Home » Rockwell C(High) Hardness Range
Rockwell C(High) Hardness Range
C |
HV |
Mohs |
HK |
HB |
150 kgf |
Vickers |
Mohs |
Knoop |
Brinell |
diamond |
Scale |
Scale |
>500gf |
Oct-00 |
80 |
1860 |
8.64 |
|
|
79 |
1790 |
8.47 |
|
|
78 |
1710 |
8.31 |
|
|
77 |
1630 |
8.14 |
|
|
76 |
1560 |
7.97 |
|
|
75 |
1480 |
7.78 |
|
|
74 |
1400 |
7.59 |
|
|
73 |
1320 |
7.4 |
|
|
72 |
1240 |
7.21 |
|
|
71 |
1160 |
7 |
|
|
70 |
1080 |
6.76 |
|
|
69 |
1000 |
6.56 |
|
|
68 |
942 |
6.38 |
907 |
|
67 |
894 |
6.23 |
881 |
|
66 |
854 |
6.11 |
859 |
|
65 |
820 |
6.01 |
841 |
745 |
64 |
789 |
5.91 |
814 |
711 |
63 |
763 |
5.82 |
790 |
710 |
62 |
746 |
5.76 |
775 |
683 |
61 |
720 |
5.67 |
751 |
682 |
60 |
697 |
5.59 |
730 |
653 |
59 |
674 |
5.52 |
710 |
627 |
58 |
653 |
5.44 |
688 |
579 |
57 |
633 |
5.37 |
667 |
578 |
56 |
613 |
5.29 |
646 |
556 |
55 |
595 |
5.22 |
627 |
555 |
54 |
577 |
5.16 |
608 |
534 |
53 |
560 |
5.09 |
590 |
514 |
52 |
544 |
5.03 |
573 |
496 |
51 |
528 |
4.97 |
556 |
495 |
50 |
513 |
4.91 |
540 |
477 |
49 |
498 |
4.84 |
524 |
461 |
48 |
484 |
4.78 |
508 |
445 |
47 |
471 |
4.73 |
494 |
444 |
46 |
458 |
4.67 |
480 |
432 |
45 |
446 |
4.62 |
467 |
416 |
44 |
434 |
4.57 |
454 |
415 |
43 |
423 |
4.52 |
441 |
401 |
42 |
412 |
4.47 |
430 |
389 |
41 |
402 |
4.42 |
419 |
388 |
40 |
392 |
4.37 |
408 |
375 |
39 |
382 |
4.33 |
398 |
363 |
38 |
372 |
4.28 |
387 |
352 |
37 |
363 |
4.23 |
378 |
341 |
36 |
354 |
4.19 |
368 |
332 |
35 |
345 |
4.15 |
359 |
331 |
34 |
336 |
4.1 |
349 |
321 |
33 |
327 |
4.06 |
340 |
311 |
32 |
318 |
4.01 |
330 |
302 |
31 |
310 |
3.97 |
322 |
293 |
30 |
302 |
3.92 |
314 |
285 |
29 |
294 |
3.88 |
306 |
277 |
28 |
286 |
3.83 |
297 |
269 |
27 |
279 |
3.79 |
290 |
262 |
26 |
272 |
3.75 |
283 |
256 |
25 |
266 |
3.72 |
277 |
255 |
24 |
260 |
3.68 |
271 |
248 |
23 |
254 |
3.65 |
265 |
241 |
22 |
248 |
3.61 |
258 |
235 |
21 |
243 |
3.58 |
253 |
229 |
20 |
238 |
3.55 |
248 |
223 |