Aluminum is tough, weather proof and easily formed. Aluminum alloy has low density and strong resistance to oxidation, which contribute to its widespread use in many industries including aviation and military sectors.
Zinc, a metallurgic feedstock, is mainly used to manufacture Cu-Zn by fusing Cu with Cu-Sn, also to manufacture anticorrosive alloys by fusing with Cu, Pb and Sn, widely used in machinery, press, national defense industries. GB/T470_1997
Cobalt is silvery and magnetic metal used in many industries including aviation and military sectors. In metallurgy, cobalt as a charge is able to melt with many metals into alloys, such as close (refined) alloys, refractory alloys, rigid alloys, jointing alloys and other alloys. (GB6517-86)
The processed copper products are cathode copper and refined copper, mainly from Jin Chuan of China(GB466-82). Products are used to casting copper wire, bars, ingot, foundry alloys and refined copper.