HRB ↔ HRC converter
Input scale
Equivalent values
—
Range: 41 – 99.5
—
Range: 85 – 1865
—
Range: 81 – 745
—
Available: HRC 20.3 – 59.2
Why few values have both HRB and HRC
The scales cover different ranges. HRB measures low to medium hardness and HRC hardened steels; in this table they only meet around 98.1 HRB ≈ 20.3 HRC and 99.5 HRB ≈ 22.2 HRC. Outside that band, compare using Vickers or Brinell.
The scale guide and model limits are on the full hardness converter.
Equivalence table
| HRB | HRC | HV | HB |
|---|---|---|---|
| 41.0 | — | 85 | 81 |
| 48.0 | — | 90 | 86 |
| 52.0 | — | 95 | 90 |
| 56.2 | — | 100 | 95 |
| 62.3 | — | 110 | 105 |
| 66.7 | — | 120 | 114 |
| 71.2 | — | 130 | 124 |
| 75.0 | — | 140 | 133 |
| 78.7 | — | 150 | 143 |
| 81.7 | — | 160 | 152 |
| 85.0 | — | 170 | 162 |
| 87.1 | — | 180 | 171 |
| 89.5 | — | 190 | 181 |
| 91.5 | — | 200 | 190 |
| 93.4 | — | 210 | 200 |
| 95.0 | — | 220 | 209 |
| 96.7 | — | 230 | 219 |
| 98.1 | 20.3 | 240 | 228 |
| — | 21.3 | 245 | 233 |
| 99.5 | 22.2 | 250 | 238 |
| — | 23.1 | 255 | 243 |
| — | 24.0 | 260 | 247 |
| — | 24.8 | 265 | 252 |
| — | 25.6 | 270 | 256 |
| — | 26.4 | 275 | 261 |
| — | 27.1 | 280 | 265 |
| — | 27.8 | 285 | 270 |
| — | 28.5 | 290 | 275 |
| — | 29.2 | 295 | 280 |
| — | 29.8 | 300 | 284 |
| — | 31.0 | 310 | 294 |
| — | 32.2 | 320 | 303 |
| — | 33.3 | 330 | 313 |
| — | 34.4 | 340 | 322 |
| — | 35.5 | 350 | 331 |
| — | 36.6 | 360 | 341 |
| — | 37.7 | 370 | 350 |
| — | 38.8 | 380 | 360 |
| — | 39.8 | 390 | 369 |
| — | 40.8 | 400 | 379 |
| — | 41.8 | 410 | 388 |
| — | 42.7 | 420 | 397 |
| — | 43.6 | 430 | 405 |
| — | 44.5 | 440 | 415 |
| — | 45.3 | 450 | 425 |
| — | 46.1 | 460 | 433 |
| — | 46.9 | 470 | 441 |
| — | 47.7 | 480 | 452 |
| — | 48.4 | 490 | 460 |
| — | 49.1 | 500 | 471 |
| — | 49.8 | 510 | 479 |
| — | 50.5 | 520 | 488 |
| — | 51.1 | 530 | 497 |
| — | 51.7 | 540 | 507 |
| — | 52.3 | 550 | 517 |
| — | 53.0 | 560 | 525 |
| — | 53.6 | 570 | 535 |
| — | 54.1 | 580 | 545 |
| — | 54.7 | 590 | 554 |
| — | 55.2 | 600 | 564 |
| — | 55.7 | 610 | 573 |
| — | 56.3 | 620 | 582 |
| — | 56.8 | 630 | 591 |
| — | 57.3 | 640 | 601 |
| — | 57.8 | 650 | 611 |
| — | 58.3 | 660 | 620 |
| — | 58.8 | 670 | — |
| — | 59.2 | 680 | — |
| — | 59.7 | 690 | — |
| — | 60.1 | 700 | 653 |
| — | 61.0 | 720 | — |
| — | 61.8 | 740 | — |
| — | 62.5 | 760 | 710 |
| — | 63.3 | 780 | — |
| — | 64.0 | 800 | — |
| — | 64.7 | 820 | 745 |
| — | 65.3 | 840 | — |
| — | 65.9 | 860 | — |
| — | 66.4 | 880 | — |
| — | 67.0 | 900 | — |
| — | 67.5 | 920 | — |
| — | 68.0 | 940 | — |
Correlation values for non-austenitic steels, based on ASTM E140 and the ASM Metals Handbook. They are approximate and do not replace a hardness test. HB with tungsten carbide ball from 480 HV.
Frequently Asked Questions
What is HRB hardness?
It is the Rockwell B scale, used for low to medium hardness materials such as annealed steels. The table on this page covers 41 to 99.5 HRB.
Can HRB be converted to HRC?
Only in the band where both scales overlap: in this table, around 98.1 HRB ≈ 20.3 HRC and 99.5 HRB ≈ 22.2 HRC. Outside that band, compare using Vickers or Brinell. These are approximate values for non-austenitic steels and do not replace a test.