MIG MAG Welding

The MIG MAG welding process, or continuous wire welding, is widely utilized for its high productivity and suitability for automated systems.

It is a fusion welding process where the electric arc is struck between the workpiece and a consumable wire electrode. The wire feed device continuously supplies the molten pool (unlike the electrode rod, which must be replaced with a new rod once finished). Gas protection is provided directly to the molten pool by a shielding gas.

The process is classified as MIG (Metal Inert Gas) when using inert gases such as Argon, and MAG (Metal Active Gas) when using active gases like CO2​ or Ar+CO2​ mixtures. Pure Argon is mainly used for welding aluminum, copper, and their alloys (e.g., bronze). ArCO2 mixtures in various percentages are used for all other materials (iron, stainless steel).  In continuous wire welding, depending on how the droplets of filler material detach, it can be classified as short-circuit transfer (short-arc) or spray-arc transfer.