Hardness Conversion Chart
Tensile Strength | Brinell Hardness | Vickers Hardness | Rockwell Hardness | |||
N/mm2 | kp/mm2 (kgf/mm2) | d(mm) | HB | HV | HRB | HRC |
200 | 20.4 | 7.32 | 60 | 63 | ||
210 | 21.4 | 7.22 | 62 | 65 | ||
220 | 22.4 | 7.04 | 66 | 69 | ||
225 | 22.9 | 6.99 | 67 | 70 | ||
230 | 23.5 | 6.95 | 68 | 72 | ||
240 | 24.5 | 6.82 | 71 | 75 | ||
250 | 25.5 | 6.67 | 75 | 79 | ||
255 | 26 | 6.63 | 76 | 80 | ||
260 | 26.5 | 6.56 | 78 | 82 | ||
270 | 27.6 | 6.45 | 81 | 85 | 41 | |
280 | 28.6 | 6.35 | 84 | 88 | 45 | |
285 | 29.1 | 6.28 | 86 | 86 | 48 | |
285 | 30.6 | 3 | 4 | 5 | ||
290 | 29.6 | 6.25 | 87 | 91 | 49 | |
300 | 30.6 | 6.19 | 89 | 94 | 94 | |
305 | 31.1 | 6.16 | 90 | 95 | 52 | |
310 | 31.6 | 6.10 | 92 | 97 | 54 | |
320 | 32.6 | 6.01 | 95 | 100 | 56 | |
330 | 33.7 | 5.93 | 98 | 103 | 58 | |
335 | 34.2 | 5.87 | 100 | 105 | 59 | |
340 | 34.7 | 5.83 | 102 | 107 | 60 | |
350 | 35.7 | 5.75 | 105 | 110 | 62 | |
360 | 36.7 | 5.70 | 107 | 113 | 63.5 | |
370 | 37.7 | 5.66 | 109 | 115 | 64 | |
380 | 38.7 | 5.57 | 113 | 119 | 66 | |
385 | 39.3 | 5.54 | 114 | 120 | 67 | |
390 | 39.8 | 5.50 | 116 | 122 | 67.5 | |
400 | 40.8 | 5.44 | 119 | 125 | 69 | |
410 | 41.8 | 5.38 | 122 | 128 | 70 | |
415 | 42.3 | 5.33 | 124 | 130 | 71 | |
420 | 42.8 | 5.32 | 125 | 132 | 72 | |
430 | 43.8 | 5.26 | 128 | 135 | 73 | |
440 | 44.9 | 5.20 | 131 | 138 | 74 | |
450 | 45.9 | 5.17 | 133 | 140 | 75 | |
460 | 46.9 | 5.11 | 136 | 143 | 76.5 | |
465 | 47.4 | 5.08 | 138 | 145 | 77 | |
470 | 47.9 | 5.05 | 140 | 147 | 77.5 | |
480 | 48.9 | 5.00 | 143 | 150 | 78.5 | |
490 | 50 | 4.96 | 145 | 153 | 79.55 | |
495 | 50.5 | 4.93 | 147 | 155 | 80 | |
500 | 51 | 4.90 | 149 | 157 | 81 | |
510 | 52 | 4.86 | 152 | 160 | 81.5 | |
520 | 53 | 4.81 | 155 | 163 | 82.5 | |
530 | 54 | 4.78 | 157 | 165 | 83 | |
540 | 55.1 | 4.74 | 160 | 168 | 84.5 | |
545 | 55.6 | 4.71 | 162 | 170 | 85 | |
550 | 56.1 | 4.70 | 163 | 172 | 85.5 | |
560 | 57.1 | 4.66 | 166 | 175 | 86 | |
570 | 58.1 | 4.62 | 169 | 178 | 86.5 | |
575 | 58.6 | 4.59 | 171 | 180 | 87 | |
580 | 59.1 | 4.58 | 172 | 181 | ||
590 | 60.2 | 4.54 | 175 | 184 | 88 | 88 |
595 | 60.7 | 4.53 | 176 | 185 | ||
600 | 61.2 | 4.51 | 178 | 187 | 89 | |
610 | 62.2 | 4.47 | 181 | 190 | 89.5 | |
620 | 63.2 | 4.44 | 184 | 193 | 90 | |
625 | 63.7 | 4.40 | 187 | 197 | 91 | |
