Copper is one of the earliest ancient metals discovered by human beings. It was used more than 3000 years ago.

Metallic copper, element symbol Cu, atomic weight 63.54, specific gravity 8.92, melting point 1083oC. Pure copper is light rose or light red, and the appearance is copper after the formation of copper oxide film on the surface. Copper has many valuable physical and chemical properties.

● The thermal conductivity and conductivity are very high, second only to silver, and much higher than other metals. This characteristic makes copper become an important material in the electronic and electrical industry.

● Strong chemical stability and corrosion resistance. It can be used to manufacture various containers contacting corrosive media, so it is widely used in energy, petrochemical industry and light industry.

● High tensile strength, easy fusion, plasticity and ductility. Pure copper can be drawn into very thin copper wire to make very thin copper foil. It can form alloy with zinc, tin, lead, manganese, cobalt, nickel, aluminum, iron and other metals. Used for various transmission parts and fixed parts in mechanical metallurgy industry.

● The structure is rigid and flexible, and has a colorful appearance. For architecture and decoration.