Copper is a non-ferrous metal material that possesses excellent electrical conductivity, thermal conductivity, high malleability, ductility, plasticity, and corrosion resistance. Due to these properties, it is utilized as an indispensable material in a wide range of industrial fields, including electrical and electronic components, electric wires, heat exchangers, piping, building materials, and artistic crafts. For processing, plastic working methods such as rolling, drawing, forging, and press working (including deep drawing) are easily performed due to its high malleability, ductility, and plasticity. Furthermore, its machinability is also good, and turning and milling are common. For joining, welding (TIG, MIG) and brazing are used, and surface treatments such as plating and polishing are applied. Not only pure copper, but also copper alloys such as brass and bronze, undergo various types of processing depending on their application.