Hardness Conversion

Steel hardness conversion table, contains conversion factors for Rockwell, Vickers & Brinell.

As a guide we show the theoretical conversion comparison of tonnes tensile in Newtons/mm² and MPa to steel hardness.
 

N/mm² / MPa Brinell HB Tons per sq in Vickers Rockwell C
. . . 902 65
. . . 836 63
. . . 778 61
2033 601 132 715 59
1956 578 127 671 57
1879 555 122 633 56
1802 534 117 599 54
1725 514 112 572 52
1663 495 108 547 50
1617 477 105 523 49
1535 461 101 501 48
1509 444 98 479 47
1463 429 95 459 45
1417 415 92 441 44
1355 401 88 424 42
1309 388 85 409 41
1263 375 82 395 40
1232 363 80 382 39
1186 353 77 369 37
1155 341 75 356 36
1124 331 73 344 34
1093 321 71 332 33
1047 311 68 321 32
1016 302 66 310 31
986 293 64 299 30
970 285 63 290 29
939 277 61 282 27
909 269 59 274 26
893 262 58 267 25
862 255 56 260 24
847 248 55 253 22
816 241 53 246 21
785 235 51 240 20
770 229 50 234 99 Rockwell B
755 223 49 228 98
739 217 48 222 97
693 212 46 217 97
678 207 45 212 96
662 201 44 206 95
647 197 43 202 94
631 192 42 197 93
616 187 41 192 92
601 183 40 188 91
585 179 39 184 90
585 174 38 179 89
570 170 38 175 87
560 167 37 172 86
554 163 36 168 85
554 159 36 164 84
539 156 35 161 83
524 152 35 157 82
508 149 34 154 81
508 145 33 151 80
493 143 33 148 79
493 140 32 145 78
477 137 32 142 78
462 134 31 139 77
462 131 30 136 75
447 128 30 133 73
447 126 29 131 72
431 123 28 128 70
431 121 28 126 69
416 118 27 123 67
416 116 27 121 66
400 114 26 119 64
385 111 25 116 63

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