According to different manufacturing methods, metal structural parts can be divided into metal structural parts manufactured by various processes such as casting, forging, drawing, bending, shearing, welding, etc., among which the manufacturing process of welding metal structure is the most widely used;
According to material classification, metal structural parts can be divided into steel structure, aluminum alloy structure, copper alloy structure, magnesium alloy structure, tin structure and other metal structures, among which steel structure is the most widely used and mature metal structure manufacturing method;
According to the classification of application areas, metal structural parts can be divided into building structure, aerospace structure, ship structure, vehicle structure, etc.