Engineering Materials
Cobalt in steel

Improves cutting ability and reduce hardenability
Improves wear resistance, cutting ability and toughness
Refines grain size and produces less tendency to carburisation, improve corrosion and heat resistant proper ties
Gives ductility, toughness, tensile strength and anti corrosion property

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Engineering Materials
Carbon steel is

Refined from cast iron
An alloy of iron and carbon with varying quantities of phosphorus and sulphur
Extensively used for making cutting tools
Made by adding carbon in steel

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