Shielded metal arc welding (SMAW)
Gas metal arc welding (GMAW)
GMAW is commonly known as Metal Inert Gas welding (MIG) or (MAG) Metal Active Gas welding. An electric arc generates a continuous feed of electrodes that are shielded by gas, which is applied separately.
This process requires an electric power supply, an electrode feed-wire unit, and the shielding gas. The wire and gas are fed through the welding torch. The arc length is regulated by maintaining a constant voltage power supply in conjunction with a wire feed speed unit.
This process may be semi-automatic or mechanised using a constant voltage, direct current power source. Alternatively, constant current or alternating current systems can be used. GMAW’s electrode-based system is one of the most efficient welding procedures.
Gas Tungsten Arc Welding (GTAW)
Submerged Arc Welding (SAW)