Copper alloys are a group of metallic materials that primarily consist of copper, with elements such as zinc, tin, nickel, and aluminum added to enhance properties like strength, corrosion resistance, wear resistance, and workability, while retaining the excellent electrical and thermal conductivity of pure copper. Representative examples include brass, bronze, and cupronickel. Due to their characteristics, they are utilized in a wide range of fields, including connectors and terminals for electrical and electronic components, bearings and radiators for automotive parts, building materials, marine components, and chemical plants. Various processing methods can be applied, such as casting, forging, rolling, drawing, machining, pressing, and welding. Many copper alloys possess particularly excellent ductility and machinability, making them suitable for manufacturing parts with complex shapes.