Duty Cycle: Usually 60% to 100% at full 630A output under standard conditions. A 60% duty cycle means it can weld continuously for 6 minutes out of a 10-minute block at peak Sizes:MMA / Arc Stick Mode: Accommodates extra-thick industrial electrodes from 1.6mm up to 8.0mm.MIG / Gas Shielded Mode: Supports heavy structural wires ranging from 1.0mm to 1.6mm.Max Weld Thickness: Capable of melting through and joining steel plates well over 20mm thick in multi-pass setups (and structural beams up to 5mm–8mm in single penetration depending on technology