Cast iron is a carbon-containing iron-carbon alloy. Carbon is mostly in the form of graphite in cast iron, and sometimes in the form of cementite. In addition to carbon, cast iron also contains elements such as silicon, manganese, phosphorus and sulfur. Alloy cast iron also contains elements such as nickel, chromium, molybdenum, aluminum, copper, boron, and vanadium. Carbon and silicon are the main elements that affect the microstructure and properties of cast iron. Cast iron can be divided into: gray cast iron, white cast iron, malleable cast iron, ductile iron, vermicular cast iron, alloy cast iron. Iron spheroidal graphite cast iron is used in our table legs.