Engineering Materials
The lower critical temperature

Increases as the carbon content in steel increases
Is same for all steels
Decreases as the carbon content in steel increases
Depends upon the rate of heating

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Engineering Materials
Dow metal contains

90% magnesium and 9% aluminium with some copper
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

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