What is 20# steel

No. 20 steel is also written as 20# steel. It is a kind of high-quality carbon structural steel plate, which means that the C content of the steel is 0.20%, which is a low-carbon steel. No. 20 steel has low strength, good toughness, plasticity and weldability. It is mainly used to manufacture various parts in the automobile, tractor, and mechanical equipment industries.

The chemical composition of 20# steel:
C: 0.17-0.23, Si: 0.17-0.37, Mn: 0.35-0.65, P≤0.035, S≤0.03, Cr≤0.20, Ni≤0.30, Cu≤0.25.
1. If the content of residual elements chromium, nickel, and copper in steel can be guaranteed by the supplier, the analysis is not required.
2. The nitrogen content of the steel smelted by the oxygen converter should not exceed 0.008%, and the supplier can guarantee that it is qualified, and the analysis is not required.
3. The allowable deviation of the chemical composition of the finished steel plate should meet the requirements of GB/T222.