... ,and we have good reputation at domestic and abroad. ItemsSpecificationcarbon seamless steel tube GBDINASTMGB/8162-1999 GB/T3087DIN2391 GB/T3639-2000DIN1629/4ASTMA106 ... #,16Mn,Q345,St37,St52,St45,ST35.8,ST35 etc.TechniqueCold Drawn,Cold rolledThickness1-14mm,or as cutomers' needOuter Diameter6-114mm,or as ... !If you are interested in our products,pls contact me! Cold Drawn Precision Seamless Steel Pipe