Correlation strength -HB

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Tensile strength-hardness conversion table
Tensile strenght Hardness
Mpa HB HRV HRB HRC HR30N
265 76 80      
270 80.7 85 41.0 41.0 41.0
285 85.5 90 48.0 - -
305 90.2 95 52.0 - -
320 95 100 56.2 - -
335 98.8 105 - - -
350 105 110 62.3 - -
370 109 115 - - -
385 114 120 66.7 - -
400 119 125 - - -
415 124 130 71.2 - -
430 128 135 - - -
450 133 140 75.0 - -
465 138 145 - - -
480 143 150 78.7 - -
495 147 155 - - -
510 152 160 81.7 - -
530 156 165 - - -
545 162 170 85.0 - -
560 166 175 - - -
575 171 180 87.1 - -
595 176 185 - - -
610 181 190 89.5 - -
625 185 195 - - -
640 190 200 91.5 - -
660 195 205 92.5 - -
675 199 210 93.5 - -
690 204 215 94.0 - -
705 209 220 95.0 - -
720 214 225 96.0 - -
740 219 230 96.7 - -
755 223 235 - - -
770 228 240 98.1 20.3 41.7
785 233 245 - 21.3 42.5
800 238 250 99.5 22.2 43.4
820 242 255 - 23.1 44.2
835 247 260 (101) 24.0 45.0
850 252 265 - 24.8 45.7
865 257 270 (102) 25.6 46.4
880 261 275 - 26.4 47.2
900 266 280 (104) 27.1 47.8
915 271 285 - 27.8 448.4
930 276 290 (105) 28.5 49.0
950 280 295 - 29.2 49.7
965 285 300 - 29.8 50.2
995 295 310 - 31.0 51.3
1030 304 320 - 32.2 52.3
1060 314 330 - 33.3 53.6
1095 323 340 - 34.4 54.4
1125 333 350 - 35.5 55.4
1156 342 360 - 36.6 56.4
1190 352 370 - 37.7 57.4
1220 361 380 - 38.8 58.4
1255 371 390 - 39.8 59.3
1290 380 400 - 40.8 60.2
1320 390 410 - 41.8 61.1
1350 399 420 - 42.7 61.9
1385 409 430 - 43.6 62.7
1420 418 440 - 44.5 63.5
1455 428 450 - 45.3 64.3
1485 437 460 - 46.1 64.9
1520 447 470 - 46.9 65.0
1555 (456) 480 - 48.4 67.1
1630 (475) 500 - 49.1 67.7
1665 (485) 510 - 49.8 68.3
1700 (494) 520 - 50.5 69.0
1740 (504) 530 - 51.1 69.5
1775 (513) 540 - 51.7 70.0
1810 (523) 550 - 52.3 70.5
1845 (532) 560 - 5.0 71.2
1880 (542) 570 - 53.6 71.7
1920 (551) 580 - 54.1 72.1
1955 (561) 590 - 54.7 72.7
1995 (570) 600 - 55.2 73.2
2030 (580) 610 - 55.7 73.7
2070 (589) 620 - 56.3 74.2
2105 (599) 630 - 56.8 74.6
2145 (608) 640 - 57.3 75.1
2180 (618) 650 - 57.8 75.5
- - 660 - 58.3 75.9
- - 670 - 58.8 7604.0
- - 680 - 59.2 76.8
- - 690 - 59.7 77.2
- - 700 - 60.1 77.6
- - 720 - 61.0 78.4
- - 740 - 61.8 79.1
- - 760 - 62.5 79.7
- - 780 - 63.3 80.4
- - 800 - 64.0 81.1
- - 820 - 64.7 81.7
- - 840 - 65.3 82.2
- - 860 - 65.9 82.7
- - 880 - 66.4 83.1
- - 900 - 67.0 83.6
- - 920 - 67.5 84.0
- - 940 - 68.0 84.4