... 17175, GB3087, GB5310A, B, V, T11, T12, T22, T91, St35.8, St45.8, 20#, 20G, 20MnG, 20MoG, 15CrMoG, 12Cr1MoVGLow & medium & high ... TubeASME SA213, GB9948T5, T9, 20#, 16Mn, 12CrMo, 15CrMoUsed in petroleum cracking furnaceChemical PipeGB647920#, 16Mn, 12CrMo, 15CrMoHigh pressure chemical ... then finished to dimensional and wall thickness specifications in sizes from 1/8'' to 36'' OD. Models of steel ...