... , petrochemical engineering, etc The feature of our precision seamless steel pipeItems SpecificationsStandardGBDINASTMGB/T8162-1999 GB/T8163-1999 GB/T8163 GB ... #, 45#, 16Mn, 30CrMo, Q345, St37, St52, St45, St35.8, ST35 Technique Cold rolled, Cold drawn Thickness1-14mm , or as your ... #, 45#, 16Mn, 30CrMo, Q345, St37, St52, St45, St35.8, ST35 Technique Cold rolled, Cold drawn Thickness1-14mm , or as your ...