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Question

Steel with carbon below 0.8 % is called ________.

A.

eutectoid steel

B.

hypo-eutectoid steel

C.

austenite

D.

hyper-Eutectoid steel

Answer ( Option B)

hypo-eutectoid steel

Solution

Hypoeutectoid steel : 0.02<%C<0.8

Eutectiod steel : 0.8%C

Hypereutectoid steel : 0.8<%C<2.1

Steel containing 0.8 % C is known as eutectoid steel. The equilibrium microstructure of eutectoid steel obtained at room temperature is pearlite.

Hence, the correct option is (B).

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