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Tungsten inert gas welding

Tungsten inert gas welding or TIG is also known as gas tungsten arc welding (GTAW) or HELIARC, a trade name of Linde.

A tungsten electrode protected by a shielding gas is used to create an arc, a filler rod is then melted by the arc to join the metals.

Unlike most other types of arc welding, the tungsten electrode is not used up by TIG welding.

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