MIG Welding (GMAW or Gas Metal Arc Welding) - Airgas.com

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MIG Welding
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MIG Welding (GMAW or Gas Metal Arc Welding) — An arc welding process which joins metals by heating them with an arc. The arc is between a continuously fed filler metal (consumable) electrode and the workpiece. Externally supplied gas or gas mixtures provide shielding. Common MIG welding is also referred to as short circuit transfer. Metal is deposited only when the wire actually touches the work. No metal is transferred across the arc. Another method of MIG welding, spray transfer moves a stream of tiny molten droplets across the arc from the electrode to the weld puddle. Consumables: contact tips, shielding gas, welding wire.

MIG welding, also called GMAW, extrudes a metal wire electrode from a gun held by the welder. Power is applied to the gun by a power supply that attempts to regulate voltage at a preset level set by the welding operator. The gun also carries a shielding gas to the nozzle of the gun. A trigger on the gun turns on the gas via a solenoid in the power supply and engages the contactor, also in the power supply. Current flows down the gun through the arc and back to the power supply via the ground clamp. This process has become very popular in the last 40 years because of its speed and ease of use.

MIG and flux-cored welding guide (PDF)
MIG Aluminum: Typical operating procedures for filler and lap welding, aluminum welding parameters charts.

MIG Wire Charts: Wire type selection guide, recommended shielding gases, and welding wire feed speeds.

MIG (Solid Core) Welding Calculator : Courtesy of Miller Electric Mfg. Co www.millerwelds.com

Flux Cored Welding Calculator: Courtesy of Miller Electric Mfg. Co. www.millerwelds.com

MIG Online Training: Courtesy of Miller Electric Mfg. Co. www.millerwelds.com

Catalog and Capabilities
Airgas sells MIG welders and MIG welding supplies. We carry Miller MIG welders and Lincoln MIG welders. MIG welding supplies are, also, available, including MIG welding wire, welder gloves, and welding helmets. Shielding gases for MIG welding are available at our stores.

MIG Welders

Welding Filler Metals: Including MIG Wire.

Welding Support Equipment and Supplies: Electrodes, TIG Torches, MIG and TIG guns, MIG consumables, welding blankets, tungsten, and more...

MIG Welding Gloves