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国际标准阀门用钢 X50CrSi8-2,X45CrSi9-3,X85CrMoV18-2,X55CrMnNiN20-8,X53CrMnNiN21-9,X50CrMnNiNbN21-9,X53CrMnNiNbN21-9,X33CrNiMnN23-3, NiCr15Fe7TiAl,NiFe25Cr20NbTi,NiCr20TiAl,21CrMoV5-7,40CrMo5-6,40CrMoV4-6,X12Cr13,X20CrMoNiNbV11-1, X12CrNiMoV12-3,X21CrMoNiV12-2,X12CrMoV12-6,X12CrMo12-6,X11CrNiWTi17-13-3,X6NiCrTiMoVB25-15-2