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It is decorative. It is easily formed, machined, and cast.
Alloys with small amounts of copper, magnesium, silicon, manganese, and other elements have very useful properties.
Strength depends on purity. 99.996 per cent pure aluminium has a tensile strength of about 49 megapascals (MPa), rising to 700 MPa following alloying and suitable heat treatment.
Although not found free in nature, Aluminium is an abundant element in the earth's crust.
A key property is low density. Aluminium is only one-third the weight of steel. Aluminium and most of its alloys are highly resistant to most forms of corrosion. The metal's natural coating of aluminium oxide provides a highly effective barrier to the ravages of air, temperature, moisture and chemical attack.
Aluminium is a superb conductor of electricity. This property allied with other intrinsic qualities has ensured the replacement of copper by aluminium in many situations.
Aluminium is non-magnetic and non-combustible, properties invaluable in advanced industries such as electronics or in offshore structures.
