Engineering Materials
Which is false statement about tempering? Tempering is done to

Improve machinability
Improve toughness
Improve ductility
Release stresses

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Engineering Materials
Tungsten in steel

Improves wear resistance, cutting ability and toughness
Improves cutting ability and reduces hardenability
Refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties
Gives ductility, toughness, tensile strength and anti-corrosion properties

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