Applications:

MIG welding provides a method of welding stainless steels at high speeds, since it is a semi-automatic procedure with high arc times and deposition rates. Flux or slag is completely absent. This minimises cleaning and finishing time and gives consistent weld-metal chemistry.

Though MIG procedure is applicable to various Cu alloys, it is preferred for the welding of silicon bronzes , aluminium bronzes,  and copper nickles in section thicknesses greater than 3 mm. For lower thicknesses, the TIG procedure is preferred.

MIG welding might be used for deoxidised coppers to obtain the same weld soundness and strength as is obtained with the TIG process.

Al bronzes

These alloys in the thickness range of 3-12.5 mm might be MIG welded along ease in all positions, due to the comparatively high tension of the molten weld metal and the low thermal conductivity of the base metal.

Si bronzes

These alloys are welded readily by the MIG process, but stringer bead technique, low current and high travel speed ought to be used to prevent excessive heat built-up.