Hardness Conversion Chart - Tokushu Kinzoku Excel
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1
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]
940
68.0
93.2
84.4
75.4
97
920
67.5
93.0
84.0
74.8
96
900
67.0
92.9
83.6
74.2
95
880
66.4
92.7
83.1
73.6
93
860
65.9
92.5
82.7
73.1
92
840
65.3
92.3
82.2
72.2
91
820
64.7
92.1
81.7
71.8
90
800
64.0
91.8
81.1
71.0
88
780
63.3
91.5
80.4
70.2
87
760
62.5
91.2
79.7
69.4
86
740
61.8
91.0
79.1
68.6
84
720
61.0
90.7
78.4
67.7
83
700
60.1
90.3
77.6
66.7
81
690
59.7
90.1
77.2
66.2
680
59.2
89.8
76.8
65.7
80
670
58.8
89.7
76.4
65.3
660
58.3
89.5
75.9
64.7
79
650
57.8
89.2
75.5
64.1
640
57.3
89.0
75.1
63.5
77
630
56.8
88.8
74.6
63.0
620
56.3
88.5
74.2
62.4
75
610
55.7
88.2
73.6
61.7
600
55.2
88.0
73.2
61.2
74
590
54.7
87.8
72.7
60.5
2,060
580
54.1
87.5
72.1
59.9
72
2,020
570
53.6
87.2
71.7
59.3
1,980
560
53.0
86.9
71.2
58.6
71
1,950
550
505
52.3
86.6
70.5
57.8
1,910
540
496
51.7
86.3
70.0
57.0
69
1,860
530
488
51.1
86.0
69.5
56.2
1,820
520
480
50.5
85.7
69.0
55.6
67
1,790
510
473
49.8
85.4
68.3
54.7
1,760
500
465
49.1
85.0
67.7
53.9
66
1,710
490
456
48.4
84.7
67.1
53.1
1,660
480
448
47.7
84.3
66.4
52.2
64
1,620
470
441
46.9
83.9
65.7
51.3
1,570
460
433
46.1
83.6
64.9
50.4
62
1,530
450
425
45.3
83.2
64.3
59.4
1,500
440
415
44.5
82.8
63.5
58.4
59
1,460
430
405
43.6
82.3
62.7
57.4
1,410
420
397
42.7
81.8
61.9
46.4
57
1,370
[Notes]
・These values are taken from the SAE and ASTM conversion tables.
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