Engineering Materials
Which of the following statements are true for annealing of steels?

All of these
Cooling is done slowly and steadily
Steels are heated to 500 to 700°C
Internal stresses are relieved

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Engineering Materials
In spheroidising process, the steel is

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

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