Shielding gas

Pure argon shielding gas

A common inert shielding choice for TIG and aluminium MIG.

Classification
Inert shielding gas: Ar
Processes
TIG (GTAW) · Aluminium MIG (GMAW)
Materials
Steel — TIG · Stainless steel — TIG · Aluminium · Other compatible nonferrous metals

How to choose it

Order the purity grade required by the procedure and use the correct regulator. TIG shielding and any root purge must be planned for the actual joint.

Limits and product details

Do not assume pure argon is the normal gas for solid-wire steel MAG. Welding gas is not breathable; leaks can displace oxygen.

Additional details

Composition
Argon without an intentionally added active component
TIG context
Linde identifies argon as a common TIG shielding gas
Aluminium context
Linde lists argon for TIG and MIG aluminium welding
Safety
Use ventilation and the cylinder supplier's safety instructions

References

Information checked 2026-10-14.

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