What Gas Should You Use for TIG Welding?
For TIG welding, the most commonly used gas is pure argon (100% argon).
Here’s why:
Shielding – Argon creates a stable, inert atmosphere around the weld, preventing contamination from oxygen, nitrogen, and moisture in the air.
Arc Stability – It provides a smooth, stable arc that's easy to control.
Versatility – Works well for almost all TIG applications, including steel, stainless steel, and aluminum.
Other options (special cases):
Argon + Helium – Increases heat input for thicker metals or faster travel speeds.
Argon + Hydrogen – Sometimes used for stainless steel to improve weld bead appearance, but not recommended for aluminum (risk of porosity).
❌ Avoid using CO₂ or Argon/CO₂ mixes (common in MIG welding) — they cause oxidation and poor weld quality in TIG.
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