Engineering Materials
Sulphur in cast iron

Aids fusibility and fluidity
Make the iron white and hard
Increases hardness and brittleness
Makes the iron soft and easily machinable

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Engineering Materials
In spheroidising process, the steel is

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

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