Engineering Materials
Aluminium bronze contains

90% magnesium and 9% aluminium with some copper
92.5% aluminium, 4% copper, 2% nickel, and 1.5% Mg
94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
10% aluminium and 90% copper

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Engineering Materials
Chromium in steel

Refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties
Improves wear resistance, cutting ability and toughness
Gives ductility, toughness, tensile strength and anti-corrosion properties
Improves cutting ability and reduces hardenability

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