Hardness Conversion Table
| TENSILE STRENGTH (N/mm²) | VICKERS HARDNESS (HV) | BRINELL HARDNESS (HB) | Rockwell Hardness (HRc) |
| 320 | 100 | 95 | – |
| 1155 | 360 | 342 | 36.6 |
| 335 | 105 | 99.8 | – |
| 1,190 | 370 | 352 | 37.7 |
| 350 | 110 | 105 | – |
| 1,220 | 380 | 361 | 38.8 |
| 370 | 115 | 109 | – |
| 1,255 | 390 | 371 | 39.8 |
| 385 | 120 | 115 | – |
| 1,290 | 400 | 380 | 40.8 |
| 400 | 125 | 119 | – |
| 1,320 | 410 | 390 | 41.8 |
| 415 | 130 | 124 | – |
| 1,350 | 420 | 399 | 42.7 |
| 430 | 135 | 128 | – |
| 1,385 | 430 | 409 | 43.6 |
| 450 | 140 | 133 | – |
| 1,420 | 440 | 418 | 44.5 |
| 465 | 145 | 138 | – |
| 1,455 | 450 | 428 | 45.3 |
| 480 | 150 | 143 | – |
| 1,485 | 460 | 437 | 46.1 |
| 495 | 155 | 147 | – |
| 1,520 | 470 | 447 | 46.9 |
| 510 | 160 | 152 | – |
| 1,555 | 480 | (456) | 47.7 |
| 530 | 165 | 156 | – |
| 1,595 | 490 | (466) | 48.4 |
| 545 | 170 | 162 | – |
| 1,630 | 500 | (476) | 49.1 |
| 560 | 175 | 166 | – |
| 1,665 | 510 | (485) | 49.8 |
| 575 | 180 | 171 | – |
| 1,700 | 520 | (494) | 50.5 |
| 595 | 185 | 176 | – |
| 1,740 | 530 | (504) | 51.1 |
| 610 | 190 | 181 | – |
| 1,775 | 540 | (513) | 51.7 |
| 625 | 195 | 185 | – |
| 1,810 | 550 | (523) | 52.3 |
| 640 | 200 | 190 | – |
| 1,845 | 560 | (532) | 53.0 |
| 660 | 205 | 195 | – |
| 1,880 | 570 | (542) | 53.6 |
| 675 | 210 | 199 | – |
| 1920 | 580 | (551) | 54.1 |
| 690 | 215 | 204 | – |
| 1955 | 590 | (561) | 54.7 |
| 705 | 220 | 209 | – |
| 1995 | 600 | (570) | 55.2 |
| 720 | 225 | 214 | – |
| 2030 | 610 | (580) | 55.7 |
| 740 | 230 | 219 | – |
| 2,070 | 620 | (589) | 56.3 |
| 755 | 235 | 223 | – |
| 2,105 | 630 | (599) | 56.8 |
| 770 | 240 | 228 | 20.3 |
| 2,145 | 640 | (608) | 57.3 |
| 785 | 245 | 233 | 21.3 |
| 2,180 | 650 | (618) | 57.8 |
| 800 | 250 | 238 | 22.2 |
| TENSILE STRENGTH (N/mm²) | VICKERS HARDNESS (HV) | BRINELL HARDNESS (HB) | Rockwell Hardness (HRc) |
| – | 660 | – | 58.3 |
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