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Gas Tungsten Arc Welding

From Joining Technologies / Laser Joining Technology

The development of the GTAW process was accelerated early in 1940. Initially the process was called 'Heliarc', because Helium was used for the shielding gas. Later when argon was available the process was renamed tungsten inert gas or 'TIG'. Now, it is generally and preferably called gas tungsten arc welding (GTAW), as gases other than argon and helium, which are inert, can be mixed with them. Hydrogen, for example, may be included for its special benefits.

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