The precision seamless steel pipes produced by our company are of high quality and lower price than others. The ... #, 45#, 16Mn, 30CrMo, Q345, St37, St52, St45, St35.8, ST35 Technique Cold rolled, Cold drawn Thickness1-14mm , or as your ... or according to customers' requirements Usagewidely used in Mechanical and Production Engineering Technology, ship building, petrochemical engineering, etcPersonal ...