Gas metal-arc welding (GMAW), also known as metal inert gas (MIG) welding, utilizes an inert shielding gas and a consumable wire fed into a weld arc. It is mainly suitable for welding thin sheets of ferrous and nonferrous metals due to the lower temperatures generated. The process is user-friendly, economical, and results in higher productivity compared to submerged-arc welding.

1. Gas Metal-arc Welding
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Gas metal-arc welding (GMAW) also called as metal inert-gas (MIG) welding, In Gas metal-arc welding
process the weld area is shielded by an effectively inert atmosphere of argon, helium, carbon dioxide
or various other gas mixtures. The consumable bare wire is fed automatically through a nozzle into the
Weld arc by a wire-feed drive motor. In addition to using inert shielding gases, de-oxidizers usually are
present in the electrode metal itself in order to prevent oxidation.
Basic equipment used in gas metal arc welding operation
Gas Metal Arc Welding process, formerly known as Metal Inert Gas
The temperatures generated in Gas metal-arc welding are low, GMAW method is suitable only for thin
sheets and sections of less than 6 mm, otherwise incomplete fusion may occur. GMAW operation is
easy to perform is commonly used for welding ferrous metals in thin sections. Pulsed-arc systems are
used for thin ferrous and nonferrous metals. GMAW process is used for welding most ferrous and
nonferrous metals and is used extensively in the metal-fabrication industry. Because of the relatively
simple nature of the process, the training of operators is easy. This process is versatile, quick,
economical and welding productivity is double that of the Submerged-arc Welding process.