630 | 64.2 | 4.40 | 187 | 197 | 91 | |
640 | 65.3 | 4.37 | 190 | 200 | 91.5 | |
650 | 66.3 | 4.34 | 193 | 203 | 92 | |
660 | 67.3 | 4.32 | 195 | 205 | 92.5 | |
670 | 68.3 | 4.29 | 198 | 208 | 93 | |
675 | 68.8 | 4.27 | 199 | 210 | 93.5 | |
680 | 69.3 | 4.25 | 201 | 212 | ||
690 | 70.4 | 4.22 | 204 | 215 | 94 | |
700 | 71.4 | 4.19 | 208 | 219 | ||
705 | 71.9 | 4.18 | 209 | 220 | 95 | |
710 | 72.4 | 4.16 | 211 | 222 | 95.5 | |
720 | 73.4 | 4.13 | 214 | 225 | 96 | |
730 | 74.4 | 4.11 | 216 | 228 | ||
740 | 75.5 | 4.08 | 219 | 230 | 96.5 | |
750 | 76.5 | 4.07 | 221 | 233 | 97 | |
755 | 77 | 4.05 | 223 | 235 | ||
760 | 77.5 | 4.03 | 225 | 237 | 97.5 | |
770 | 78.5 | 4.01 | 228 | 240 | 98 | |
780 | 79.5 | 3.98 | 231 | 243 | 21 | |
785 | 80 | 3.97 | 233 | 245 | ||
790 | 80.6 | 3.95 | 235 | 247 | 99 | |
800 | 81.6 | 3.93 | 238 | 250 | 99.5 | 22 |
810 | 82.6 | 3.91 | 240 | 253 | ||
820 | 83.6 | 3.89 | 242 | 242 | 255 | 23 |
830 | 84.6 | 3.87 | 245 | 258 | ||
835 | 85.1 | 3.85 | 247 | 260 | 24 | |
840 | 85.7 | 3.84 | 3.84 | 262 | ||
850 | 86.7 | 3.82 | 252 | 265 | ||
860 | 87.7 | 3.80 | 255 | 268 | 25 | |
870 | 88.7 | 3.77 | 258 | 272 | 26 | |
880 | 89.7 | 3.76 | 261 | 275 | ||
890 | 90.8 | 3.74 | 264 | 278 | ||
900 | 91.8 | 3.72 | 266 | 280 | 27 | |
915 | 93.3 | 3.69 | 271 | 285 | ||
920 | 93.8 | 3.68 | 273 | 287 | 28 | |
930 | 94.8 | 3.66 | 276 | 290 | ||
940 | 95.9 | 3.64 | 278 | 293 | 29 | |
950 | 96.9 | 3.63 | 280 | 295 | ||
960 | 97.9 | 3.61 | 284 | 299 | ||
965 | 98.4 | 3.60 | 300 | 30 | ||
970 | 98.9 | 3.59 | 287 | 302 | ||
980 | 99.9 | 3.57 | 290 | 305 | ||
990 | 100.9 | 3.55 | 293 | 308 | ||
995 | 101.5 | 3.54 | 295 | 310 | 31 | |
1000 | 102 | 3.53 | 296 | 311 | ||
1010 | 103 | 3.52 | 299 | 314 | ||
1000 | 102 | 3.53 | 296 | 311 | ||
1010 | 103 | 3.52 | 299 | 314 | ||
1020 | 105 | 3.50 | 301 | 317 | 32 | |
1030 | 105 | 3.49 | 304 | 320 | ||
1040 | 106.1 | 3.47 | 307 | 323 | 32 | |
1050 | 107.1 | 3.45 | 311 | 327 | 33 | |
1060 | 108.1 | 3.44 | 314 | 330 | ||
1070 | 109.1 | 3.43 | 316 | 333 | ||
1080 | 110.1 | 3.41 | 319 | 336 | 34 | |
1090 | 111.1 | 3.40 | 322 | 339 | 32 | |
1095 | 111.7 | 3.39 | 323 | 340 | ||
1100 | 112.2 | 3.38 | 328 | 345 | 35 | |
1120 | 114.2 | 3.35 | 332 | 349 | ||
1125 | 114.7 | 3.34 | 333 | 350 | ||
