Engineering Materials
When medium carbon steel is heated to coarsening temperature

There is no change in grain size
The grain size increases very rapidly
The grain size first increases and then decreases very rapidly
The average grain size is a minimum

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Engineering Materials
A coarse grained steel

Is more ductile and has a less tendency to distort during heat treatment
Is less tough and has a greater tendency to distort during heat treatment
Is less tough and has a less tendency to distort during heat treatment
Is more ductile and has a greater tendency to distort during heat treatment

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