Hardness Conversion Chart - Tokushu Kinzoku Excel Page 2
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2<<Hardness conversion table>>
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Tensile strength
Rockwell Superficial [HR]
Vickers
Brinell
Rockwell C Rockwell B
Shore
approximate value
2
[HV]
[HB]
[HRC]
[HRB]
15N
30N
45N
15T
30T
45T
[HS]
[N/mm
] [MPa]
410
388
41.8
81.4
61.1
45.3
1,330
400
379
40.8
81.0
60.2
44.1
55
1,290
390
369
39.8
80.3
59.3
42.9
1,250
380
360
38.8
(110.0)
79.8
58.4
41.7
52
1,210
370
350
37.7
79.2
57.4
40.4
1,170
360
341
36.6
(109.0)
78.5
56.4
39.1
50
1,130
350
331
35.5
78.0
55.4
37.8
1,100
340
322
34.4
(108.0)
77.4
54.4
36.5
47
1,070
330
313
33.3
76.8
53.6
35.2
1,030
320
303
32.2
(107.0)
76.2
52.3
33.9
45
1,010
310
294
31.0
75.6
51.3
32.5
980
300
284
29.8
(105.5)
74.9
50.2
31.1
42
950
295
280
29.2
74.6
49.7
30.4
940
290
275
28.5
(104.5)
74.2
49.0
29.5
41
920
285
270
27.8
73.8
48.4
28.7
900
280
265
27.1
(103.5)
73.4
47.6
27.9
40
890
275
261
26.4
73.0
47.2
27.1
870
270
256
25.6
(102.0)
72.6
46.4
26.2
38
850
265
252
24.8
72.1
45.7
25.2
840
260
247
24.0
(101.0)
71.6
45.0
24.3
37
820
255
243
23.1
71.1
44.2
23.2
800
250
238
22.2
99.5
70.6
43.4
22.2
36
790
245
233
21.3
70.1
42.5
21.1
780
240
228
20.3
98.1
69.6
41.7
19.9
93.1
83.1
72.9
34
770
230
219
(18.0)
96.7
92.6
82.0
74.2
33
740
220
209
(15.7)
95.0
92.0
80.9
69.6
32
700
210
200
(13.4)
93.4
91.5
79.8
67.9
30
670
200
190
(11.0)
91.5
90.8
78.4
65.9
29
640
190
181
(8.5)
89.5
90.2
77.1
63.8
28
610
180
171
(6.0)
87.1
89.5
75.8
61.8
26
580
170
162
(3.0)
85.0
88.7
74.0
59.1
25
550
160
152
(0.0)
81.7
87.7
72.0
56.1
24
520
150
143
78.7
86.6
69.7
52.8
22
490
140
133
75.0
85.5
67.4
49.3
21
450
130
124
71.2
84.0
64.4
44.8
20
430
120
114
66.7
82.6
61.4
40.3
390
110
105
62.3
80.8
57.7
34.7
100
95
56.2
78.5
53.0
27.7
95
90
52.0
90
86
48.0
85
81
41.0
[Notes]
・These values are taken from the SAE and ASTM conversion tables.
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