1130 | 115.2 | 3.33 | 334 | 352 | ||
1140 | 116.2 | 3.32 | 337 | 355 | 36 | |
1150 | 117.3 | 3.31 | 340 | 358 | ||
1155 | 117.8 | 3.30 | 342 | 360 | ||
1160 | 118.3 | 3.29 | 343 | 361 | ||
1170 | 119.3 | 3.28 | 346 | 364 | 37 | |
1180 | 120.3 | 3.26 | 349 | 367 | ||
1190 | 121.3 | 3.25 | 352 | 370 | ||
1200 | 122.4 | 3.24 | 354 | 373 | 38 | |
1210 | 123.4 | 3.23 | 357 | 376 | ||
1220 | 124.4 | 3.21 | 361 | 380 | ||
1230 | 125.4 | 3.20 | 363 | 382 | 39 | |
1240 | 126.4 | 3.19 | 366 | 385 | ||
1250 | 127.5 | 3.18 | 369 | 388 | ||
1255 | 128 | 3.17 | 371 | 390 | ||
1260 | 128.5 | 372 | 392 | 40 | ||
1270 | 129.52 | 3.16 | 374 | 394 | ||
1280 | 130.5 | 3.14 | 377 | 397 | ||
1290 | 131.5 | 3.13 | 380 | 400 | ||
1300 | 132.6 | 3.12 | 383 | 403 | 41 | |
1310 | 133.6 | 3.10 | 387 | 407 | ||
1320 | 134.6 | 3.09 | 390 | 410 | ||
1330 | 135.6 | 3.08 | 393 | 413 | 42 | |
1340 | 136.6 | 3.07 | 393 | 417 | ||
1350 | 137.7 | 3.06 | 399 | 420 | ||
1360 | 138.7 | 3.05 | 402 | 423 | 43 | |
1370 | 139.7 | 3.04 | 405 | 426 | ||
1380 | 140.7 | 408 | 429 | |||
1385 | 141.2 | 3.02 | 409 | 430 | ||
1390 | 141.7 | 410 | 431 | |||
1400 | 142.8 | 3.01 | 413 | 434 | 44 | |
1410 | 143.8 | 3.00 | 415 | 437 | ||
1420 | 144.8 | 2.99 | 418 | 440 | ||
1430 | 145.8 | 2.98 | 421 | 443 | ||
1440 | 146.8 | 2.97 | 424 | 446 | 45 | |
1450 | 147.9 | 2.96 | 427 | 449 | ||
1455 | 148.4 | 428 | 450 | |||
1460 | 148.9 | 2.95 | 429 | 452 | ||
1470 | 149.9 | 2.94 | 432 | 455 | ||
1480 | 150.9 | 2.93 | 435 | 458 | 46 | |
1485 | 151.4 | 437 | 460 | |||
1490 | 151.9 | 2.92 | 438 | 461 | ||
1500 | 152.9 | 2.91 | 441 | 464 | ||
1520 | 155 | 2.89 | 447 | 470 | ||
1530 | 156 | 449 | 473 | 47 | ||
1540 | 157 | 2.88 | 425 | 476 | ||
1550 | 158.1 | 2.87 | 455 | 479 | ||
1555 | 158.6 | (456) | 480 | |||
1560 | 159.1 | 2.86 | (457) | 481 | ||
1570 | 160.1 | 2.85 | (460) | 484 | 48 | |
1580 | 161.1 | 2.88 | (462) | 486 | ||
1590 | 162.1 | 2.84 | (465) | 489 | ||
1595 | 162.6 | 2.83 | (466) | 490 | ||
1600 | 163.2 | (467) | 491 | |||
1610 | 164.2 | 2.82 | (470) | 494 | ||
1620 | 164.2 | 165.2 | (472) | 497 | 49 | |
1630 | 166.2 | (475) | 500 | |||
1640 | 167.2 | 2.80 | (478) | 503 | ||
1650 | 168.3 | 2.79 | (481) | 506 | ||
1660 | 169.3 | (483) | 509 | |||
1665 | 169.8 | 2.78 | (485) | 510 | ||
1670 | 170.3 | (486) | 511 | |||
