Approximate Hardness Conversion

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BrinellRockwell CRockwell ARockwell BVickersKnop
Hardness150 kg.60 kg100 kgHardness500 g
Number120° cone120° cone1/16" ballNumberHardness
Number
-7086.5--
-6986---
-6885.5---
-6785---
76766.584.7---
74565.584.2-840852
7126483.5-783808
68261.582-737768
6536081-697732
62758.580.2-667703
60157.579.2-640677
5785679-615652
55554.578.2-591626
53453.577.7-569604
5145277-547579
4955176.5-528558
47749.575.7-508537
46148.574.7-491518
4444774.2-472496
42945.573.2-455476
41544.572.7-440459
4014372-425441
3884271.5-410423
37540.570.7-395407
3633970-383392
3523869.5110372379
34136.568.7109360367
33135.568.2108.5350356
32134.567.7108339345
3113367107.5328336
3023266.5107319327
2933166106309318
2853065.5105.5301310
2772965104.5292302
26927.564.2104284294
26226.563.7103276286
25525.563.2102269279
2482462.5101261272
2412361.8100253265
23521.56199247259
22920.56098241253
2231959.597234247
21717.559.296.5228242
2121658.595.5222237
2071557.794.5218232
19712.55793207222
1871055.790.5196212
17985589188202
170553.587178194

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