Engineering Materials
A reversible change in the atomic structure of steel with corresponding change in the properties is known as

Solidus change
Physical change
Molecular change
Allotropic change

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Engineering Materials
Dow metal contains

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

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