Engineering Materials
For the allotropic forms of iron, the points of arrest are

Constant for all metals
The points of discontinuity
The points where there is no further flow of metal
The points where no further change occurs

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Engineering Materials
Aluminium bronze contains

92.5% aluminium, 4% copper, 2% nickel, and 1.5% Mg
10% 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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