Hardness Conversion Table for Steel and Cast Steel
| Conversion on hardness values resulting from the various methods of
testing should be avoided whenever possible because it always involves errors.
specifications should therefore give hardness values of such testing procedures which are actually used in testing.
However, in some instances a conversion is necessary. The following compilation is taken from
the "Werkstoffhandbuch For stahl und Eisen" (Handbook for steel and iron) third edition, and is reproduced by permission of "Verlag Stahleisen m.b.H", Dusseldorf, Germany. |
The hardness values which are not within the range of application are given in parentheses.
Mean Values Mean Values
| HV | HB | HRc. | HRc
62.5 |
HRb | Shore | Ultimate Tensile
strength kg/mm2 Ós:ÓB .100= >80 |
65-80 |
<65 |
HV | HB | HRc | HRc
62.5 |
HRb | Shore | Ultimate Tensile
strength kg/mm Ós:ÓB .100= >80 / 65-80/ <65 |
| 60 | (2.6) | 440 | 423 | 44.4 | 72.3 | 60.7 | |||||||||
| 65 | (13.1) | 445 | 426 | 44.8 | 72.5 | 61.2 | |||||||||
| 70 | (22.0) | 450 | 430 | 45.1 | 72.6 | 61.8 | |||||||||
| 75 | (29.7) | 455 | 434 | 45.5 | 72.8 | 62.3 | |||||||||
| 80 | 36.4 | 460 | 45.8 | 73.0 | 62.8 | ||||||||||
| 85 | 42.3 | 465 | 46.2 | 73.2 | 63.4 | ||||||||||
| 90 | 47.5 | 470 | 46.5 | 73.4 | 63.9 | ||||||||||
| 95 | 52.1 | 475 | 46.9 | 73.6 | 64.4 | ||||||||||
| 100 | 56.3 | 12.7 | 34.6 | 36.1 | 480 | 47.2 | 73.7 | 64.9 | |||||||
| 105 | 60.0 | 13.4 | 36.2 | 37.8 | 485 | 47.5 | 73.9 | 65.4 | |||||||
| 110 | 63.4 | 14.2 | 37.9 | 39.5 | 490 | 47.9 | 74.1 | 65.9 | |||||||
| 115 | 66.5 | 15.0 | 39.4 | 41.3 | 495 | 48.2 | 74.3 | 66.4 | |||||||
| 120 | 69.5 | 15.8 | 41.0 | 43.0 | 500 | 48.5 | 74.4 | 66.9 | |||||||
| 125 | 71.9 | 16.7 | 42.6 | 44.7 | 510 | 49.1 | 74.7 | 67.8 | |||||||
| 130 | 74.3 | 17.5 | 44.3 | 46.5 | 520 | 49.7 | 75.1 | 68.8 | |||||||
| 135 | 76.5 | 18.3 | 46.1 | 48.3 | 530 | 50.3 | 75.4 | 69.7 | |||||||
| 140 | 78.5 | 19.1 | 47.9 | 50.0 | 540 | 50.9 | 75.7 | 70.6 | |||||||
| 145 | 80.4 | 19.9 | 49.5 | 51.6 | 550 | 51.4 | 76.0 | 71.5 | |||||||
| 150 | (1.6) | 82.2 | 20.7 | 49.2 | 51.0 | 53.7 | 560 | 51.9 | 76.2 | 72.4 | |||||
| 155 | (3.2) | 83.8 | 21.5 | 51.0 | 52.9 | 55.4 | 570 | 52.5 | 76.5 | 73.3 | |||||
