High-quality carbon structural steel is carbon steel with carbon content less than 0.8%, which contains less sulfur, phosphorus and non-metallic inclusions than carbon structural steel, and has better mechanical properties.

High-quality carbon structural steel can be divided into three categories according to the carbon content: low carbon steel (C≤0.25%), medium carbon steel (C 0.25-0.6%) and high carbon steel (C > 0.6%).

According to the different manganese content, high-quality carbon structural steel is divided into normal manganese content (manganese content 0.25%-0.8%) and high manganese content (manganese content 0.70%-1.20%), the latter has better mechanical properties and processing properties.

1. high-quality carbon structural steel hot rolled sheet steel and steel strip

High quality carbon structural steel hot rolled sheet steel and steel strip used in automotive, aviation industry and other sectors. The grade of its steel is boiling steel: 08F, 10F, 15F; Killed steel: 08, 08AL, 10, 15, 20, 25, 30, 35, 40, 45, 50. 25 and below are low carbon steel plates, 30 and above are medium carbon steel plates.

2. high-quality carbon structural steel hot rolled thick steel plate and wide steel strip

High quality carbon structural steel hot rolled thick steel plates and wide steel strips are used for various mechanical structural parts. Its steel grade is low carbon steel including: 05F, 08F, 08, 10F, 10, 15F, 15, 20F, 20, 25, 20Mn, 25Mn, etc.; Medium carbon steel includes: 30, 35, 40, 45, 50, 55, 60, 30Mn, 40Mn, 50Mn, 60Mn, etc.; High carbon steel includes: 65, 70, 65Mn, etc.