|
|
|
Hardness
Conversion Chart
|
|
|
|
| |
|
Brinell
Hardness
|
Rockwell
B-Scale
|
Rockwell
C-Scale
|
Approximate
Tensile (lbs/PSI)
|
|
653
|
-
|
62
|
324,000
|
|
627
|
-
|
60
|
311,000
|
|
601
|
-
|
59
|
306,000
|
|
578
|
-
|
57
|
290,000
|
|
578
|
-
|
57
|
290,00
|
|
555
|
-
|
56
|
284,000
|
|
534
|
-
|
54
|
270,000
|
|
514
|
-
|
53
|
263,000
|
|
495
|
-
|
51
|
250,000
|
|
477
|
-
|
50
|
243,000
|
|
461
|
-
|
49
|
236,000
|
|
444
|
-
|
47
|
223,000
|
|
429
|
-
|
47
|
217,000
|
|
415
|
-
|
45
|
211,000
|
|
401
|
-
|
42
|
194,000
|
|
388
|
-
|
41
|
188,000
|
|
375
|
-
|
40
|
182,000
|
|
363
|
-
|
38
|
171,000
|
|
352
|
-
|
37
|
166,000
|
|
331
|
-
|
36
|
162,000
|
|
321
|
-
|
34
|
153,000
|
|
311
|
-
|
33
|
148,000
|
|
302
|
-
|
32
|
144,000
|
|
293
|
-
|
31
|
140,000
|
|
285
|
-
|
30
|
136,000
|
|
277
|
-
|
29
|
132,000
|
|
269
|
-
|
28
|
129,000
|
|
262
|
-
|
27
|
126,000
|
|
255
|
-
|
25
|
120,000
|
|
248
|
-
|
24
|
117,000
|
|
241
|
100
|
23
|
115,000
|
|
235
|
99
|
22
|
112,000
|
|
229
|
98
|
21
|
110,000
|
|
223
|
97
|
20
|
108,000
|
|
|
