Steel Hardness Conversion Table
This table shows approximate hardness of steel using Brinell, Rockwell B and C and Vickers scales. These conversion charts are provided for guidance only as each scales uses different methods of measuring hardness. The right hand column show an approximate equivalent tensile strength.
Steel Hardness conversion calculator
Enter a figure into any of the fields and click calculate, the nearest values in each scale is shown, or zero if out of range. Values are approximate and for guidance only.
| Brinell (HB) | Rockwell C (HRC) | Rockwell B (HRB) | Vickers (HV) | Tensile Strength (N/mm²) |
|---|---|---|---|---|
| 800 | 72 | – | – | – |
| 780 | 71 | – | – | – |
| 760 | 70 | – | – | – |
| 752 | 69 | – | – | – |
| 745 | 68 | – | – | – |
| 746 | 67 | – | – | – |
| 735 | 66 | – | – | – |
| 711 | 65 | – | – | – |
| 695 | 64 | – | – | – |
| 681 | 63 | – | – | – |
| 658 | 62 | – | – | – |
| 642 | 61 | – | – | – |
| 627 | 60 | – | – | – |
| 613 | 59 | – | – | – |
| 601 | 58 | – | 746 | – |
| 592 | 57 | – | 727 | – |
| 572 | 56 | – | 694 | – |
| 552 | 55 | – | 649 | – |
| 534 | 54 | 120 | 589 | - |
| 513 | 53 | 119 | 567 | - |
| 504 | 52 | 118 | 549 | - |
| 486 | 51 | 118 | 531 | - |
| 469 | 50 | 117 | 505 | - |
| 468 | 49 | 117 | 497 | - |
| 456 | 48 | 116 | 490 | 1569 |
| 445 | 47 | 115 | 474 | 1520 |
| 430 | 46 | 115 | 458 | 1471 |
| 419 | 45 | 114 | 448 | 1447 |
| 415 | 44 | 114 | 438 | 1422 |
| 402 | 43 | 114 | 424 | 1390 |
| 388 | 42 | 113 | 406 | 1369 |
| 375 | 41 | 112 | 393 | 1314 |
| 373 | 40 | 111 | 388 | 1265 |
| 360 | 39 | 111 | 376 | 1236 |
| 348 | 38 | 110 | 361 | 1187 |
| 341 | 37 | 109 | 351 | 1157 |
| 331 | 36 | 109 | 342 | 1118 |
| 322 | 35 | 108 | 332 | 1089 |
| 314 | 34 | 108 | 320 | 1049 |
| 308 | 33 | 107 | 311 | 1035 |
| 300 | 32 | 107 | 303 | 1020 |
| 290 | 31 | 106 | 292 | 990 |
| 277 | 30 | 105 | 285 | 971 |
| 271 | 29 | 104 | 277 | 941 |
| 264 | 28 | 103 | 271 | 892 |
| 262 | 27 | 103 | 271 | 880 |
| 255 | 26 | 102 | 258 | 870 |
| 250 | 25 | 101 | 255 | 853 |
| 245 | 24 | 100 | 252 | 838 |
| 240 | 23 | 100 | 247 | 824 |
| 233 | 22 | 99 | 241 | 794 |
| 229 | 21 | 98 | 235 | 775 |
| 223 | 20 | 97 | 227 | 755 |
| 216 | 19 | 96 | 222 | 716 |
| 212 | 18 | 95 | 218 | 706 |
| 208 | 17 | 95 | 210 | 696 |
| 203 | 16 | 94 | 201 | 680 |
| 199 | 15 | 93 | 199 | 667 |
| 191 | 14 | 92 | 197 | 657 |
| 190 | 13 | 92 | 186 | 648 |
| 186 | 12 | 91 | 184 | 637 |
| 183 | 11 | 90 | 183 | 617 |
| 180 | 10 | 89 | 180 | 608 |
| 175 | 9 | 88 | 178 | 685 |
| 170 | 7 | 87 | 175 | 559 |
| 167 | 6 | 86 | 172 | 555 |
| 166 | 5 | 86 | 168 | 549 |
| 163 | 4 | 85 | 162 | 539 |
| 160 | 3 | 84 | 160 | 535 |
| 156 | 2 | 83 | 158 | 530 |
| 154 | 1 | 82 | 152 | 515 |
| 149 | – | 81 | 149 | 500 |
| 147 | – | 80 | 147 | 490 |
| 143 | – | 79 | 146 | 482 |
| 141 | – | 78 | 144 | 481 |
| 139 | – | 77 | 142 | 480 |
| 137 | – | 76 | 140 | 475 |
| 135 | – | 75 | 137 | 467 |
| 131 | – | 74 | 134 | 461 |
| 127 | – | 72 | 129 | 451 |
| 121 | – | 70 | 127 | 431 |
| 116 | – | 68 | 124 | 422 |
| 114 | – | 67 | 121 | 412 |
| 111 | – | 66 | 118 | 402 |
| 107 | – | 64 | 115 | 382 |
| 105 | – | 62 | 112 | 378 |
| 103 | – | 61 | 108 | 373 |
| 95 | – | 56 | 104 | – |
| 90 | – | 52 | 95 | – |
| 81 | – | 41 | 85 | – |
| 76 | – | 37 | 80 | – |
| Brinell HB 3000kg 10mm Ball |
Rockwell HRC 150kg Brale |
Rockwell HRB 100kg 1/16" Ball |
Vickers HV Diamond Pyramid 120kg |
N/mm² Tensile strength (Approx) |
Reference table: Steel Hardness conversion chart
Since the various types of hardness tests do not all measure the same combination of material properties, conversion from one hardness scale to another is only an approximate process. Because of the wide range of variation among different materials, it is not possible to state confidence limits for the errors in using a conversion table.
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