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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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