Max Amperage: The 500A output means the machine can generate enough heat to weld very thick metal plates, often in the range of 3$1/2″$ (12mm) up to 4$5/8″$ (16mm) or more, frequently used in structural steel, heavy fabrication, shipbuilding, and large-scale construction projects.5 Welding Process: At this power level, the machine is usually a multi-process unit capable of:6 MIG (GMAW): Often used for high-speed, continuous welds on heavy components. Stick/MMA (SMAW): Excellent for welding with large-diameter electrodes (up to 5.0mm) for maximum penetration, especially on dirty or rusty material and for critical structural joints.7 TIG (GTAW): DC TIG is typically available, though some models may offer AC/DC TIG for aluminum.



