When low carbon steel is heated up to upper critical temperature Options: A . &nbspThe grain size first increases and then decreases very rapidly B . &nbspThe grain size increases very rapidly C . &nbspThe average grain size is a minimum D . &nbspThere is no change in grain size

When low carbon steel is heated up to upper critical temperature

Question

When low carbon steel is heated up to upper critical temperature

Options:

A . The grain size first increases and then decreases very rapidly

B . The grain size increases very rapidly

C . The average grain size is a minimum

D . There is no change in grain size

Answer: Option C

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