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In annealing process, for the formation of hypoeutectoid steel, the steel has to be heated above what point?

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in Casting-Forming-Welding II by (119k points)
In annealing process, for the formation of hypoeutectoid steel, the steel has to be heated above what point?

(a) Ac1

(b) Ac2

(c) Ac3

(d) Ac4

I got this question in an interview.

I'd like to ask this question from Annealing and Normalizing in division Heat treatment of Metals and Alloys of Casting-Forming-Welding II

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Best answer
Right choice is (c) Ac3

Easy explanation: None.

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