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Which of the following forms of iron is least malleable?

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in Casting-Forming-Welding II by (119k points)
Which of the following forms of iron is least malleable?

(a) Austenitic

(b) Pearlitic

(c) Ferritic

(d) Martensitic

I got this question in exam.

My question is taken from Classification of Foundry Metals and Alloys in chapter Foundry Introduction & Materials of Casting-Forming-Welding II

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Right answer is (a) Austenitic

The best explanation: Malleable irons are cast irons which are classified under iron base materials, under foundry metals and alloys. Among these phases of iron, the austenite phase of iron is measured to be showing the least amount of malleability.

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