Approximative values and not valide for low alloy steel.

Tensile Strength (N/mm2) Hardness Vickers
(F>=98N)		 Hardness Brinell* HRC HRA
770 240 228 20.3 60.7
785 245 233 21.3 61.2
800 250 238 22.2 61.6
820 255 242 23.1 62.0
835 260 247 24.0 62.4
850 265 252 25.8 62.7
865 270 257 25.8 63.1
880 275 261 26.4 63.5
900 208 266 27.1 63.8
915 285 271 27.8 64.2
930 290 276 28.5 64.5
950 295 280 29.2 64.8
965 300 285 29.8 65.2
995 310 295 31.0 65.8
1030 320 304 32.2 66.4
1060 330 314 33.3 67.0
1095 340 323 34.4 67.6
1125 350 333 35.5 68.1
1155 360 342 36.6 68.7
1190 370 352 37.7 69.2
1220 380 361 38.8 69.8
1255 390 371 39.8 70.3
1290 400 380 40.8 70.8
1320 410 390 41.8 71.4
1350 420 399 42.7 71.8
1385 430 409 43.6 72.3
1420 440 418 44.5 72.8
1455 450 428 45.3 73.3
1485 460 437 46.1 73.6
1520 470 447 46.9 74.1
1555 480 (456) 47.7 74.5
1595 490 (466) 48.4 74.8
1630 500 (475) 49.1 75.3
1665 510 (485) 49.8 75.7
1700 520 (494) 50.5 76.1
1740 530 (504) 51.1 76.4
1775 540 (513) 51.7 76.7
1810 550 (523) 52.3 77.0
1845 560 (532) 53.0 77.4
1880 570 (542) 53.6 77.8
1920 580 (551) 54.1 78.0
1955 590 (561) 54.7 78.4
1995 600 (570) 55.2 78.6
2030 610 (580) 55.7 78.9
2070 620 (589) 56.3 79.2
2105 630 (599) 56.5 79.5
2145 640 (608) 57.3 79.8
2180 650 (618) 58.7 80.0
660 58.3 80.3
670 58.8 80.6
680 59.2 80.8
690 59.7 81.1
700 60.1 81.3
720 61.0 81.8
740 61.8 82.2
760 62.5 82.6
780 63.3 83.0
800 64.0 83.4
820 64.7 83.8
840 65.3 84.1
860 65.9 84.4
880 66.4 84.7
900 67.0 85.0
920 67.5 85.3
940 68.8 85.6