A.Material Hardness Values
| Hardness Value HRC |
Hardness value HRB |
Hardness Value Vickers |
Hardness Value Brinnell |
N/mm2 | Symbols DIN | ||
| -20 | 67 | 114 | 114 | 400 | C15 | ||
| -9 | 74 | 131 | 131 | 460 | C10 | ||
| 1 | 83 | 154 | 156 | 560 | C40 | stainless 303 | |
| 10 | 90 | 183 | 182 | 635 | |||
| 15 | 93 | 199 | 200 | 680 | C55 | 42CrMo4 | 32CrMo12 |
| 20 | 97 | 221 | 224 | 760 | 34CrNiMo6 14NiCr14 | ||
| 25 | 101 | 250 | 249 | 850 | 34CrNiMo6 pretreated | ||
| 30 | 105 | 278 | 276 | 955 | |||
| 35 | 109 | 320 | 323 | 1110 | |||
| 40 | 112 | 385 | 370 | 1270 | |||
| 45 | 115 | 460 | 427 | 1453 | C40 hardened |
||
| 50 | 118 | 535 | 497 | 1670 | 34CrNiMo6 hardened |
32NiCrMo45 hardened |
42CrMo4 hardened |
| 55 | 639 | 545 | 1870 | C35 hardened | |||
| 57 | 694 | 576 | 1940 | ||||
| 60 | 746 | 601 | 2110 | 14NiCr14 hardened |
C10 hardened |
||
| 63 | 867 | 652 | 2220 | 32CrMo12 nitrited |
|||
| 65 | 940 | 682 | 2300 | ||||
| 67 | 1060 | 725 | 2400 | ||||
| 70 | 1170 | 760 | 2640 | ||||
B. Material Hardness (Heat Treatment)
temperature |
method |
level obtained |
|||
| Quenched | |||||
| C40 | 830/860°C | in an oil bath for 1h/25 mm |
Hold at 650°C + Cool for one hour in an oven or in the open air |
||
| C55 | 810/840°C | in an oil bath for 1h/25 mm |
Hold at 650°C + cool for one hour in an oven or in the open air |
||
| 42CrMo4 | 860/890°C | in an oil bath for 1h/25 mm |
Hold at 690°C + cool for one hour in an oven or in the open air |
||
| 34CrNiMo6 | 820/850°C | in an oil bath for 1h/25 mm |
Hold at 650°C + cool for one hour in an oven or in the open air |
||
| Cementation | |||||
| C10<Ø100 | 900 to 930°C for 1h cementation depth 0,2mm |
770/790°C | 150 to 200°C in an oil bath 1h/25 mm |
Hold at 650°C + cool for one hour in an oven or in the open air |
|
| C10>Ø100 | 900-930°C for 1h cementation depth 0,2mm |
900/930°C | in an oil bath 1h/25 mm |
Hold at 650°C + cool for one hour in an oven or in the open air |
|
| 12NiCr14 | for 1h cementation depth 0,2mm |
820/840°C | in an oil bath 1h/25 mm |
Hold at 650°C + cool for one hour in an oven or in the open air |
|
| *Do not stock or use at temperatures between 250 and 450°C All values are approximate |
|||||