Copper alloy is an alloy consisting of one or several other elements with pure copper as its matrix. Pure copper is purple-red, also known as copper. The density of pure copper is 8.96 and the melting point is 1083 C. It has excellent electrical conductivity, thermal conductivity, ductility and corrosion resistance. Importantly used in the production of generators, buses, cables, switch assembly, transformers and other electrical things and heat exchangers, pipes, solar heating assembly of flat collectors and other thermal conductive things. Rare copper alloys can be divided into three categories: brass, bronze and white copper.