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Published on 30-01-10 05:49 AM
Steel
Steel is a solution of carbon in iron and the properties of steels can be changed by altering the amount of carbon present, adding other alloying elements, or by heat treating the steel. At high temperatures iron exists as a liquid in which the carbon is dissolved. As the iron cools it solidifies and takes up first a face centred and then a body centred crystalline form. Solid iron can hold
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