Hardness comparison

Standard hardness conversion table

A variety of hardness-testing methods are available, including the Vickers, Brinell, Rockwell, Meyer and Leeb tests. Although it is impossible in many cases to give an exact conversion, it is possible to give an approximate material-specific comparison table for steels.

## Hardness comparison table

[edit]

Brinell HB
(10 mm Ball, 3000 kg load) | Vickers HV
(5 kg) | Rockwell C HRC
(120 degree cone 150 kg) | Rockwell B HRB
(1/16" ball 100 kg) | Leeb HLD[1]

|
|
|
|

800 | - | 72 | - | 856
780 | 1220 | 71 | - | 850
760 | 1210 | 70 | - | 843
745 | 1114 | 68 | - | 837
725 | 1060 | 67 | - | 829
712 | 1021 | 66 | - | 824
682 | 940 | 65 | - | 812
668 | 905 | 64 | - | 806
652 | 867 | 63 | - | 799
626 | 803 | 62 | - | 787
614 | 775 | 61 | - | 782
601 | 746 | 60 | - | 776
590 | 727 | 59 | - | 770
576 | 694 | 57 | - | 763
552 | 649 | 56 | - | 751
545 | 639 | 55 | - | 748
529 | 606 | 54 | - | 739
514 | 587 | 53 | 120 | 731
502 | 565 | 52 | 119 | 724
495 | 551 | 51 | 119 | 719
477 | 534 | 49 | 118 | 709
461 | 502 | 48 | 117 | 699
451 | 489 | 47 | 117 | 693
444 | 474 | 46 | 116 | 688
427 | 460 | 45 | 115 | 677
415 | 435 | 44 | 115 | 669
401 | 423 | 43 | 114 | 660
388 | 401 | 42 | 114 | 650
375 | 390 | 41 | 113 | 640
370 | 385 | 40 | 112 | 635
362 | 380 | 39 | 111 | 630
351 | 361 | 38 | 111 | 622
346 | 352 | 37 | 110 | 617
341 | 344 | 37 | 110 | 613
331 | 335 | 36 | 109 | 605
323 | 320 | 35 | 109 | 599
311 | 312 | 34 | 108 | 588
301 | 305 | 33 | 107 | 579
293 | 291 | 32 | 106 | 572
285 | 285 | 31 | 105 | 565
276 | 278 | 30 | 105 | 557
269 | 272 | 29 | 104 | 550
261 | 261 | 28 | 103 | 542
258 | 258 | 27 | 102 | 539
249 | 250 | 25 | 101 | 530
245 | 246 | 24 | 100 | 526
240 | 240 | 23 | 99 | 521
237 | 235 | 23 | 99 | 518
229 | 226 | 22 | 98 | 510
224 | 221 | 21 | 97 | 505
217 | 217 | 20 | 96 | 497
211 | 213 | 19 | 95 | 491
206 | 209 | 18 | 94 | 485
203 | 201 | 17 | 94 | 482
200 | 199 | 16 | 93 | 478
196 | 197 | 15 | 92 | 474
191 | 190 | 14 | 92 | 468
187 | 186 | 13 | 91 | 463
185 | 184 | 12 | 91 | 461
183 | 183 | 11 | 90 | 459
180 | 177 | 10 | 89 | 455
175 | 174 | 9 | 88 | 449
170 | 171 | 7 | 87 | 443
167 | 168 | 6 | 87 | 439
165 | 165 | 5 | 86 | 437
163 | 162 | 4 | 85 | 434
160 | 159 | 3 | 84 | 430
156 | 154 | 2 | 83 | 425
154 | 152 | 1 | 82 | 423
152 | 150 | - | 82 | 420
150 | 149 | - | 81 | 417
147 | 147 | - | 80 | 413
145 | 146 | - | 79 | 411
143 | 144 | - | 79 | 408
141 | 142 | - | 78 | 405
140 | 141 | - | 77 | 404
135 | 135 | - | 75 | 389
130 | 130 | - | 72 | 390
114 | 120 | - | 67 | 365
105 | 110 | - | 62 | 350
95 | 100 | - | 56 | 331
90 | 95 | - | 52 | 321
81 | 85 | - | 41 | 300
76 | 80 | - | 37 | 287

## References

[edit]

1. ^ H.Pollok, „Umwertung der Skalen“ (“Conversion of Scales”), Qualität und Zuverlässigkeit, Ausgabe 4/2008.

## Further reading

[edit]

* ISO 18265: "Metallic materials — Conversion of hardness values" (2013)
* ASTM E140-12B(2019)e1: "Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness" (2019)

## External links

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* Hardness Conversion Table – Brinell, Rockwell, Vickers – Various steels . (Archived) (archived November 11, 2011)
* Rockwell to Brinell conversion chart (Brinell, Rockwell A, B, C)
* Struers hardness conversion table (Vickers, Brinell, Rockwell B, C, D)