Gas For Tig Welding Aluminum And Steel. Mixtures of argon and helium are probably the next common and pure helium is generally only used for some specialized GTAW applications. Gas for Tig Welding.
The reason behind this is that the inert gas usage for the TIG welding process protects the actual welding portion. The melting point of aluminum is much lower than that of steel 1221 degrees Fahrenheit for aluminum compared to 2500 degrees for steel. Excellent welds are often produced using pure argon as a shielding gas.
Whilst there are some more exotic and expensive mixes available most welders will find pure Argon to be ideal for Tig Welding most metals.
In TIG welding a non-consumable tungsten electrode is used because it has the highest melting temperature among pure metals at 3422 C 6192 F and therefore doesnt contaminate the weld by introducing traces of the electrodes element. The melting point of aluminum is much lower than that of steel 1221 degrees Fahrenheit for aluminum compared to 2500 degrees for steel. In TIG welding a non-consumable tungsten electrode is used because it has the highest melting temperature among pure metals at 3422 C 6192 F and therefore doesnt contaminate the weld by introducing traces of the electrodes element. Gas for Tig Welding is to protect the weld pool from Oxygen and to Cool the Torch unless a.