Engineering Materials
Cobalt in steel

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

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Engineering Materials
Dow metal contains

90% aluminium and 90% copper
92.5% aluminium and, 4% copper, 2% nickel and 1.5% Mg
94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
90% magnesium and 9% aluminium with some copper

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