Material issues

2009-02-24View Original

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It seems to be: 20R→Q245R, 16MnR→Q345R. So for 6654: 15MnVR→? 15MnVNR→? 18MnMoNbR→? 13MnNiMoNbR→? 15GrMoR→? Does anyone know the answers? Please let me know

Reply #22009-02-24

13MnNiMoNbR→13MnNiMoR

Reply #32009-02-24

As stated in the preface of GB713-2008: 20R, 20G → Q245R; 16MnR, 16Mng, 19Mng → Q345R; 13MnNiMoNbR → 13MnNiMoR; 15GrMoR → 15GrMoR; 18MnMoNbR → 18MnMoNbR. 15MnVR and 15MnVNR are classified under 14Gr1MoR and 12Gr2Mo1R

Reply #42009-02-25

Oh. Thank you all. I found GB713-2008; I’ve seen it. ,

Reply #52009-02-25

Comparison table of old and new standard grades: GB713-2008, GB713-1997, GB6654-1996. Q245R → 20g, 20R; Q345R → 16Mng, 19Mng, 16MnR; Q370R → 15MnNbR, 18MnMoNbR, 13MnNiMoR, 13MnNiCrMoNbg, 13MnNiMoNbR; 15CrMoR, 15CrMog, 12Cr1MoVR, 12Cr1MoVg, 14Cr1MoR, 12Cr2Mo1R

Reply #62009-02-25

The changes in the names of materials are explained in the preamble of GB713‑2008. If you don’t have an electronic version of GB713‑2008, feel free to contact me

Reply #72009-02-25

Refer to Appendix A of GB713-2008

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