Detailed Product Description CommodityAlloy Steel Seamless PipeMaterialASTM: T2,T5, T9, T11, T22, P2,P12,P5, P9, P11, P22,etc JIS: STBA 20,STBA 22,STBA ... ,X12CrMo91 GB: 12CrMo,15CrMo,12Cr2Mo,1Cr5Mo Standard ASTM A213,ASTM A335,JIS G3462,JIS G3458, DIN 17175,GB 5310,GB 6479 ...