| 160 | (4.8) | 85.4 | 22.3 | 52.7 | 54.8 | 57.0 | 580 | 53.0 | 76.8 | 74.1 | |||||
| 165 | (6.3) | 86.8 | 23.1 | 54.1 | 56.4 | 58.9 | 590 | 53.5 | 77.1 | 75.0 | |||||
| 170 | (7.7) | 88.2 | 23.9 | 55.7 | 58.0 | 60.7 | 600 | 54.0 | 77.3 | 75.8 | |||||
| 175 | (9.0) | 89.5 | 24.7 | 57.4 | 59.7 | 62.5 | 610 | 54.5 | 77.6 | 76.6 | |||||
| 180 | (10.3) | 90.7 | 25.5 | 59.0 | 61.6 | 64.3 | 620 | 55.0 | 77.9 | 77.4 | |||||
| 185 | (11.5) | 91.8 | 26.3 | 60.7 | 63.4 | 66.1 | 630 | 55.4 | 78.1 | 78.2 | |||||
| 190 | (12.7) | 92.9 | 27.1 | 62.5 | 65.0 | 67.9 | 640 | 55.9 | 78.3 | 78.9 | |||||
| 195 | (13.9) | 93.9 | 27.9 | 64.0 | 66.9 | 69.5 | 650 | 56.3 | 78.6 | 79.7 | |||||
| 200 | (15.0) | 94.9 | 28.7 | 65.8 | 68.6 | 71.5 | 660 | 56.8 | 78.8 | 80.4 | |||||
| 205 | (16.1) | 95.8 | 29.5 | 67.5 | 70.5 | 73.3 | 670 | 57.2 | 79.0 | 81.1 | |||||
| 210 | (17.1) | 96.6 | 30.2 | 69.0 | 72.0 | 75.1 | 680 | 57.6 | 79.2 | 81.8 | |||||
| 215 | (18.1) | 97.5 | 31.0 | 71.0 | 74.0 | 77.0 | 690 | 58.0 | 79.4 | 82.5 | |||||
| 220 | (19.0) | 98.3 | 31.8 | 72.7 | 75.9 | 78.9 | 700 | 58.4 | 79.6 | 83.2 | |||||
| 225 | 20.0 | 99.0 | 32.5 | 74.5 | 77.5 | 80.7 | 710 | 58.8 | 79.9 | 83.9 | |||||
| 230 | 20.9 | 99.7 | 33.3 | 76.1 | 79.4 | 82.6 | 720 | 59.2 | 80.1 | 84.6 | |||||
| 235 | 21.7 | (100.4) | 34.1 | 78.0 | 81.3 | 84.2 | 730 | 59.6 | 80.3 | 85.2 | |||||
| 240 | 22.6 | (101.1) | 34.8 | 79.8 | 83.0 | 86.3 | 740 | 60.0 | 80.5 | 85.8 | |||||
| 245 | 23.4 | (101.7) | 35.6 | 81.5 | 84.8 | 88.5 | 750 | 60.3 | 80.7 | 86.5 | |||||
| 250 | 24.2 | (102.3) | 36.3 | 83.0 | 86.7 | 90.0 | 760 | 60.7 | 80.9 | 87.1 | |||||
| 255 | 25.0 | (102.9) | 37.0 | 84.9 | 88.5 | 770 | 61.0 | 81.0 | 87.7 | ||||||
| 260 | 25.8 | (103.5) | 37.8 | 86.8 | 90.2 | 780 | 61.4 | 81.2 | 88.3 | ||||||
| 265 | 26.5 | (104.0) | 38.5 | 88.5 | 92.0 | 790 | 61.8 | 81.4 | 88.9 | ||||||
| 270 | 27.2 | (104.5) | 39.2 | 90.2 | 93.9 | 800 | 62.1 | 81.6 | 89.5 | ||||||
| 275 | 27.9 | (105.0) | 40.0 | 92.1 | 95.6 | 810 | 62.4 | 81.8 | 90.1 | ||||||
| 280 | 28.6 | (105.5) | 40.7 | 93.9 | 97.6 | 820 | 62.7 | 81.9 | 90.6 | ||||||
| 285 | 29.3 | (105.9) | 41.4 | 95.7 | 99.5 | 830 | 63.1 | 82.1 | 91.1 | ||||||
| 290 | 29.9 | (106.4) | 42.1 | 98.5 | 101.3 | 840 | 63.4 | 82.3 | 91.7 | ||||||
