MIG welding

Metal inert gas (MIG) welding is a semi-automatic or automatic gas metal arc welding process in which a continuous and consumable wire electrode and a shielding gas are fed through a welding gun. Reasonable operator proficiency can be achieved with modest training. Since the electrode is continuous, welding speeds are greater in MIG welding than for the other common method shielded metal arc welding, and the smaller arc size makes it easier to make out-of-position welds, such as overhead joints, as would be welded underneath a structure.