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When the molten pig iron and slabs of sand or metal casting and cold, the iron is obtained. Converting pig iron into iron, special treatment and are not exact.
Malleable cast iron
When the molten pig iron and sponge are put in, as well as impurities such as silicon, manganese and carbon filtration sense, we achieved wrought iron.
White cast iron
Carbon alloy, crystal form Smantyt (iron carbide Fe3C), which is the result of the cooling liquid. The soft material can reduce the degree of fragility.
It is an alloy of iron (white iron) and careful treatment of pig iron, carbon and other elements of the mix comes with scrap metal.
Steel scrap, iron scrap is ascribed.