(Also See Gas Metal Arc Welding) An arc welding process which joins metals by heating them with an arc. The arc is between a continuously fed filler metal (consumable) electrode and the work piece. Externally supplied gas or gas mixtures provide shielding. GMAW is commonly used to join carbon / stainless steel, aluminum, copper, magnesium, nickel alloys in all positions and material thicknesses. Transfer modes within GMAW include short circuit, globular, spray and recently surface tension. Shielding gases include argon, carbon dioxide, helium mixes and many other specialty gasses. Other names for GMAW are MIG and wirefeed welding. GMAW is generally a portable process with eye, skin and face protection required.