Ask what is called pig iron, wrought iron is called what? How to distinguish?
Cast iron with high carbon content, brittle wrought iron, low carbon content, with toughness, ductility, iron tapping clear distinction: short and long wrought iron
Pig iron is low in silicon content, generally less than 1.75%. Is the main raw material, open hearth steelmaking, accounting for 80%~90% in pig iron production in. Pig iron is hard and brittle. Iron and carbon are in a combined state. In the form of cementite (Fe3C), the fracture is silvery white, so it is also called "white iron". Roll, Li Hua iron is white iron.
Cast pig iron contains a large amount of silicon, usually 1.25%~3.6%. Because of its low melting point and good fluidity, it is used to cast various castings, so it is also called cast iron. Cast iron in the form of carbon graphite, its fracture is gray, soft, easy to cut, so it is also called gray iron. Such as the bed, box, pipe, pipe fittings and all kinds of connections, etc., are made by casting pig iron.
