Metal Inert Gas (MIG) Welding
This type of welding process consists of passing a bare metal filler wire of the same material being welded through a portable torch unit in combination with shielding gas. The welding wire takes up the current supplied by a standard power source, and then the contact creates an arc, which takes over the welding. Because the wire is fed from the machine to the work-piece, the wire acts as a continuous consumable electrode, thereby requiring fewer starts and stops than others.
Tungsten Inert Gas (TIG) Welding
The TIG welding process uses a non-consumable tungsten electrode and shielding gas, which protects the weld area from any form of contamination. Even TIG welding can be performed in all positions. TIG’s concentrated heat and precise arc control make it possible to weld thin material even as thin as 0.01 inch.
This process involves usage of a consumable flux-coated electrode, which contains mild steel, stainless steel, cast iron, and other alloys. These electrodes are selected depending upon the base material to be welded. Equipment required includes power source, the electrode holder and the working clamp.