What type of electrode is used in GTAW?

In Gas Tungsten Arc Welding (GTAW), a non-consumable tungsten electrode is used. The purpose of this electrode is to provide the arc necessary for the welding process. Tungsten is selected due to its high melting point and ability to maintain a stable arc during welding. The electrode does not melt during the process, which allows it to be reused for multiple welds, enhancing efficiency and cost-effectiveness.

The non-consumable nature of the tungsten electrode means that it serves primarily to create the arc and transfer heat to the workpiece, while filler material may be added manually if needed. This setup allows for precise control over the heat and the weld pool, which is particularly crucial for welding thin or intricate materials where a delicate approach is required. This characteristic of the tungsten electrode distinguishes GTAW from other welding processes that utilize consumable electrodes.