Hardness comparison
There are a large number of hardness testing methods available (e.g. Vickers, Brinell, Rockwell, Meyer and Leeb). Although it is impossible in many cases to give an exact conversion, it is possible to give an approximate material-specific comparison table e.g. for steels.
Hardness comparison table
| Brinell HB (10 mm Ball, 3000 kg load) |
Vickers HV (1 kg) |
Rockwell C HRC (120 degree cone 150 kg) |
Rockwell B HRB (1/16" ball 100 kg) |
Leeb HLD[1] |
|---|---|---|---|---|
| 800 | - | 72 | - | 856 |
| 780 | 1220 | 71 | - | 850 |
| 760 | 1210 | 70 | - | 843 |
| 745 | 1114 | 68 | - | 837 |
| 725 | 1060 | 67 | - | 829 |
| 712 | 1021 | 66 | - | 824 |
| 682 | 940 | 65 | - | 812 |
| 668 | 905 | 64 | - | 806 |
| 652 | 867 | 63 | - | 799 |
| 626 | 803 | 62 | - | 787 |
| 614 | 775 | 61 | - | 782 |
| 601 | 746 | 60 | - | 776 |
| 590 | 727 | 59 | - | 770 |
| 576 | 694 | 57 | - | 763 |
| 552 | 649 | 56 | - | 751 |
| 545 | 639 | 55 | - | 748 |
| 529 | 606 | 54 | - | 739 |
| 514 | 587 | 53 | 120 | 731 |
| 502 | 565 | 52 | 119 | 724 |
| 495 | 551 | 51 | 119 | 719 |
| 477 | 534 | 49 | 118 | 709 |
| 461 | 502 | 48 | 117 | 699 |
| 451 | 489 | 47 | 117 | 693 |
| 444 | 474 | 46 | 116 | 688 |
| 427 | 460 | 45 | 115 | 677 |
| 415 | 435 | 44 | 115 | 669 |
| 401 | 423 | 43 | 114 | 660 |
| 388 | 401 | 42 | 114 | 650 |
| 375 | 390 | 41 | 113 | 640 |
| 370 | 385 | 40 | 112 | 635 |
| 362 | 380 | 39 | 111 | 630 |
| 351 | 361 | 38 | 111 | 622 |
| 346 | 352 | 37 | 110 | 617 |
| 341 | 344 | 37 | 110 | 613 |
| 331 | 335 | 36 | 109 | 605 |
| 323 | 320 | 35 | 109 | 599 |
| 311 | 312 | 34 | 108 | 588 |
| 301 | 305 | 33 | 107 | 579 |
| 293 | 291 | 32 | 106 | 572 |
| 285 | 285 | 31 | 105 | 565 |
| 276 | 278 | 30 | 105 | 557 |
| 269 | 272 | 29 | 104 | 550 |
| 261 | 261 | 28 | 103 | 542 |
| 258 | 258 | 27 | 102 | 539 |
| 249 | 250 | 25 | 101 | 530 |
| 245 | 246 | 24 | 100 | 526 |
| 240 | 240 | 23 | 99 | 521 |
| 237 | 235 | 23 | 99 | 518 |
| 229 | 226 | 22 | 98 | 510 |
| 224 | 221 | 21 | 97 | 505 |
| 217 | 217 | 20 | 96 | 497 |
| 211 | 213 | 19 | 95 | 491 |
| 206 | 209 | 18 | 94 | 485 |
| 203 | 201 | 17 | 94 | 482 |
| 200 | 199 | 16 | 93 | 478 |
| 196 | 197 | 15 | 92 | 474 |
| 191 | 190 | 14 | 92 | 468 |
| 187 | 186 | 13 | 91 | 463 |
| 185 | 184 | 12 | 91 | 461 |
| 183 | 183 | 11 | 90 | 459 |
| 180 | 177 | 10 | 89 | 455 |
| 175 | 174 | 9 | 88 | 449 |
| 170 | 171 | 7 | 87 | 443 |
| 167 | 168 | 6 | 87 | 439 |
| 165 | 165 | 5 | 86 | 437 |
| 163 | 162 | 4 | 85 | 434 |
| 160 | 159 | 3 | 84 | 430 |
| 156 | 154 | 2 | 83 | 425 |
| 154 | 152 | 1 | 82 | 423 |
| 152 | 150 | - | 82 | 420 |
| 150 | 149 | - | 81 | 417 |
| 147 | 147 | - | 80 | 413 |
| 145 | 146 | - | 79 | 411 |
| 143 | 144 | - | 79 | 408 |
| 141 | 142 | - | 78 | 405 |
| 140 | 141 | - | 77 | 404 |
| 135 | 135 | - | 75 | 397 |
| 130 | 130 | - | 72 | 390 |
| 114 | 120 | - | 67 | 365 |
| 105 | 110 | - | 62 | 350 |
| 95 | 100 | - | 56 | 331 |
| 90 | 95 | - | 52 | 321 |
| 81 | 85 | - | 41 | 300 |
| 76 | 80 | - | 37 | 287 |
References
- ^ H.Pollok, „Umwertung der Skalen“ (“Conversion of Scales”), Qualität und Zuverlässigkeit, Ausgabe 4/2008.
External links
- Hardness Conversion Table – Brinell, Rockwell,Vickers – Various steels
- Rockwell to Brinell conversion chart (Brinell, Rockwell A,B,C)
- Struers hardness conversion table (Vickers, Brinell, Rockwell B,C,D)