Cast iron pan

A pot made of iron-carbon alloy with a carbon content of more than 2%. Industrial cast iron generally has a carbon content of 2% to 4%. Carbon exists mostly in the form of graphite in cast iron, and sometimes also in the form of cementite. In addition to carbon, cast iron also contains 1% to 3% silicon, and elements such as phosphorus and sulfur. Alloy cast iron also contains elements such as nickel, chromium, molybdenum, copper, boron, and vanadium. Carbon and silicon are the main elements affecting the microstructure and properties of cast iron. Cast iron can be divided into: ① gray cast iron. The carbon content is high (2.7% to 4.0%). Carbon mainly exists in the form of flake graphite, and the fracture is gray, referred to as gray iron. Low melting point (1145 ~ 1250 ℃), small shrinkage during solidification, compressive strength and hardness close to carbon steel, good shock absorption. Used for manufacturing machine parts, cylinders, boxes and other structural parts. ② white cast iron. The content of carbon and silicon is low. Carbon mainly exists in the form of cementite, and the fracture is silver-white.