Alloy steel refers to steel which contains other alloying elements in addition to silicon and manganese as alloying elements or deoxidizing elements, and some also contains some non-metallic elements. According to the content of alloying elements in steel, it can be divided into low alloy steel, medium alloy steel and high alloy steel.
Carbon steel mainly refers to the steel whose mechanical properties depend on the carbon content in the steel, and generally does not add a large amount of alloying elements, sometimes called ordinary carbon steel or carbon steel.
Carbon steel, also called carbon steel, has an iron-carbon alloy with a carbon content of less than 2% WC. Carbon steel generally contains a small amount of silicon, manganese, sulfur, and phosphorus in addition to carbon. Carbon steel can be classified into three types: carbon structural steel, carbon tool steel, and free-cutting structural steel. According to the carbon content, carbon steel can be divided into low carbon steel (WC ≤ 0.25%), medium carbon steel (WC 0.25% - 0.6%) and high carbon steel (WC > 0.6%).
Generally, the higher the carbon content of carbon steel, the higher the hardness and the higher the strength, but the lower the plasticity.