Engineering Materials
The temperature required for full annealing in hypereutectoid steel is

30° C to 50° C above upper critical temperature
30° C to 50° C below lower critical temperature
30° C to 50° C above lower critical temperature
30° C to 50° C below upper critical temperature

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Engineering Materials
Points of arrest for iron correspond to

There is nothing like points of arrest
Stages at which properties do not change with increase in temperature
Stages at which further heating does not increase temperature for some time
Stages at which allotropic forms change

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