Definitions for "GAS METAL ARC WELDING"
Keywords:  mig, weld, inert, gmaw, coalescence
Welding which is done by using an external shielding gas to weld the metals together with the heat generated by the electric arc that is produced between a consumable electrode and the metal being welded. Deep penetration of the weld, along with rapid deposits of weld metal are provided by this process.
An arc welding process that produces coalescence of metals by heating them with an arc between a continuous filler metal (consumable) electrode and the work. Shielding is obtained entirely from an externally supplied gas or gas mixture. Some variations of this process are called MIG (Metal Inert Gas) Or CO2 welding, nonpreferred terms.
MIG welding is undertaken with direct current electricity, with argon or argon/helium mixes as the shielding gas. The welding speed of MIG is faster than for the TIG method. The speed of welding means that the size of the heat agitated area in the parent metal is smaller compared to other welding methods.