Many people think that copper is the only one which is unique but in fact there are other different kinds of copper, such as copper alloy. Slowly below: Copper Copper is a rose red metal, copper oxide film formed on the surface of purple, it is often called industrial copper to copper or copper cathodes. Density of 8 9g/cm?, Melting point 1083 ° C the electrical conductivity of copper is very good, used in the manufacture of a large number of wires, cables, brush; thermal conductivity, magnetic instruments, instrument used to manufacture beware of magnetic interference, such as compass, aircraft instrument; excellent plastic and easy hot and cold force processing, can be made of tube, rod, wire, bar, strip, plate, foil, such as copper. Copper smelting products and processed products. Second, copper alloy (copper-nickel alloy, brass, bronze, etc.) Brass is an alloy of copper and zinc. The easiest brass, copper, zinc binary alloy, known as the simple brass or brass. Change the content of zinc in brass, brass can get different mechanical properties. Brass zinc content is higher, and its intensity is higher, lower plasticity. Industry, brass, zinc does not exceed 45% of the high zinc content will be brittle, the deterioration of alloys. In order to improve the performance of a brass, to join the other alloying elements on the basis of a one-brass brass called special brass. Common alloying elements silicon, aluminum, tin, lead, manganese, iron and nickel. Brass and aluminum can improve the yield strength and corrosion resistance of brass, slightly lower plasticity. Less than 4% of the aluminum-containing brass has good processing, casting and other performance. Brass adding 1% tin can significantly improve the resistance to seawater and marine atmospheric corrosion of brass, it became the Navy brass. Tin can improve the brass cutting performance. Of leaded brass main purpose is to improve the cutting and improved abrasion resistance, impact of lead on the strength of brass. The manganese brass has good mechanical properties, thermal stability and corrosion resistance; manganese brass and aluminum, but also can improve its performance, the smooth surface of the casting. Brass casting and pressure processing can be divided into two types of products. Shanghai Tian Rui Metal Materials Co., Ltd. (according to user needs, can be produced according to drawings) Marketing Miss Li T :021-63066307/56062869 F :021-56060561 QQ: 441594627/1650507469 Address: Shanghai Zhabei District Lingshi Road 891 Email: coco_trcopper@163.com URL: www.tr-copper.com lwtrjs20130521