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Hardness Conversion Chart

 Steel hardness conversion table contains conversion factors for Rockwell, Vickers & Brinell. As a guide we show the theoretical conversion comparison of tonnes tensile in Newtons /mm² and MPa to steel hardness.

N/mm²
Brinell
Tons
Vickers
Rockwell
 
N/mm²
Brinell
Tons
Vickers
Rockwell
/ MPa
HB
per sq in
 
C
 
/ MPA 
HB
per sq in
 
B
.
.
.
902
65
 
770
229
50
234
99
.
.
.
836
63
 
755
223
49
228
98
.
.
.
778
61
 
739
217
48
222
97
2033
601
132
715
59
 
693
212
46
217
97
1956
578
127
671
57
 
678
207
45
212
96
1879
555
122
633
56
 
662
201
44
206
95
1802
534
117
599
54
 
647
197
43
202
94
1725
514
112
572
52
 
631
192
42
197
93
1663
495
108
547
50
 
616
187
41
192
92
1617
477
105
523
49
 
601
183
40
188
91
1535
461
101
501
48
 
585
179
39
184
90
1509
444
98
479
47
 
585
174
38
179
89
1463
429
95
459
45
 
570
170
38
175
87
1417
415
92
441
44
 
560
167
37
172
86
1355
401
88
424
42
 
554
163
36
168
85
1309
388
85
409
41
 
554
159
36
164
84
1263
375
82
395
40
 
539
156
35
161
83
1232
363
80
382
39
 
524
152
35
157
82
1186
353
77
369
37
 
508
149
34
154
81
1155
341
75
356
36
 
508
145
33
151
80
1224
331
73
344
34
 
493
143
33
148
79
1093
321
71
332
33
 
493
140
32
145
78
1047
311
68
321
32
 
477
137
32
142
78
1016
302
66
310
31
 
462
134
31
139
77
986
293
64
299
30
 
462
131
30
136
75
970
285
63
290
29
 
447
128
30
133
73
939
277
61
282
27
 
447
126
29
131
72
909
269
59
274
26
 
431
123
28
128
70
893
262
58
267
25
 
431
121
28
126
69
862
255
56
260
24
 
416
118
27
123
67
847
248
55
253
22
 
416
116
27
121
66
816
241
53
246
21
 
400
114
26
119
64
785
235
51
240
20
 
385
111
25
116
63

 

All figures quoted on this chart are theoretical and for guidance only

 



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