| 295 | 30.6 | (106.8) | 42.8 | 99.3 | 103.0 | 850 | 63.7 | 82.4 | 92.2 | ||||||
| 300 | 31.2 | 65.3 | (107.2) | 43.5 | 101.0 | 104.9 | 860 | 64.0 | 82.6 | 92.7 | |||||
| 305 | 31.8 | 65.6 | (107.6) | 44.2 | 103.0 | 106.7 | 870 | 64.3 | 82.8 | 93.2 | |||||
| 310 | 32.4 | 65.9 | (108.0) | 44.8 | 104.8 | 108.6 | 880 | 64.6 | 82.9 | 93.7 | |||||
| 315 | 33.0 | 66.2 | (108.4) | 45.5 | 106.5 | 110.5 | 890 | 64.9 | 83.1 | 94.2 | |||||
| 320 | 33.5 | 66.5 | (108.7) | 46.2 | 108.2 | 112.6 | 900 | 65.2 | 83.2 | 94.7 | |||||
| 325 | 34.1 | 66.8 | (109.1) | 46.9 | 110.1 | 114.5 | 910 | 65.4 | 83.4 | 95.2 | |||||
| 330 | 34.7 | 67.1 | (109.4) | 47.5 | 112.0 | 116.4 | 920 | 65.7 | 83.5 | 95.7 | |||||
| 335 | 35.2 | 67.4 | (109.8) | 48.2 | 114.0 | 118.5 | 930 | 66.0 | 83.7 | 96.2 | |||||
| 340 | 35.7 | 67.7 | (110.1) | 48.8 | 115.9 | 120.4 | 940 | 66.3 | 83.8 | 96.6 | |||||
| 345 | 36.2 | 67.9 | (110.4) | 49.5 | 117.7 | 950 | 66.5 | 83.9 | 97.1 | ||||||
| 350 | 36.7 | 68.2 | (110.7) | 50.1 | 119.7 | 960 | 66.8 | 84.1 | 97.5 | ||||||
| 355 | 37.2 | 68.5 | (111.0) | 50.7 | 121.5 | 970 | (67.1) | 84.2 | 98.0 | ||||||
| 360 | 359 | 37.7 | 68.7 | (111.3) | 51.4 | 123.3 | 980 | (67.3) | 84.4 | 98.4 | |||||
| 365 | 364 | 38.2 | 69.0 | (111.5) | 52.0 | 125.3 | 990 | (67.6) | 84.5 | 98.8 | |||||
| 370 | 368 | 38.6 | 69.2 | (111.8) | 52.6 | 127.0 | 1000 | (67.8) | 99.2 | ||||||
| 375 | 372 | 39.1 | 69.5 | (112.1) | 53.2 | 128.9 | 1010 | (68.1) | 99.5 | ||||||
| 380 | 376 | 39.5 | 69.7 | 53.8 | 130.9 | 1020 | (68.3) | ||||||||
| 385 | 380 | 40.0 | 69.9 | 54.4 | 132.7 | 1030 | (68.5) | ||||||||
| 390 | 385 | 40.4 | 70.2 | 55.0 | 134.6 | 1040 | (68.8) | ||||||||
| 395 | 388 | 40.8 | 70.4 | 55.6 | 136.5 | 1050 | (69.0) | ||||||||
| 400 | 392 | 41.3 | 70.6 | 56.2 | 138.4 | 1060 | (69.2) | ||||||||
| 405 | 396 | 41.7 | 70.8 | 56.8 | 140.4 | 1070 | (69.5) | ||||||||
| 410 | 400 | 42.1 | 71.0 | 57.4 | 142.3 | 1080 | (69.7) | ||||||||
| 415 | 404 | 42.5 | 71.3 | 57.9 | 144.2 | 1090 | (69.9) | ||||||||
| 420 | 408 | 42.9 | 71.5 | 58.5 | 146.1 | 1100 | (70.1) | ||||||||
| 425 | 412 | 43.3 | 71.7 | 59.1 | 148.0 | ||||||||||
| 430 | 415 | 43.7 | 71.9 | 59.6 | 150.0 | ||||||||||
| 435 | 419 | 44.1 | 72.1 | 60.2 |