... ,and we have good reputation at domestic and abroad. ItemsSpecificationcarbon seamless steel tube GBDINASTMGB/8162-1999 GB/T3087DIN2391 GB/T3639-2000DIN1629/4ASTMA106 ... EN10305 GB/T8163-1999 Material10#,20#,45#,16Mn,Q345,St37,St52,St45,ST35.8,ST35 etc.TechniqueCold Drawn,Cold rolledThickness1-14mm ... interested in our products,pls contact me! Cold Drawn Precision Seamless Steel Pipe