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Question

Steel is mainly an alloy of iron and:

A
chromium
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B
nickel
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C
manganese
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D
carbon
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Solution

The correct option is D carbon
1) Carbon steel, composed simply of iron and carbon.
2) Low alloy steel is alloyed with other elements, usually molybdenum, manganese, chromium, or nickel, in amounts of up to 10 by weight to improve the hardenability of thick sections.

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