Auto-Spot Welding Parts switch parts, stamping with auto welding and auto riveting or auto assembly. Auto-Spot Welding Parts 1: material: Copper, Brass, Bronze, CuSn, CuNi, Ni, CuNiZn ... , welding material: Ag, AgNi, AgCuNi, AgSnO22: OEM/ODM parts of Pressing Parts: Yes, Auto parts, engine parts, computer electronics.3: Process: punching, riveting, welding, metal ...