1680 | 171.3 | 2.77 | (488) | 514 | 50 | |
1690 | 172.3 | 2.76 | (491) | 517 | 50 | |
1700 | 173.4 | 2.75 | (494) | 520 | ||
1710 | 174.4 | (496) | 522 | |||
1720 | 175.4 | 2.74 | (499) | 525 | ||
1730 | 176.4 | (501) | 527 | 51 | ||
1740 | 177.4 | 2.73 | (504) | 530 | ||
1750 | 178.5 | 2.72 | (506) | 533 | ||
1760 | 179.5 | 2.71 | (509) | 536 | ||
1770 | 180.5 | (512) | 539 | |||
1775 | 181 | 2.70 | (513) | 540 | ||
1780 | 181.5 | (514) | 541 | |||
1790 | 182.5 | 2.69 | (517) | 544 | 52 | |
1800 | 183.5 | (520) | 547 | |||
1810 | 184.6 | 2.68 | (523) | 550 | ||
1820 | 185.6 | 2.67 | (525) | 553 | ||
1830 | 186.6 | (528) | 556 | |||
1840 | 187.6 | 2.66 | (531) | 559 | ||
1845 | 188.1 | (532) | 560 | 53 | ||
1850 | 188.6 | 2.65 | (533) | 561 | ||
1860 | 189.7 | (536) | 564 | |||
1870 | 190.7 | 2.64 | (539) | 567 | ||
1880 | 191.7 | (542) | 570 | |||
1890 | 192.7 | 2.63 | (543) | 572 | ||
1900 | 193.7 | 2.62 | (546) | 575 | ||
1910 | 194.8 | (549) | 578 | 54 | ||
1920 | 195.8 | 2.61 | (551) | 580 | ||
1930 | 196.8 | 2.60 | (554) | 583 | ||
1940 | 197.8 | (557) | 586 | |||
1950 | 198.8 | 2.59 | (560) | 589 | ||
1955 | 199.4 | (561) | 590 | |||
1960 | 199.9 | (562) | 591 | |||
1970 | 200.9 | 2.58 | (564) | 594 | ||
1980 | 201.9 | (567) | 596 | 55 | ||
1990 | 202.9 | 2.57 | (569) | 599 | ||
1995 | 203.4 | (570) | 600 | |||
2000 | 203.9 | 2.56 | ((572) | 602 | ||
2010 | 205 | (575) | 605 | |||
2020 | 206 | 2.55 | (577) | 607 | ||
2030 | 207 | (580) | 610 | |||
2040 | 208 | 2.54 | (582) | 613 | ||
2050 | 209 | (584) | 615 | 56 | ||
2060 | 210.1 | 2.53 | (587) | 618 | ||
2070 | 211.1 | (589) | 620 | |||
2080 | 212.1 | 2.52 | (592) | 623 | ||
2090 | 213.1 | (595) | 626 | |||
2100 | 214.1 | 2.51 | (598) | 629 | ||
2105 | 214.7 | (599) | 630 | |||
2110 | 215.2 | (600) | 631 | |||
2120 | 216.2 | 2.50 | (602) | 634 | ||
2130 | 217.2 | (604) | 636 | |||
2140 | 218.2 | 2.49 | (607) | 639 | 57 | |
2150 | 219.2 | (609) | 641 | |||
2160 | 220.3 | 2.48 | (612) | 644 | ||
2170 | 221.3 | 2.47 | (615) | 647 | ||
2180 | 222.3 | (618) | 650 | |||
2190 | 223.3 | (620) | 653 | |||
2200 | 224.3 | 2.46 | (622) | 655 | 58 | |
675 | 59 | |||||
698 | 60 | |||||
720 | 61 | |||||
745 | 62 | |||||
773 | 63 | |||||
800 | 64 | |||||
829 | 65 | |||||
864 | 66 | |||||
900 | 67 | |||||
940 | 68 |