Conventional welding methods are not always suitable for joining parts made of stainless steel, copper, titanium, aluminum, and various non-ferrous metals and alloys. Experienced welders often use argon arc welding for these applications. This process is demanding, time-consuming, and specialized.
Argon arc welding (TIG welding) is performed in an inert argon-gas atmosphere, which is why the process has this name. Using argon to join two metals protects the weld from oxidation caused by contact with oxygen in the air. Argon prevents the weld from coming into contact with air. Since argon is 38% heavier than air, it displaces air from the welding zone, fills the working space, and reliably isolates the molten metal from the atmosphere.
The welding process can be manual, semi-automatic, or automatic. Welding modes are classified according to these methods and the type of electrode used. There are two types of electrodes: consumable and non-consumable. The latter includes tungsten electrodes, which can provide a strong and reliable joint even between dissimilar metals.








