The Argon-arc welder is a portable device for welding products by AC and DC current pulse with an optimum force of 200A. It allows welding low-alloy steels, aluminum alloys and other non-ferrous materials. The efficiency of the device is up to 85%. Low weight ~14 kg and rather compact dimensions (0,5x0,2x0,3 m) allow its transportation if necessary. An excellent option for professional activities. It is possible to weld crankcases, engine blocks, repair alloy engines, patch craters and cracks.