45# precision steel tube is a kind of high precision steel tube material processed by cold drawing or hot rolling. Because 45# precision steel pipe has no oxide layer on the inner and outer walls, withstands high pressure without leakage, high precision, high finish, 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.