Give the composition and uses of alnico,duralumin,gun metal
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Duralumin is an alloy, a trading name given to the earliest types of the age hardenable aluminum alloys. It is an alloy made up of 90% aluminum,4% copper, 1% magnesium and 0.5% to 1% manganese.
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Duralumin is a material created on the basis of pure aluminum with alloying elements, the inclusion of which in the smelting composition changes the properties of the metal. Soft and lightweight aluminum acquires load resistance, while retaining all the advantages of a pure element.
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