The density of brass (8.93g/cm3) is multi-purpose and mechanical bearing bush lining, wear-resistant. Brass castings are often used to make valves and pipe fittings. Ordinary brass is widely used, such as water tank belt, water supply and drainage pipes, medals, bellows, serpentine pipes, condensation pipes, cartridge shells and various complex shaped stamping products, hardware and so on. With the increase of zinc content from H63 to H59, they can well withstand thermal processing, mostly used in various parts of machinery and electrical appliances, stamping parts and musical instruments.Copper, has a density of 7.83g/cm3 and a melting point of 1083 degrees. It is nonmagnetic. It has good electrical conductivity, thermal conductivity, corrosion resistance and toughness. Copper is ductile. Pure copper, the size of a drop of water, can be pulled up to two kilometers of filament or rolled into almost transparent foil larger than a bed. The most valuable property of copper is its excellent electrical conductivity, which is second only to silver in all metals. But copper is much cheaper than silver, making it the leading player in the electrical industry.
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