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What is the correct answer?

4

Cobalt in steel

A. Improves wear resistance, cutting ability and toughness

B. Refines grain size and produces less tendency to carburisation, improve corrosion and heat resistant proper ties

C. Improves cutting ability and reduce hardenability

D. Gives ductility, toughness, tensile strength and anti corrosion property

Correct Answer :

C. Improves cutting ability and reduce hardenability


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