Heating the hypo-eutectoid steels to \[30{}^\circ C\] above the upper critical temperature line, soaking at the temperature and then cooling slowly to room temperature to form a pearlite and ferrite structure, is known as;

Heating the hypo-eutectoid steels to \[30{}^\circ C\] above the upper

1.	Heating the hypo-eutectoid steels to \[30{}^\circ C\] above the upper critical temperature line, soaking at the temperature and then cooling slowly to room temperature to form a pearlite and ferrite structure, is known as;
A.	Hardening
B.	Normalizing
C.	Tempering
D.	Annealing
Answer» E.

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Heating the hypo-eutectoid steels to \[30{}^\circ C\] above the upper critical temperature line, soaking at the temperature and then cooling slowly to room temperature to form a pearlite and ferrite structure, is known as;

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