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Cooling of hypoeutectoid steels in done is furnace by decreasing the temperature to at least ________ below the A1 line.

Cooling of hypoeutectoid steels in done is furnace by decreasing the temperature to at least ________ below the A1 line. Correct Answer 30oC

For full annealing of this steel, it is heated 30-60oC above the A3 line. Then it is cooled within the furnace by decreasing the temperature 10-30oC per hour, to at least 30oC below A1 line.

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Cooling of hypoeutectoid steels in done is furnace by decreasing the temperature to at least . . . . . . . . below the A1 line.
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