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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

Zero Products, Inc.

219 Baywood
Houston, TX 77011
Toll Free: 800-991-1280
Fax: 713-675-6066
Local: 713.675.0123

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