 2
|
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| Aluminium and alloys |
Astec 30
|
Astec 75
|
Not applicable
|
|
argon
|
Astec 50
|
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| * Can be used on all thickness’ but for dip transfer only |
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aboveMIG (metal inert gas) and MAG (metal active gas) welding are widely used wherever medium and high fusion rates are required.
Both techniques use a DC arc burning freely between the workpiece and a wire electrode, which functions simultaneously as a power carrier and a source of filler metal.
A protective gas envelope shields the arc, the drop transfer process and the melt from the atmosphere.
For MIG welding, the gas is inert: argon or an argon-helium mix. MAG welding uses a mixture of argon with an active gas such as oxygen, CO2 or both.