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What property does 'pig iron' have that makes it unsuitable for use in railway lines?
Wiki User
∙ 16y ago
Generally impurities that cannot provide a consistant strength throughout the whole material. A 'pig' is the term for a section of iron as cast. These are often brittle, and need the several percent of carbon reduced before the material takes on the superior malleability of mild steel. For rails, a hard wearing surface is also helpful, so that a remelt with some manganese and other alloy ingredients are added to produce alloy steel which is rolled into rail cross sections, which acts as a form of toughening.
Wiki User
∙ 16y ago
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