Are nodular cast iron and pig iron the same material?
Ductile iron is a kind of iron carbon alloy with more than 2% carbon content, which is obtained by smelting iron with pig iron and carbon. The refining of molten iron by "flat" converter "oxygen decarburization" is produced by steel. Therefore, "pig iron" is "steelmaking, iron smelting" of raw materials. Ductile iron is widely used, and large machine tool beds and some engine bodies are available. For reference!
Strictly speaking: pig iron and ductile iron are not the same material. (sometimes used to call cast iron) pig iron: the iron carbon alloy obtained by smelting iron ore through a blast furnace.
Nodular cast iron is a kind of pig iron. Pig iron is an alloy of iron and carbon carbon content more than 2%, pig iron carbon content is generally in 2.5%--4%, including C, SI, and Mn, S, P and other elements, is ductile iron with iron ores in blast furnace smelting products. According to the different form of carbon in pig iron, it can be divided into several kinds, such as steelmaking pig iron, casting pig iron and nodular cast iron.
