Hardness conversion table

Vickers
Hardness
HV
Rockwell Hardness
Tensile
Strength
N/mm²
(kgf/mm² )
 
Vickers
Hardness
HV
Rockwell Hardness
Tensile
Strength
N/mm²
(kgf/mm² )
 
Vickers
Hardness
HV
Rockwell Hardness
Tensile
Strength
N/mm²
(kgf/mm² )
B Scale
HRB
C Scale
HRC
B Scale
HRB
C Scale
HRC
B Scale
HRB
C Scale
HRC
940
-
68.0
-
540
-
51.7
1860 (190)
280
(103.5)
27.1
890 (91)
920
-
67.5
-
530
-
51.1
1825 (186)
275
-
26.4
875 (89)
900
-
67.0
-
520
-
50.5
1795 (183)
270
(102.0)
25.6
855 (87)
880
-
66.4
-
510
-
49.8
1750 (179)
265
-
24.8
840 (86)
860
-
65.9
-
500
-
49.1
1705 (174)
260
(101.0)
24.0
825 (84)
840
-
65.3
-
490
-
48.4
1660 (169)
255
-
23.1
805 (82)
820
-
64.7
-
480
-
47.7
1620 (165)
250
99.5
22.2
795 (81)
800
-
64.0
-
470
-
46.9
1570 (160)
245
-
21.3
780 (79)
780
-
63.3
-
460
-
46.1
1530 (156)
240
98.1
20.3
765 (78)
760
-
62.5
-
450
-
45.3
1495 (153)
230
96.7
(18.0)
730 (75)
740
-
61.8
-
440
-
44.5
1460 (149)
220
95.0
(15.7)
695 (71)
720
-
61.0
-
430
-
43.6
1410 (144)
210
93.4
(13.4)
670 (68)
700
-
60.1
-
420
-
42.7
1370 (140)
200
91.5
(11.0)
635 (65)
690
-
59.7
-
410
-
41.8
1330 (136)
190
89.5
(8.5)
605 (62)
680
-
59.2
-
400
-
40.8
1290 (131)
180
87.1
(6.0)
580 (59)
670
-
58.8
-
390
-
39.8
1240 (127)
170
85.0
(3.0)
545 (56)
660
-
58.3
-
380
(110.0)
38.8
1205 (123)
160
81.7
(0.0)
510 (53)
650
-
57.8
-
370
-
37.7
1170 (120)
150
78.7
-
490 (50)
640
-
57.3
-
360
(109.0)
36.6
1130 (115)
140
75.0
-
455 (46)
630
-
56.8
-
350
-
35.5
1095 (112)
130
71.2
-
425 (44)
620
-
56.3
-
340
(108.0)
34.4
1070 (109)
120
66.7
-
390 (40)
610
-
55.7
-
330
-
33.3
1035 (105)
110
62.3
-
-
600
-
55.2
-
320
(107.0)
32.2
1005 (103)
100
56.2
-
-
590
-
54.7
2055 (210)
310
-
31.0
980 (100)
95
52.0
-
-
580
-
54.1
2020 (206)
300
(105.5)
29.8
950 (97)
90
48.0
-
-
570
-
53.6
1985 (202)
295
-
29.2
935 (96)
85
41.0
-
-
560
 
53.0
1950 (199)
290
(104.5)
28.5
915 (94)
       
550
 
52.3
1905 (194)
285
-
27.8
905 (92)
       

 

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