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In full annealing, the steel is heated at what temperature?

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in Casting-Forming-Welding II by (119k points)
In full annealing, the steel is heated at what temperature?

(a) Above critical temperature

(b) Above vaporization temperature

(c) Above liquefying temperature

(d) Above solidification temperature

I have been asked this question in a job interview.

The origin of the question is Annealing and Normalizing in division Heat treatment of Metals and Alloys of Casting-Forming-Welding II

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The correct option is (a) Above critical temperature

For explanation I would say: In the process of full annealing, the steel has to be heated slightly above the critical temperature. At this point, the steel has to be held for a considerable amount of time.

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