18MnMoNbR and 13MnNIMoR

2016-09-02View Original

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According to the standards, 18MnMoNbR and 13MnNIMoR have identical performance up to 400 degrees; so how is the choice made in practical engineering applications?

Reply #22016-09-02

The chemical compositions are different, especially the carbon content; 18MnMoNbR has a higher carbon content, which makes it somewhat more difficult to weld. The 13MnNIMoR is the one that is commonly used.

Reply #32016-09-02

The application temperature for 18MnMoNbR should be higher than that of 13MnNIMoR; when high-temperature creep strength is required, values are available for 18MnMoNbR, but not for 13MnNIMoR. See GB150.2 Appendix Table B.9.

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18MnMoNbR and 13MnNIMoR

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