What type of electrode is used in Tungsten Arc Gas Shielded Welding?

In Tungsten Arc Gas Shielded Welding, also known as Tungsten Inert Gas (TIG) welding, a non-consumable tungsten electrode is used. This type of electrode does not melt or get consumed during the welding process; instead, it maintains its integrity while providing a stable arc. The tungsten electrode creates a high-temperature arc that melts the base metal and the filler material, if used, allowing for strong joints to be formed.

Using a non-consumable tungsten electrode is essential in TIG welding because it delivers precise heat control and versatility for welding various materials, including aluminum and stainless steel. The properties of tungsten, such as its high melting point and ability to withstand high temperatures, make it ideal for this application.

Other electrode types listed, like consumable electrodes and bare wire electrodes, are generally used in different welding processes, such as MIG welding, where the electrode itself melts and becomes part of the weld. Graphite electrodes, while used in some high-temperature applications and electric arc furnaces, are not appropriate for TIG welding where the precision of welding thin materials is required. Thus, the use of a non-consumable tungsten electrode is foundational in achieving the desired quality and characteristics in Tungsten Arc Gas Shielded Welding.