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Which of the following types of iron represents purest form of iron in the manufacturing process?

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in Casting-Forming-Welding II by (119k points)
Which of the following types of iron represents purest form of iron in the manufacturing process?

(a) Pig iron

(b) White cast iron

(c) Wrought iron

(d) Grey cast iron

The question was asked during an online exam.

My question comes from Cast Irons topic in portion Foundry Introduction & Materials of Casting-Forming-Welding II

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Correct choice is (c) Wrought iron

Explanation: The purest form of iron is wrought iron which has negligible amount of carbon in it. It is highly malleable and tough material which can be used for making products by rolling or forging operation instead of casting process. It is basically obtained by melting pig iron which is also called crude iron.

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