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Comparative Hardness Scales
 
 
 
Vickers VHN Brinell BHN Rockwell
HRB HRC
80
85
90
95
100
76.0
80.7
85.5
90.2
95.0

41.0
48.0
52.0
56.2
 
105
110
115
120
125
99.8
105
109
114
119

62.3

66.7
 
130
135
140
145
150
124
128
133
138
143
71.2

75.0

78.7
 
155
160
165
170
175
147
152
156
162
166

81.7

85.0
 
180
185
190
195
200
171
176
181
185
190
87.1

89.5

91.5
 
205
210
215
220
225
195
199
204
209
214
92.5
93.5
94.0
95.0
96.0
 
230
235
240
245
250
219
223
228
233
238
96.7

98.1

99.5


20.3
21.3
22.2
255
260
265
270
275
242
247
252
257
261

(101)

(102)
23.1
24.0
24.8
25.6
26.4
280
285
290
295
300
266
271
276
280
285
(104)

(105)
27.1
27.8
28.5
29.2
29.8
310
320
330
340
350
295
304
314
323
333
  31.0
32.2
33.3
34.4
35.5
Vickers VHN Brinell BHN HRC
360
370
380
390
400
342
352
361
371
380
36.6
37.7
38.8
39.9
40.8
410
420
430
440
450
390
399
409
418
428
41.8
42.7
43.6
44.5
45.3
460
470
480
490
500
437
447
(456)
(466)
(475)
46.1
46.9
47.7
48.4
49.1
510
520
530
540
550
(485)
(494)
(504)
(513)
(523)
49.8
50.5
51.1
51.7
52.3
560
570
580
590
600
(532)
(542)
(551)
(561)
(570)
53.0
53.6
54.1
54.7
55.2
610
620
630
640
650
(580)
(589)
(599)
(608)
(618)
55.7
56.3
56.8
57.3
57.8
660
670
680
690
700
  58.3
58.8
59.2
59.7
60.1
720
740
760
780
800


62.5
63.3
61.0
61.8


64.0
820
840
860
880
900
  64.7
65.3
65.9
66.4
67.0
920


940
  67.5


68.0
 
 
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