Gas Tungsten Arc Welding (TIG)

In tungsten inert gas arc welding (TIG), an arc is struck between a nonconsumable tungsten electrode and the workpiece.  Gas shielding (to protect the molten metal from contamination) and constant amperage are supplied during the welding operation.

Process Characteristics

Uses nonconsumable tungsten electrode
Uses shielding gases (Ar, He, or CO2)
Produces very high quality welds
Produces no slag or spatter
Is readily applied to thin materials

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Information provided is from Manufacturing Processes Reference Guide by Robert H. Todd, Dell K. Allen, and Leo Alting.--1st ed. Published by Industrial Press Inc., 1994.