Analysis from the perspective of carbon content:
- Carbon steel: Carbon steel is also called carbon steel, mainly refers to steel containing less than 2.11% carbon and not containing intentionally added alloying elements. Sometimes called carbon steel or carbon steel. Carbon steel generally contains a small amount of silicon, manganese, sulfur, phosphorus in addition to carbon.
- Iron
(1) Pig iron: iron-carbon alloy with carbon content greater than 2%. Industrial pig iron generally has a carbon content of 2.5%–4%, and contains elements such as C, SI, Mn, S, P, etc. Products smelted by blast furnace. According to the different forms of carbon in pig iron, it can be divided into steel pig iron, cast pig iron and ductile iron. Pig iron properties: pig iron is hard, wear-resistant, casting good, but pig iron is brittle, can not Forging.
(2) wrought iron: relatively pure iron refined from pig iron. The carbon content is below 0.02%, also known as wrought iron, pure iron. The wrought iron texture is soft, plastic, good ductility, and can be drawn into silk. Low strength and hardness, easy to forge and weld.
Analysis from other trace elements
Iron is the richest element in the earth’s crust, second only to oxygen, silicon, and aluminum. Magnetite, hematite, limonite and siderite are important iron ore. The blast furnace of iron metal is obtained by using coke as a fuel and using iron ore and charcoal as raw materials. Pure iron is obtained by reducing pure iron oxide with hydrogen.
Carbon steel generally contains a small amount of silicon, manganese, sulfur, and phosphorus in addition to carbon, but iron does not.