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For how long is the heated steel held in full annealing process?

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in Casting-Forming-Welding II by (119k points)
For how long is the heated steel held in full annealing process?

(a) 1 minute

(b) 3 minutes

(c) 6 minutes

(d) 9 minutes

This question was addressed to me by my college director while I was bunking the class.

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

1 Answer

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Right answer is (b) 3 minutes

To explain: The heated steel is held at the critical temperature for about 3 to 4 minutes. By doing this, the steel gets enough time to make the internal changes desired.

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