... for high quality and more competitive price! ASTM A53 GR.B Seamless Tube 1.WT:2 ... .packing:painting,BE,plastic caps,ma ASTM A53 GR.B Seamless TubeSpecifications1)Seamless steel ... for usual structure and machines 3) Model No.: ASTM A106 grade A/B, API 5L, X52, X42, ST52, ... 5) Foreign standards implemented: DIN, JIS, ASTM (ASME),etcASTM A-106 and ASTM A-53 Grade BChemical composition, %, no moreCMnSiPSCr0.17 ...