Cast Iron

Cast iron is a general term for alloys mainly composed of iron, carbon and silicon. In these alloys, the carbon content exceeds the amount that can be retained in austenitic solid solution at the eutectic temperature.
Cast iron is an iron-carbon alloy with a carbon content above 2.11%. Industrial cast iron generally has a carbon content of 2.5% to 3.5%. Carbon mostly exists in the form of graphite in cast iron, and sometimes in the form of cementite. In addition to carbon, cast iron also contains 1% to 3% silicon, as well as manganese, phosphorus, sulfur and other elements. Corrosion-resistant cast iron also contains nickel, chromium, molybdenum, aluminum, copper, boron, vanadium and other elements. Carbon and silicon are the main elements affecting the microstructure and properties of cast iron. Cast iron is classified according to the form of carbon, and can be divided into nodular cast iron, gray cast iron, white cast iron, and mottled cast iron.

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