In annealing process, for the formation of hypereutectoid steel, the steel has to be heated above what point?(a) Ac1(b) Ac2(c) Ac3(d) Ac4I had been asked this question during an online interview.My question is from Annealing and Normalizing topic in section Heat treatment of Metals and Alloys of Casting-Forming-Welding II

In annealing process, for the formation of hypereutectoid steel, the s

1.	In annealing process, for the formation of hypereutectoid steel, the steel has to be heated above what point?(a) Ac1(b) Ac2(c) Ac3(d) Ac4I had been asked this question during an online interview.My question is from Annealing and Normalizing topic in section Heat treatment of Metals and Alloys of Casting-Forming-Welding II
Answer» Right answer is (a) Ac1 For explanation I would SAY: For the formation of hypereutectoid steel, in annealing PROCESS, the steel has to be heated above the Ac1 point, which is the LOWER critical LINE in the temperature versus CARBON content graph.

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