Engineering Materials
Cementite consist of

13% cementite and 87% ferrite
13% ferrite and 87% cementite
13% carbon and 87% ferrite
6.67% carbon and 93.33% iron

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Engineering Materials
Cobalt in steel

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

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