Engineering Materials
Cementite consist of

6.67% carbon and 93.33% iron
13% carbon and 87% ferrite
13% cementite and 87% ferrite
13% ferrite and 87% cementite

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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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