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What is the percentage weight of iron in cementite?(a) 93.3%(b) 94.3%(c) 95.3%(d) 96.3%The question was posed to me in an interview for internship.This intriguing question originated from Transformation in Steel in chapter Heat treatment of Metals and Alloys of Casting-Forming-Welding II

Answer» CORRECT ANSWER is (a) 93.3%

Explanation: In the compound IRON carbide or CEMENTITE, the percentage weight of iron is 93.3% and the rest of the space in the lattice is occupied by CARBON. By weight, carbon is present in about 6.67% in the mixture.


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