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Reference Tables -- Hardness Conversion Table - Brinell, Rockwell

Applies for plain carbon and low-alloy steels and cast steel and to a limited extent for high-alloy and/or work hardened steel.

Hardness Conversion Table
Tensile
Strength
(N/mm2)
Brinell Hardness
(BHN)

Vickers Hardness
(HV)

Rockwell
Hardness
(HRB)

Rockwell Hardness
(HRC)

285

86 90    
320 95 100 56.2
350 105 110 62.3  
385 114 120 66.7
415 124 130 71.2  
450 133 140 75.0
480 143 150 78.7  
510 152 160 81.7
545 162 170 85.0  
575 171 180 87.1
610 181 190 89.5  
640 190 200 91.5
675 199 210 93.5  
705 209 220 95.0
740 219 230 96.7  
770 228 240 98.1  
800 238 250 99.5  
820 242 255   23.1
850 252 265   24.8
880 261 275   26.4
900 266 280   27.1
930 276 290   28.5
950 280 295   29.2
995 295 310   31.0
1030 304 320   32.2
1060 314 330   33.3
1095 323 340   34.4
1125 333 350   35.5
1155 342 360   36.6
1190 352 370   37.7
1220 361 380   38.8
1255 371 390   39.8
1290 380 400   40.8
1320 390 410   41.8
1350 399 420   42.7
1385 409 430   43.6
1420 418 440   44.5
1455 428 450   45.3
1485 437 460   46.1
1520 447 470   46.9
1555 456 480   47.7
1595 466 490   48.4
1630 475 500   49.1
1665 485 510   49.8
1700 494 520   50.5
1740 504 530   51.1
1775 513 540   51.7
1810 523 550   52.3
1845 532 560   53.0
1880 542 570   53.6
1920 551 580   54.1
1955 561 590   54.7
1995 570 600   55.2
2030 580 610   55.7
2070 589 620   56.3
2105 599 630   56.8
2145 608 640   57.3
2180 618 650   57.8

 

 

 

 

 

 

 

 


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