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The carbon in typical steel alloys may contribute up to ___________ of its weight.

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The carbon in typical steel alloys may contribute up to ___________ of its weight.

(a) 9.14%

(b) 71.14%

(c) 2.14%

(d) 25.14%

I had been asked this question during an online exam.

I'd like to ask this question from Steel and Iron Work topic in section Rules and Methods of Measurement of Civil Engineering Drawing

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Right option is (c) 2.14%

Easy explanation: Varying the amount of carbon and many other alloying elements, as well as controlling their chemical and physical makeup in the final steel (either as solute elements, or as precipitated phases), slows the movement of those dislocations that make pure iron ductile, and thus controls and enhances its qualities.

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