Hardness Comparison Tables
What is Hardness?
Hardness should be considered as the material property and its ability to resist plastic deformation, usually by penetration. However, the expression 'hardness' in this context may also refer to its scratching, bending, abrasion or cutting resistance.
Measurement of Hardness
All tables and charts should be considered as giving approximate equivalents, particularly when converting to a method or scale which is not physically possible for the particular test material and thus cannot be verified. An example would be converting HV/10 or HR-15N value on a thin coating to the HRC equivalent.
The data in the following table is approximate
| Brinell 10mm Ball | Firth or Vickers 120kg | C Scale 120 degree cone | B Scale 1/16™ ball |
|---|---|---|---|
| 3000kg load | 120kg load | 150kg load | 100kg load |
| 800 | - | 72 | - |
| 780 | 1220 | 71 | - |
| 760 | 1170 | 70 | - |
| 745 | 1114 | 68 | - |
| 725 | 1060 | 67 | - |
| 712 | 1021 | 66 | - |
| 682 | 940 | 65 | - |
| 668 | 905 | 64 | - |
| 652 | 867 | 63 | - |
| 626 | 803 | 62 | - |
| 614 | 775 | 61 | - |
| 601 | 746 | 60 | - |
| Brinell 10mm Ball | Firth or Vickers 120kg | C Scale 120 degree cone | B Scale 1/16™ ball |
|---|---|---|---|
| 3000kg load | 120kg load | 150kg load | 100kg load |
| 552 | 649 | 56 | - |
| 545 | 639 | 55 | - |
| 529 | 606 | 54 | - |
| 514 | 587 | 53 | 120 |
| 502 | 565 | 52 | 119 |
| 495 | 551 | 51 | 119 |
| 477 | 534 | 49 | 118 |
| 461 | 502 | 48 | 117 |
| 451 | 489 | 47 | 117 |
| 444 | 474 | 46 | 116 |
| 427 | 460 | 45 | 115 |
| 415 | 435 | 44 | 115 |
| Brinell 10mm Ball | Firth or Vickers 120kg | C Scale 120 degree cone | B Scale 1/16™ ball |
|---|---|---|---|
| 3000kg load | 120kg load | 150kg load | 100kg load |
| 401 | 423 | 43 | 114 |
| 388 | 401 | 42 | 114 |
| 374 | 390 | 41 | 113 |
| 370 | 385 | 40 | 112 |
| 362 | 380 | 39 | 111 |
| 351 | 361 | 38 | 111 |
| 346 | 352 | 37 | 110 |
| 341 | 344 | 37 | 110 |
| 331 | 335 | 36 | 109 |
| 323 | 320 | 35 | 109 |
| 311 | 312 | 34 | 108 |
| 301 | 305 | 33 | 107 |
| Brinell 10mm Ball | Firth or Vickers 120kg | C Scale 120 degree cone | B Scale 1/16™ ball |
|---|---|---|---|
| 3000kg load | 120kg load | 150kg load | 100kg load |
| 293 | 291 | 32 | 106 |
| 285 | 285 | 31 | 105 |
| 276 | 278 | 30 | 105 |
| 269 | 272 | 29 | 104 |
| 261 | 261 | 28 | 103 |
| 258 | 258 | 27 | 102 |
| 255 | 255 | 27 | 102 |
| 249 | 250 | 26 | 101 |
| 245 | 246 | 25 | 100 |
| 240 | 240 | 24 | 99 |
| 237 | 235 | 23 | 99 |
| 229 | 226 | 22 | 98 |
| Brinell 10mm Ball | Firth or Vickers 120kg | C Scale 120 degree cone | B Scale 1/16™ ball |
|---|---|---|---|
| 3000kg load | 120kg load | 150kg load | 100kg load |
| 224 | 221 | 21 | 97 |
| 217 | 217 | 20 | 96 |
| 211 | 213 | 19 | 95 |
| 206 | 209 | 18 | 94 |
| 203 | 201 | 17 | 94 |
| 200 | 199 | 16 | 93 |
| 196 | 197 | 15 | 92 |
| 191 | 190 | 14 | 92 |
| 187 | 186 | 13 | 91 |
| 185 | 184 | 12 | 91 |
| 183 | 183 | 11 | 90 |
| 180 | 177 | 10 | 89 |
| Brinell 10mm Ball | Firth or Vickers 120kg | C Scale 120 degree cone | B Scale 1/16™ ball |
|---|---|---|---|
| 3000kg load | 120kg load | 150kg load | 100kg load |
| 175 | 174 | 9 | 88 |
| 170 | 171 | 7 | 87 |
| 167 | 168 | 6 | 87 |
| 165 | 165 | 5 | 86 |
| 163 | 162 | 4 | 85 |
| 160 | 159 | 3 | 84 |
| 156 | 154 | 2 | 83 |
| 154 | 152 | 1 | 82 |
| 152 | 150 | - | 82 |
| 150 | 149 | - | 81 |
| 147 | 147 | - | 80 |
| 145 | 146 | - | 79 |
| Brinell 10mm Ball | Firth or Vickers 120kg | C Scale 120 degree cone | B Scale 1/16™ ball |
|---|---|---|---|
| 3000kg load | 120kg load | 150kg load | 100kg load |
| 143 | 144 | - | 79 |
| 141 | 142 | - | 78 |
| 140 | 141 | - | 77 |
| 135 | 135 | - | 75 |
| 130 | 130 | - | 72 |
Note: Due to the fact that fastening applications differ greatly, the above information is for guidance only and is correct to the best of our knowledge. The customer must satisfy themselves with the performance of the fastener and validity of the data. TR Fastenings will not be held responsible for any failure that may occur from the use of this information.