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Which among the following impurity is not added to steel?(a) Silicon(b) Carbon(c) Manganese(d) ArsenicThis question was posed to me during a job interview.The question is from Steel topic in section Metallurgical Industries of Chemical Technology

Answer» CORRECT answer is (d) Arsenic

For explanation: Sulphur is added in STEEL to improve its machineability but LOWERS the ductility. Carbon increases the strength of steel WHEREAS manganese increases the HARDENABILITY.


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