阀门用钢 X50NiCrWv13-13 1.2731 X40MnCr18 1.3817 45SiCr16-11 1.4704 X45CrSi9-3 1.4718 X40CrSiMo10-2 1.4731 X80CrSiMoW15-2 1.4732 X85CrMoV18-2 1.4785 X60CrMnMoVNbN21-10 1.4785 X33CrNiMnN23-8 1.4866 X53CrMnNiNbN21-9 1.4870 X53CrMnNiN21-9 1.4871 X45CrNiW18-9 1.4873 X55CrMnNiN20-8

 

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