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Brinell - Rockwell Hardness Conversion
Brinell Number
Rockwell "C"
682
62
653
60
601
58
578
56
534
54
514
52
477
50
461
48
429
46
415
44
388
42
375
40
352
38
331
36
321
34
302
32
285
30
269
28
248
24
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