Browse By Letter

Search engineering dictionary:


Mag Welding

MAG (Metal Active Gas) welding is a metal joining process. In contrast to MIG (Metal Inert Gas) welding, MAG welding uses carbon dioxide or oxygen as a shielding gas instead of argon, although the two terms are often used interchangeably. Direct Current is applied to a consumable electrode, spool fed at a controlled rate through the welding gun. This creates an arc between the electrode and the workpiece. This arc provides the thermal energy necessary to melt the surrounding area, creating a weld pool that solidifies upon removal of the arc to fuse the metal together. Shielding gas is applied through the gun and surrounds the electrode and immediate area to prevent undesirable oxidation of the molten metal with the atmosphere. MAG welding is a versatile process and can be used to effectively join a variety of metal alloys. It requires only limited skill to master when compared to other welding techniques and adapts easily to automation.