Engineering Materials
Admiralty gun metal contains

Iron scrap and zinc
63 to 67% nickel and 30% copper
88% copper, 10% tin and rest zinc
Alloy of tin, lead and cadmium

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Engineering Materials
Cobalt in steel

Improves cutting ability and reduce hardenability
Gives ductility, toughness, tensile strength and anti corrosion property
Improves wear resistance, cutting ability and toughness
Refines grain size and produces less tendency to carburisation, improve corrosion and heat resistant proper ties

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