Vicker’s
Hardness
(HV)

Brinell hardness
10 mm ball, 3,000 kgf load(HB)

Rockwell hardness (HR)

Shore
Hardness
(HS)

Tensile strength
(Approximate)

Standard
ball

Hultgren
ball

Tungsten-
Carbide
ball

A scale,
60 kgf
load brale
penetrator

B scale
100 kgf
load1/16
Inch ball

c scale,
150 kgf
load brale
penetration

D scale
100 kgf
load brale
penetrator

Austenotic
Stainless
Steel
N / mm²

Chromium
stainless
steel
N / mm²

600
590
580
570
560
550
540
530
520
510
500
490
480
470
460
450
440
430
420
410
400
390
380
370
360
350
340
330
320
310
300
295
290
285
280
275
270
265
260
255
250
245
240
230
220
210
200
190
180
170
160
150

-
-
-
-
-
505
496
488
480
473
465
456
448
441
433
425
415
405
397
388
379
369
360
350
341
331
322
313
303
294
284
280
275
270
265
261
256
252
247
243
238
233
228
219
209
200
190
181
171
162
152
143

550
542
535
527
519
512
503
495
487
479
471
460
452
442
433
425
415
405
397
388
379
369
360
350
341
331
322
313
303
294
284
280
275
270
265
261
256
252
247
243
238
233
228
219
209
200
190
181
171
162
152
143

564
554
545
535
525
517
507
497
488
479
471
460
452
442
433
425
415
405
397
388
379
369
360
350
341
331
322
313
303
294
284
280
275
270
265
261
256
252
247
243
238
233
228
219
209
200
190
181
171
162
152
143

78.6
78.4
78.0
77.8
77.4
77.0
76.7
76.4
76.1
75.7
75.3
74.9
74.5
74.1
73.6
73.3
72.8
72.3
71.8
71.4
70.8
70.3
69.8
69.2
68.7
68.1
67.6
67.0
66.4
65.8
65.2
64.8
64.5
64.2
63.8
63.5
63.1
62.7
62.4
62.0
61.6
61.2
60.7
-
-
-
-
-
-
-
-
-

-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
(110.0)

(109.0)

(108.0)

(107.0)

(105.5)

(104.5)

(103.5)

(102.0)

(101.0)

99.5

98.1
96.7
95.0
93.4
91.5
89.5
87.1
85.0
81.7
78.7

55.2
54.7
54.1
53.6
53.0
52.3
51.7
51.1
50.5
49.8
49.1
48.4
47.7
46.9
46.1
45.3
44.5
43.6
42.7
41.8
40.8
39.8
38.8
37.7
36.6
35.5
34.4
33.3
32.2
31.0
29.8
29.2
28.5
27.8
27.1
26.4
25.6
24.8
24.0
23.1
22.2
21.3
20.3
(18.0)
(15.7)
(13.4)
(11.0)
(8.5)
(6.0)
(3.0)
(0.0)
-

67.0
66.7
66.2
65.8
65.4
64.8
64.4
63.9
63.5
62.9
62.2
61.6
61.3
60.7
60.1
59.4
58.8
58.2
57.5
56.8
56.0
55.2
54.4
53.6
52.8
51.9
51.1
50.2
49.4
48.4
47.5
47.1
46.5
46.0
45.3
44.9
44.3
43.7
43.1
42.2
41.7
41.1
40.3
-
-
-
-
-
-
-
-
-

74

72

71

69

67

66

64

62

59

57

55

52

50

47

45

42

41

40

38

37

36

34
33
32
30
29
28
26
25
24
22

2400

2314

2226

2138

2050

1961

1850

1746

1638

1530

1422

1334

1245

1157

1069

981

951

922

892

863

834

785

735

667

608

549
490

-

-

-

-

-

-

-

-

-

-

1314

1245

1177

1108

1040

-

941

-

863

-

794

765

696

637

579

520
490