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Brinell hardness (HB), Rockwell hardness (HRC) and Vickers hardness (VH)

What is Brinell hardness (HB)? What is Rockwell hardness (HRC)? What is Vickers hardness (VH)? How to convert from HRC and VH to HB?

The Brinell hardness will scale the hardness of materials by the penetration depth of an indenter, which means we need to punch a small pit on the surface of the metal castings.

The Rockwell hardness determines the hardness by measuring the depth of penetration of an indenter under a large load compared to the penetration made by a preload.

The Vickers hardness has the same basic principle as with all common measures of hardness, is to observe the questioned material's ability to resist plastic deformation from a standard source.

According to our experience, as for the iron and steel castings, the Brinell hardness is more common in China. Almost all the foundries have HB testers in China. Some foundries have the Rockwell hardness testers, but very seldom metal foundries will use the VH testers.

The following is the conversion table for HB, HRC and VH. We hope this comparison table can help you to convert between them.

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Tensile Strength Rm
N/ mm
Vickers hardness
HV
Brinell hardness
HB
Rockwell hardness
HRC
250 80 76.0 -
270 85 80.7 -
285 90 85.2 -
305 95 90.2 -
320 100 95.0 -
335 105 99.8 -
350 110 105 -
370 115 109 -
380 120 114 -
400 125 119 -
415 130 124 -
430 135 128 -
450 140 133 -
465 145 138 -
480 150 143 -
490 155 147 -
510 160 152 -
530 165 156 -
545 170 162 -
560 175 166 -
575 180 171 -
595 185 176 -
610 190 181 -
625 195 185 -
640 200 190 -
660 205 195 -
675 210 199 -
690 215 204 -
705 220 209 -
720 225 214 -
740 230 219 -
755 235 223 -
770 240 228 20.3
785 245 233 21.3
800 250 238 22.2
820 255 242 23.1
835 260 247 24.0
850 265 252 24.8
865 270 257 25.6
880 275 261 26.4
900 280 266 27.1
915 285 271 27.8
930 290 276 28.5
950 295 280 29.2
965 300 285 29.8
995 310 295 31.0
1030 320 304 32.2
1060 330 314 33.3
1095 340 323 34.4
1125 350 333 35.5
1115 360 342 36.6
1190 370 352 37.7
1220 380 361 38.8
1255 390 371 39.8
1290 400 380 40.8
1320 410 390 41.8
1350 420 399 42.7
1385 430 409 43.6
1420 440 418 44.5
1455 450 428 45.3
1485 460 437 46.1
1520 470 447 46.9
1555 480 (456) 47.7
1595 490 (466) 48.4
1630 500 (475) 49.1
1665 510 (485) 49.8
1700 520 (494) 50.5
1740 530 (504) 51.1
1775 540 (513) 51.7
1810 550 (523) 52.3
1845 560 (532) 53.0
1880 570 (542) 53.6
1920 580 (551) 54.1
1955 590 (561) 54.7
1995 600 (570) 55.2
2030 610 (580) 55.7
2070 620 (589) 56.3
2105 630 (599) 56.8
2145 640 (608) 57.3
2180 650 (618) 57.8
- 660 - 58.3
- 670 - 58.8
- 680 - 59.2
- 690 - 59.7
- 700 - 60.1
- 720 - 61.0
- 740 - 61.8
- 760 - 62.5
  780   63.3
- 800 - 64.0
- 820 - 64.7
- 840 - 65.3
- 860 - 65.9
- 880 - 66.4
- 900 - 67.0
- 920 - 67.5
- 940 - 68.0

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