Argon Gas For Tig Welding Aluminum. Pure argon is the most popular shielding gas and is often used for both gas metal arc and gas tungsten arc welding of aluminum. TIG welders typically use pure argon shielding gas especially for metals that are ½ thick or less.
Mixtures of argon and helium are probably the next common and pure helium is generally only used for some specialized GTAW applications. An argonHelium mix the most common being 25 helium is ideal for tig or mig welding aluminum over 14- 50 he for over 12 and 75 he for over 1 inch. But the gas needs to be completely inert.
Mixtures of argon and helium are probably the next common and pure helium is generally only used for some specialized GTAW applications.
Pure argon is the most popular shielding gas and is often used for both gas metal arc and gas tungsten arc welding of aluminum. For more suitable MIG gases see our range here. The most commonly used Inert gas is Argon. Excellent welds are often produced using pure argon as a shielding gas.