How to select the right turning grade for Hard Materials?
A mapping of Hard Materials Turning grades and how to select the right one.Material grouping and Grades references for Hard Materials
SMG H (Hard Material) is divided in 8 sub-groups, to capture specific material characteristics and reduce the complexity of every specific material.
Based on grade portfolio, you can find a starting grade recommendation which can be optimized depending on the application, based on below mentioned grade mapping.
| SMG | Description | Reference | Calibration |
| H3 | Case-hardened steels | 16 MnCr 5 | 60 HRC |
| H5 | Quenched & Tempered steels | 42 CrMo 4 | 50 HRC |
| H7 | Quenched & Tempered steels, Bearing steels | 100 Cr 6 | 60 HRC |
| H8 | Tools steels & High-Speed Steels (HSS) | X 40 CrMoV 5 1 | 50 HRC |
| H11 | Martensitic stainless steels | X 20 Cr 13 | 45 HRC |
| H12 | Maraged and precipitation-hardened stainless steels | X 5 CrNiCuNb 16 4 | 1450 N/mm² |
| H21 | Austenitic nodular cast irons | X 120 Mn 12 | 50 HRC |
| H31 | White cast iron | EN-GJN-HV600 (XCr11) | 55 HRC |
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Mapping of Hard Materials Turning grades
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