Carbon steel is an iron-carbon alloy with a carbon content of 0.0218% to 2.11%. Also known as carbon steel. Generally also contains a small amount of silicon, manganese, sulfur, phosphorus. the higher the carbon content , the greater the hardness and the higher the strength, but the lower the plasticity.
The properties of carbon steel depend mainly on the carbon content. An increase in carbon content increases the strength and hardness of the steel and decreases plasticity, toughness and weldability. Compared with other steels, carbon steel is the earliest used, low cost, wide range of performance, the largest amount. Suitable for nominal pressure PN ≤ 32.0MPa, temperature of -30-425 ℃ water, steam, air, hydrogen, ammonia, nitrogen and petroleum products and other media.
Carbon steel can be divided into three categories according to its use: carbon structural steel, carbon tool steel and free-cutting structural steel.
Carbon steel can be divided into low carbon steel (WC≤0.25%), medium carbon steel (WC0.25%-0.6%) and high carbon steel (WC≥0.6%) according to carbon content.
According to the quality of steel, carbon steel can be divided into ordinary carbon steel (higher phosphorus and sulfur content), high-quality carbon steel (lower phosphorus and sulfur content) and high-grade high-quality steel (lower phosphorus and sulfur content) and extra high quality steel.
