TIG welding means Tungsten Inert Gas process. The TIG process uses an electric arc established between a non-consumable tungsten electrode and the part to be welded to generate the heat. Sometimes in TIG welding, a filler metal is used by manually feed it into the weld puddle.


In the TIG welding process, an air or water-cooled torch is used to hold the tungsten electrode. An external shielding gas, typically argon, helium, or a mixture of the two are also required in TIG to protect the molten metal and electrode from atmospheric contamination.


TIG welding is known to produce very high quality welds (dependent on the welder of course). TIG welding also has all-position welding capability and is great for welding very thin metals such as aluminum sheets and metal ducts.