Engineering Materials
When the steel is normalized, its

All of these
Ductility decreases
Ultimate tensile strength increases
Yield point increases

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Engineering Materials
Nickel in steel

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

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Engineering Materials
In spheroidising process, the steel is

Heated below the lower critical temperature and then cooled slowly
Heated slightly above the lower critical temperature and then cooled slowly to a temperature of 600°C
Heated up to the lower critical temperature and then cooled in still air
None of these

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Engineering Materials
Cobalt in steel

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

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