Patented alloy steel casting molds characteristic ingredients of steel main chemical component analysis (%) (for reference only) W403 hot: macro, fine microstructure, segregation and less harmful trace element content of the gas content of the lowest minimum optimum isotropic and homogeneous purity The best of the best polishing toughness highest thermal conductivity of the best heat dimensional stability is best machining performance good working better hardness (less hot wear, higher thermal strength) main purposes: for heavy-duty hot work tools and dies, mainly used for processing light alloys, metal pipes, metal rods, extrusion mandrel, molds and extrusion molding motif, hot extrusion equipment, manufacturing hollow bodies, screws, rivets, nuts and bolts of tools and molds. Die-casting equipment, molding die, die inserts, hot shear blades and plastic molds, etc.