Properties and Uses
(1) White metal with bluish tinge, capable of taking a high polish.
(2) Its specific gravity is 8.67 and melts at 321°C.
(3) It is slightly harder than tin but softer than zinc.
(4) It is malleable and ductile and can be readily rolled and drawn into wires.
It is chiefly utilized in antifriction alloys for bearings. It is also used as rust proof
coating for iron and steel. Components of automobiles and refrigerator such as nuts,
bolts and trimmings, locks and wire products are plated with it.
2.12 ALLOYS OF COPPER
Copper alloys are among the best conductors of heat and electricity and they have good
corrosion resistance. The common types of copper alloys are brasses and bronzes. The
various alloys of copper are discussed as follows:
2.12.1 Brass
All brasses are basically alloys of copper and zinc. Commercially there are two main
varieties of brasses:
(1) Alfa brass:
Contains upto 36% Zn and rest copper for cold working.
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