Classification of carbon steel

(1) According to the application, carbon steel can be divided into three types: carbon structural steel, carbon tool steel and free-cutting structural steel, and carbon structural steel is divided into engineering construction steel and machine manufacturing structural steel;
(2) According to the smelting method, it can be divided into open-hearth steel and converter steel;
(3) According to the deoxidation method, it can be divided into boiling steel (F), killed steel (Z), semi-killed steel (b) and special killed steel (TZ);
(4) According to the carbon content, 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%);
(5) 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 advanced high-quality steel (lower phosphorus and sulfur content) ) and super high-quality steel.