Hardness Conversion Chart
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1
2HARDNESS CONVERSION CHART
Sclerscope
Brinell
Tensile Strength
Hardness
Rockwell
Diamond
Number
Pyramid
Scale HV10
Dia. Imp.
“A”
Carbide
Standard
Tons/
1000lb/
kg/
Mpa
Hardnes
HV30
“C” Scales
for 10mm
Ball
Ball
inch
2
inch
2
mm
2
N/mm
2
s
Scale
Ball
Number
96
85.6
67.7
900
95
85
67
880
93
84.7
66.3
860
92
84.2
65.5
840
90
83.8
64.8
820
88
83.4
64
800
87
83
63.3
780
86
82.6
62.5
760
84
82.2
61.7
740
2.44
630
82
81.8
61
725
2.45
627
81.5
60.5
710
2.5
601
132
295
208
2039
81
81.2
60
698
2.55
578
127
284
200
1961
78
80.6
58.9
670
2.6
555
122
273
192
1884
75
79.6
57.1
630
2.66
534
117
262
184
1807
73
79
56.1
609
2.7
514
112
250
176
1729
71
78.2
54.4
572
2.75
495
495
108
241
170
1668
68
76.9
51.9
532
2.8
477
477
105
235
165
1621
66
76.3
50.7
517
2.85
461
461
101
226
160
1559
64
75.5
49.5
497
2.9
444
444
98
219
155
1513
62
74.2
47.5
470
2.95
429
429
95
212
150
1467
60
73.5
46
452
3
415
415
92
206
145
1420
58
73
44.8
437
3.05
401
401
88
197
139
1359
56
72.5
43.7
422
3.1
388
388
85
190
134
1312
54
71.5
42.4
408
3.15
375
375
82
183
129
1266
52
71
41.3
395
3.2
363
363
80
179
126
1235
51
70.3
39.9
381
3.25
352
352
77
172
121
1189
49
69.8
38.8
370
3.3
341
341
75
168
118
1158
48
69.2
37.7
359
3.35
331
331
73
163
114
1127
46
68.8
36.7
349
3.4
321
321
71
159
111
1096
45
68
35
337
3.45
311
311
68
152
107
1050
43
67.5
34
327
3.5
302
302
66
147
104
1019
42
66.8
33
318
3.55
293
293
64
143
101
988
41
66.2
32
308
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