When Iron is alloyed with a non-metal, a hard substance called as steel is formed. The substance which is used to make it hard is ___ .

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Solution

Alloying is a very good method of improving the properties of a metal. The substance added may be a metal or a non-metal. An alloy is a mixture of two or more metals, or a metal and a non-metal. For example, the metal iron when mixed with a small amount of carbon (about 0.05%), it becomes hard and strong to form a new substance called Steel.

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