The AC225S Welder is Lincolns Best selling arc welder of all time. It has a broad welding amperage range of 40-225 amps The AC-225 produces an extremely smooth AC arc for welding a wide variety of materials including carbon, low alloy, and stainless steels as well as cast iron. Metals 16gauge and heavier can easily be arc welded with the AC-225. The AC-225 comes with a three year warranty on parts and labor. Manufactured under a quality system certified to ISO 9001 requirements.