Jan 4 2002
|
Brinell (HB)
|
Vickers (HV)
|
Rockwell C (HR C)
|
Rockwell B (HR B)
|
|
479
|
513
|
50
|
-
|
|
450
|
481
|
48
|
-
|
|
425
|
452
|
46
|
-
|
|
403
|
427
|
44
|
-
|
|
382
|
404
|
42
|
-
|
|
363
|
382
|
40
|
-
|
|
346
|
362
|
38
|
-
|
|
330
|
344
|
36
|
-
|
|
315
|
326
|
34
|
-
|
|
301
|
309
|
32
|
106
|
|
286
|
285
|
28
|
104
|
|
271
|
266
|
26
|
102
|
|
256
|
248
|
23
|
100
|
|
240
|
234
|
20
|
98
|
|
226
|
220
|
17
|
96
|
|
213
|
209
|
14
|
94
|
|
202
|
198
|
12
|
92
|
|
192
|
188
|
-
|
90
|
|
183
|
179
|
-
|
88
|
|
174
|
171
|
-
|
86
|
|
167
|
164
|
-
|
84
|
|
160
|
157
|
-
|
82
|
|
153
|
151
|
-
|
80
|
|
147
|
144
|
-
|
78
|
|
142
|
140
|
-
|
76
|
|
137
|
137
|
-
|
74
|
|
132
|
133
|
-
|
72
|
|
128
|
129
|
-
|
70
|
Conversions between hardness values are approximate, and they cannot be used to determine conformance with specifications. Actual hardness values will depend on the type of product. Cold worked products may have high hardness values close to the surface. Conversions between hardness and tensile strength are not standardized and are not reliable.