What is the function of argon in tig welding?

Argon shields the tungsten electrode and the molten metal from the atmosphere. The atmosphere would cause porosity if the weld metal was exposed to it. Other gases can also be used for TIG welding. The first gas too be used was helium, but it is more rare and expensive than argon. read more

Argon shields the tungsten electrode and the molten metal from the atmosphere. The atmosphere would cause porosity if the weld metal was exposed to it. Other gases can also be used for TIG welding. The first gas too be used was helium, but it is more rare and expensive than argon. Mixes of gases are also used some times. read more

Gas tungsten arc welding (GTAW), also known as tungsten inert gas (TIG) welding, is an arc welding process that uses a non-consumable tungsten electrode to produce the weld. The weld area and electrode is protected from oxidation or other atmospheric contamination by an inert shielding gas (argon or helium), and a filler metal is normally used, though some welds, known as autogenous welds, do not require it. read more

First off, let's define the TIG welding process and provide some history. TIG stands for Tungsten Inert Gas and is technically called Gas Tungsten Arc Welding or GTAW. The process uses a non-consumable tungsten electrode that delivers the current to the welding arc. read more