Mitutoyo HM-200A Series - Sae Steel

9. Appendix
No. 99MBG127A
9-5
9.1.3 SAE STEEL 1 (SAE J 417 DEC8, for iron steel, HV to others hardness conversion
chart
*1
)
HV HBS HBW HS TENS2 TENS
29421N,
10mmBal
29421N,
10mmBal
HRA HRB HRC HRD HR15N HR30N HR45N (MPa)
940 85.6 68.0 76.9 93.2 84.4 75.4 97
920 85.3 67.5 76.5 93.0 84.0 74.8 96
900 85.0 67.0 76.1 92.9 83.6 74.2 95
880 (767) 84.7 66.4 75.7 92.7 83.1 73.6 93
860 (757) 34.4 65.9 75.3 92.5 82.7 73.1 92
840 (745) 34.1 65.3 74.8 92.3 82.2 72.2 91
820 (733) 83.8 64.7 74.3 92.1 81.7 71.8 90
800 (722) 83.4 64.0 73.8 91.8 81.1 71.0 88
780 (710) 83.0 63.3 73.3 91.5 80.4 70.2 87
760 (698) 82.6 62.5 72.6 91.2 79.7 69.4 86
740 (684) 82.2 61.8 72.1 91.0 79.1 68.6 84
720 (670) 81.8 61.0 71.5 90.7 78.4 67.7 83
700 (656) 81.3 60.1 70.8 90.3 77.6 66.7 81
690 (647) 81.1 59.7 70.5 90.1 77.2 66.2 ---
680 (638) 80.8 59.2 70.1 89.8 76.8 65.7 80
670 630 80.6 58.8 69.8 89.7 76.4 65.3 ---
660 620 80.3 58.3 69.4 89.5 75.9 64.7 79
650 611 80.0 57.8 69.0 89.2 75.5 64.1 ---
640 601 79.8 57.3 68.7 89.0 75.1 63.5 77
630 591 79.5 56.8 68.3 88.8 74.6 63.0 ---
620 582 79.2 56.3 67.9 88.5 74.2 62.4 75
610 573 78.9 55.7 67.5 88.2 73.6 61.7 ---
600 564 78.6 55.2 67.0 88.0 73.2 61.2 74
590 554 73.4 54.7 66.7 87.8 72.7 60.5 --- 2055 298
580 545 78.0 54.1 66.2 87.5 72.1 59.9 72 2020 293
570 535 77.8 53.6 65.8 87.2 71.7 59.3 --- 1985 288
560 525 77.4 53.0 65.4 86.9 71.2 58.6 71 1950 283
550 (505) 517 77.0 52.3 64.8 86.6 70.5 57.8 --- 1905 276
540 (496) 507 76.7 51.7 64.4 86.3 70.0 57.0 69 1860 270
530 (488) 497 76.4 51.1 63.9 86.0 69.5 56.2 --- 1825 265
520 (480) 488 76.1 50.5 63.5 85.7 69.0 55.6 67 1795 260
510 (473) 479 75.7 49.8 62.9 85.4 68.3 54.7 --- 1750 254
500 (465) 471 75.3 49.1 62.2 85.0 67.7 53.9 66 1705 247
490 (456) 460 74.9 48.4 61.6 84.7 67.1 53.1 --- 1660 241
480 448 452 74.5 47.7 61.3 84.3 66.4 52.2 64 1620 235
470 441 442 74.1 46.9 60.7 83.9 65.7 51.3 --- 1570 228
460 433 433 73.6 46.1 60.1 83.6 64.9 50.4 62 1530 222
450 425 425 73.3 45.3 59.4 83.2 64.3 49.4 --- 1495 217
440 415 415 72.8 44.5 58.8 82.8 63.5 48.4 59 1460 212
430 405 405 72.3 43.6 58.2 82.3 62.7 47.4 --- 1410 205
420 397 397 71.8 42.7 57.5 81.8 61.9 46.4 57 1370 199
410 388 388 71.4 41.8 56.8 81.4 61.1 45.3 --- 1330 193
400 379 379 70.8 40.8 56.0 81.0 60.2 44.1 55 1290 187
390 369 369 70.3 39.8 55.2 80.3 59.3 42.9 --- 1240 180
Rockwell Hardness No.
b
Rockwell Superficial