Engineering Materials
Which is false statement about annealing? Annealing is done to

Harden steel slightly
Relieve stresses
Improve machining characteristic
Soften material

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Engineering Materials
Dow metal contains

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
90% aluminium and 90% copper

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