Gas Metal Arc Welding (MIG)

Gas metal arc welding, commonly referred to as MIG, is an electric arc welding process in which an arc is struck between a consumable wire electrode and a workpiece.  Shielding is provided by an inert gas, hence MIG for metal inert gas.

Process Characteristics

Uses a consumable wire electrode
Uses shielding gas
Results in a uniform weld bead
Produced a slag-free weld bead
Is commonly used for automatic welding

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Information provided is from Manufacturing Processes Reference Guide by Robert H. Todd, Dell K. Allen, and Leo Alting.--1st ed. Published by Industrial Press Inc., 1994.