TIG stands for Tungsten Inert Gas and is technically called Gas Tungsten Arc Welding or GTAW. The process uses a non-consumable tungsten electrode that delivers the current to the welding arc. The tungsten and weld puddle are protected and cooled with an inert gas, typically argon. TIG welding is similar to oxy-acetylene welding in that you use a filler material for build-up or reinforcement. TIG welding is often referred to as Heli-arc welding, originating from an early Hobart “Heli-Arc” machine. The name comes from using helium gas as a shield around the electric arc. TIG welding was developed in the 1930s and was used during World War 2 as the preferred way to weld many aircraft parts. Previously, some alloy steels and aluminum had to be welded with a torch, something that required considerable skill and time.
In race car fabrication, we use the TIG welding process for aluminum and 4130 chrome-moly steel. If you are going to be welding on either of these materials, you need a quality TIG welder. Performance Design offers products that will accommodate anyone from a home hobbyist to an advanced user.