
How To Weld Sheet Metal - TIG / MIG / - Welding …
Its primary usage is in welding auto body and sheet metal. Spot welding is usually used to join a panel of overlapping sheet metal, parts that are usually 3mm thick. The ration of thickness should not exceed 3.1mm. This is because the strength of the joints depends on the nuer and size of the weld. Thus, spot welding diameters go from 3mm to