Hardness Converter Table 1
APPROXIMATIVE CONVERSION BETWEEN THE NUMBERS OF HARDNESS ROCKWELL, SUPERFICIAL ROCKWELL, VICKERS AND BRINELL.
C | A | D | 15N | 30N | 45N | Vickers | Brinell | G | |
Diamond cone | Diamond cone | Diamond cone | Diamond cone | Diamond cone | Diamond cone | Diamond pyramid | Ball 10mm | Ball 1/16" | Max. Stress |
150 kg | 60 kg | 100 kg | 15 kg | 30 kg | 45 kg | 10 kg | 3000 kg | 150 kg | kg./mm2 |
80 | 92.0 | 86.5 | 96.5 | 92.0 | 87.0 | 1865 | - | - | |
79 | 91.5 | 85.5 | - | 91.5 | 86.5 | 1787 | - | - | |
78 | 91.0 | 84.5 | 96.0 | 91.0 | 85.5 | 1710 | - | - | |
77 | 90.5 | 84.0 | - | 90.5 | 84.5 | 1633 | - | - | |
76 | 90.0 | 83.0 | 95.5 | 90.0 | 83.5 | 1556 | - | - | |
75 | 89.5 | 82.5 | - | 89.0 | 82.5 | 1478 | - | - | |
74 | 89.0 | 81.5 | 95.0 | 88.5 | 81.5 | 1400 | - | - | |
73 | 88.5 | 81.0 | - | 88.0 | 80.5 | 1323 | - | - | |
72 | 88.0 | 80.0 | 94.5 | 87.0 | 79.5 | 1245 | - | - | Approximative |
71 | 87.0 | 79.5 | - | 86.5 | 78.5 | 1160 | - | - | values only |
70 | 86.5 | 78.5 | 94.0 | 86.0 | 77.5 | 1076 | - | - | for steel |
69 | 86.0 | 78.0 | 93.5 | 85.0 | 76.5 | 1004 | - | - | |
68 | 85.5 | 77.0 | - | 84.5 | 75.5 | 942 | - | - | |
67 | 85.0 | 76.0 | 93.0 | 83.5 | 74.5 | 894 | |||
66 | 84.5 | 75.5 | 92.5 | 83.0 | 73.0 | 854 | - | - | |
65 | 84.0 | 74.5 | 92.0 | 82.0 | 72.0 | 820 | - | - | |
64 | 83.5 | 74.0 | - | 81.0 | 71.0 | 789 | - | - | |
63 | 83.0 | 73.0 | 91.5 | 80.0 | 70.0 | 763 | - | - | |
62 | 82.5 | 72.5 | 91.0 | 79.0 | 69.0 | 739 | - | - | |
61 | 81.5 | 71.5 | 90.5 | 78.5 | 67.5 | 716 | - | - | |
60 | 81.0 | 71.0 | 90.0 | 77.5 | 66.5 | 695 | 614 | - | 221 |
59 | 80.5 | 70.0 | 89.5 | 76.5 | 65.5 | 675 | 600 | - | 215 |
58 | 80.0 | 69.0 | - | 75.5 | 64.0 | 655 | 587 | - | 210 |
57 | 79.5 | 68.5 | 89.0 | 75.0 | 63.0 | 636 | 573 | - | 205 |
56 | 79.0 | 67.5 | 88.5 | 74.0 | 62.0 | 617 | 560 | - | 200 |
55 | 78.5 | 67.0 | 88.0 | 73.0 | 61.0 | 598 | 547 | - | 195 |
54 | 78.0 | 66.0 | 87.5 | 72.0 | 59.5 | 580 | 534 | - | 190 |
53 | 77.5 | 65.5 | 87.0 | 71.0 | 58.5 | 562 | 522 | - | 185 |
