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प्रश्न
What elements are present in steel? How are the properties of steel different from those of pure iron?
उत्तर
Steel is an alloy of iron. It is composed of iron with 0.1 to 1.5 per cent carbon. Iron is not suitable to be used in its pure form because pure iron is very soft and elongates easily when hot. Alloying iron with 0.1 to 1.5 per cent carbon changes the properties of pure iron. This combination is steel that is hard and strong in nature. Steel rusts too but not as easily as iron.
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