20# precision steel tube is a high-precision steel material processed by cold drawing or hot rolling. Because 20# precision steel pipe has no oxide layer on the inner and outer walls, bears high pressure without leakage, high precision, high smoothness, cold bending without deformation, flaring, flattening without cracks, etc., it is mainly used to produce pneumatic or hydraulic components, such as The cylinder or oil cylinder can be a seamless tube or a welded tube. The chemical composition of precision steel pipes includes carbon C, silicon Si, manganese Mn, sulfur S, phosphorus P, and chromium Cr.