TIG Welding (GTAW)

TIG welding, also known as Gas Tungsten Arc Welding (GTAW), is a welding technique that uses a non-consumable tungsten electrode and a shielding gas to protect the weld from contaminants. TIG welding is commonly used for welding thin materials and is ideal for precision welding applications.

Gas tungsten arc welding (GTAW) is a gas shielded welding method that uses pure tungsten or activated tungsten electrodes and inert gas - argon as the shielding gas.
Tungsten arc welding uses a tungsten needle as the electrode, while consumable argon arc welding uses a welding wire as the electrode. Tungsten arc welding is a type of argon arc welding.

Argon arc welding is divided into tungsten arc welding and consumable argon arc welding according to the electrode material. Non-conductive gas shielded welding (abbreviated as TIG or GTAW) is also called tungsten arc welding or tungsten inert gas shielded welding. It is a gas shielded welding method that uses pure tungsten or activated tungsten electrodes and inert gas - argon as the shielding gas.

The tungsten rod electrode only acts as a conductor and does not melt. After power is turned on, an arc is generated between the tungsten electrode and the workpiece.

When it comes to selecting a rod for TIG welding, the most important factor to consider is the type of material you are welding. 

For mild steel, a ER70S-2 rod is a good choice. For stainless steel, a ER308 or ER316 rod is recommended, and for aluminum, a ER4043 or ER5356 rod is ideal.