... from 8mm to 219mm W.T from 1mm to 12mm Precision seamless steel pipeStandard: GB,DIN,EN,ASTMO.D: 8MM-219MMW ... : 5.8m-12mCondition: GBK, NBK,BK,BKW,BKSInspection: Chemical composition, Mechanical properties (Tensile strength,Yield strength, Elongation, Flaring, Flattening, Hardness, impact ...