The book is devoted to the issues of metallurgy, arc welding and quality control of welded joints, as well as cutting the most common grades of stainless steels. The basic requirements for equipping and equipping posts for all arc welding methods are outlined. New and widely used cutting methods are described. Peculiarities of assembly and welding of structures from homogeneous and heterogeneous steels are considered. Analysis of defects in welds is given. The book is intended for welders of the shipbuilding industry.