Composition of cast iron
Iron-carbon alloys with a carbon content of more than 2%. Industrial cast iron generally has a carbon content of 2.5% to 3.5%. Carbon exists mostly 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, and elements such as manganese, phosphorus, and sulfur. Alloy cast iron also contains nickel, chromium, molybdenum, aluminum, copper, boron, vanadium and other elements. Carbon and silicon are the main elements that affect the microstructure and properties of cast iron.