52 | 77.0 | 64.5 | 86.5 | 70.5 | 57.5 | 545 | 509 | - | 180 |
51 | 76.5 | 64.0 | 86.0 | 69.5 | 56.0 | 528 | 496 | - | 176 |
50 | 76.0 | 63.0 | 85.5 | 68.5 | 55.0 | 513 | 484 | - | 171 |
49 | 75.5 | 62.0 | 85.0 | 67.5 | 54.0 | 498 | 472 | - | 166 |
48 | 74.5 | 61.5 | 84.5 | 66.5 | 52.5 | 485 | 460 | - | 162 |
47 | 74.0 | 60.5 | 84.0 | 66.0 | 51.5 | 471 | 448 | - | 157 |
46 | 73.5 | 60.0 | 83.5 | 65.0 | 50.0 | 458 | 437 | - | 153 |
45 | 73.0 | 59.0 | 83.0 | 64.0 | 49.0 | 446 | 426 | - | 148 |
44 | 72.5 | 58.5 | 82.5 | 63.0 | 48.0 | 435 | 415 | - | 144 |
43 | 72.0 | 57.5 | 82.0 | 62.0 | 46.5 | 424 | 404 | - | 140 |
42 | 71.5 | 57.0 | 81.5 | 61.5 | 45.5 | 413 | 393 | - | 136 |
41 | 71.0 | 56.0 | 81.0 | 60.5 | 44.5 | 403 | 382 | - | 132 |
40 | 70.5 | 55.5 | 80.5 | 59.5 | 43.0 | 393 | 372 | - | 128 |
39 | 70.0 | 54.5 | 80.0 | 58.5 | 42.0 | 383 | 362 | - | 124 |
38 | 69.5 | 54.0 | 79.5 | 57.5 | 41.0 | 373 | 352 | - | 120 |
37 | 69.0 | 53.0 | 79.0 | 56.5 | 39.5 | 363 | 342 | - | 117 |
36 | 68.5 | 52.5 | 78.5 | 56.0 | 38.5 | 353 | 332 | - | 114 |
35 | 68.0 | 51.5 | 78.0 | 55.0 | 37.0 | 343 | 322 | - | 110 |
34 | 76.5 | 50.5 | 77.0 | 54.0 | 36.0 | 334 | 313 | - | 108 |
33 | 67.0 | 50.0 | 76.5 | 53.0 | 35.0 | 325 | 305 | - | 104 |
32 | 66.5 | 49.0 | 76.0 | 52.0 | 33.5 | 317 | 297 | - | 101 |
31 | 66.0 | 48.5 | 75.5 | 51.5 | 32.5 | 309 | 290 | - | 98 |
30 | 65.5 | 47.5 | 75.0 | 50.5 | 31.5 | 301 | 283 | 92.0 | 96 |
29 | 65.0 | 47.0 | 74.5 | 49.5 | 30.0 | 293 | 276 | 91.0 | 93 |
28 | 64.5 | 46.0 | 74.0 | 48.5 | 29.0 | 285 | 270 | 90.0 | 91 |
27 | 64.0 | 45.5 | 73.5 | 47.5 | 28.0 | 278 | 265 | 89.0 | 89 |
26 | 63.5 | 44.5 | 72.5 | 47.0 | 26.5 | 271 | 260 | 88.0 | 86 |
25 | 63.0 | 44.0 | 72.0 | 46.0 | 25.5 | 264 | 255 | 87.0 | 84 |
24 | 62.5 | 43.0 | 71.5 | 45.0 | 24.0 | 257 | 250 | 86.0 | 82 |
23 | 62.0 | 42.5 | 71.0 | 44.0 | 23.0 | 251 | 245 | 84.5 | 81 |
22 | 61.5 | 41.5 | 70.5 | 43.0 | 22.0 | 246 | 240 | 83.5 | 79 |
21 | 61.0 | 41.0 | 70.0 | 42.5 | 20.5 | 241 | 235 | 82.5 | 77 |
20 | 60.5 | 40.0 | 69.5 | 41.5 | 19.5 | 236 | 230 | 81.0 | 76 |