An alloy of Fe - 0.4 % C is__________________?
Correct answer: B. Hypo-eutectoid steel
- A. Cast iron
- B. Hypo-eutectoid steel
- C. Hyper-eutectoid steel
- D. Eutectoid steel
Explanation
The eutectoid composition of plain carbon steel is about 0.8% carbon, so an Fe–0.4% C alloy lies below it. It is therefore hypoeutectoid steel, not eutectoid or hyper-eutectoid steel.
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