GTAW (Gas Tungsten Arc Welding – TIG) welding utilizes a non-consumable electrode to deliver an electrical current to the welding arc. The resulting heat melts the metal being welded into a puddle. The tungsten electrode and puddle receive protection from weld-ruining atmospheric menaces via an inert gas, typically argon. In most cases, a hand-held filler rod strengthens and reinforces the weld. However, some thinner materials don’t require a filler metal and may be fused.
GMAW (Gas Metal Arc Welding – MIG) welding utilizes a spooled wire electrode to feed electricity into the work and melt the base metal. The spooled wire electrode also acts as a filler metal, strengthening the weld. The electrode feeds out of the welding machine at a rate predetermined by the welding process and procedure. The wire feed speed and voltage and shielding gases are adjustable to obtain the desired weld. They are customized according to different materials and thickness.
FCAW (Flux-Cored Arc Welding) is a semi-automatic arc welding process that uses a continuously fed tubular wire electrode filled with flux. It offers high welding speeds, deep penetration, and portability making it popular for heavy construction, outdoor fabrication, and structural steel work.