Copper alloys form a group of materials of major commercial importance because they are characterized by such useful mechanical properties ashigh ductility and formability and excellent corrosion resistance. Copperalloys are easily joined by soldering and brazing. Like gold alloys, copperalloys have decorative red, pink, yellow, and white colors. Copper has thesecond highest electrical and thermal conductivity of any metal. All thesef actors make copper alloys suitable for a wide variety of products.