Steel Hardness conversion calculator

Rockwell HRA Rockwell HRB Rockwell HRC Brinell Hardness HB Rockwell 15N Rockwell 30N Rockwell 45N Vickers HV N/mm² Calculate
Enter a figure into any of the fields and click calculate, the nearest values in each scale is shown, or zero if out of range. Values are approximate and for guidance only.

Steel hardness conversion chart - all values approximate.


This table shows approximate hardness of steel using Brinell, Rockwell B and C and Vickers scales. These conversion charts are provided for guidance only as each scales uses different methods of measuring hardness. The right hand column show an approximate equivalent tensile strength.
68.9
Rockwell HRA Rockwell HRB Rockwell HRC Brinell Hardness HB Rockwell 15N Rockwell 30N Rockwell 45N Vickers HV N/mm²
86.5 Details Not Available 70 760 94 86 77.6 1076 Details Not Available
86 Details Not Available 69 752 93.5 85 76.5 1044 Details Not Available
85.6 Details Not Available 68 745 93.2 84.4 75.4 940 Details Not Available
85 Details Not Available 67 746 92.9 83.6 74.2 900 Details Not Available
84.5 Details Not Available 66 735 92.5 82.8 73.2 865 Details Not Available
83.9 Details Not Available 65 711 92.2 81.9 72 832 Details Not Available
83.4 Details Not Available 64 695 91.8 81.1 71 800 Details Not Available
82.8 Details Not Available 63 681 91.4 80.1 69.9 772 Details Not Available
82.3 Details Not Available 62 658 91.1 79.3 68.8 746 Details Not Available
81.8 Details Not Available 61 642 90.7 78.4 67.7 720 Details Not Available
81.2 Details Not Available 60 627 90.2 77.5 66.6 697 Details Not Available
80.7 Details Not Available 59 613 89.8 76.6 65.5 674 Details Not Available
80.1 Details Not Available 58 601 89.3 75.7 64.3 653 Details Not Available
79.6 Details Not Available 57 592 88.9 74.8 63.2 633 Details Not Available
79 Details Not Available 56 572 88.3 73.9 62 613 Details Not Available
78.5 120 55 552 87.9 73 60.9 595 Details Not Available
78 120 54 534 87.4 72 59.8 577 Details Not Available
77.4 119 53 513 86.9 71.2 58.6 560 Details Not Available
76.8 119 52 504 86.4 70.2 57.4 544 Details Not Available
76.3 118 51 486 85.9 69.4 56.1 528 Details Not Available
75.9 117 50 469 85.5 68.5 55 513 Details Not Available
75.2 117 49 468 85 67.6 53.8 498 Details Not Available
74.7 116 48 456 84.5 66.7 52.5 484 1569
74.1 116 47 445 83.9 65.8 51.4 471 1520
73.6 115 46 430 83.5 64.8 50.3 458 1471
73.1 115 45 419 83 64 49 446 1447
72.5 114 44 415 82.5 63.1 47.8 434 1422
72 113 43 402 82 62.2 46.7 423 1390
71.5 113 42 388 81.5 61.3 45.5 412 1363
70.9 112 41 375 80.9 60.4 44.3 402 1314
70.4 112 40 373 80.4 59.5 43.1 392 1265
69.9 111 39 360 79.9 58.6 41.9 382 1236
69.4 110 38 348 79.4 57.7 40.8 372 1187
110 37 341 78.8 56.8 39.6 363 1157
68.4 109 36 331 78.3 55.9 38.4 354 1118
67.9 109 35 322 77.7 55 37.2 345 1089
67.4 108 34 314 77.2 54.2 36.1 336 1049
66.8 108 33 308 76.6 53.3 34.9 327 1035
66.3 107 32 300 76.1 52.1 33.7 318 1020
65.8 106 31 290 75.6 51.3 32.5 310 990
65.3 105 30 277 75 50.4 31.3 302 971
64.7 104 29 271 74.5 49.5 30.1 294 941
64.3 104 28 264 73.9 48.6 28.9 286 892
63.8 103 27 262 73.3 47.7 27.8 279 880
63.3 103 26 255 72.8 46.8 26.7 272 870
62.8 102 25 250 72.2 45.9 25.5 266 853
62.4 101 24 245 71.6 45 24.3 260 838
62 100 23 240 71 44 23.1 254 824
61.5 99 22 233 70.5 43.2 22 248 794
61 98 21 229 69.9 42.3 20.7 243 775
60.5 97 20 223 69.4 41.5 19.6 238 755
59 96 18 216 Details Not Available Details Not Available Details Not Available 230 716
58 95 16 212 Details Not Available Details Not Available Details Not Available 222 706
57.5 94 15 203 Details Not Available Details Not Available Details Not Available 213 696
57 93 13 119 Details Not Available Details Not Available Details Not Available 208 680
56.5 92 12 191 Details Not Available Details Not Available Details Not Available 204 667
56 91 10 186 Details Not Available Details Not Available Details Not Available 196 657
55.5 90 9 183 Details Not Available Details Not Available Details Not Available 192 648
55 89 8 180 Details Not Available Details Not Available Details Not Available 188 637
54 88 7 175 Details Not Available Details Not Available Details Not Available 184 617
53.5 87 6 170 Details Not Available Details Not Available Details Not Available 180 608
53 86 5 167 Details Not Available Details Not Available Details Not Available 176 685
52.5 85 4 163 Details Not Available Details Not Available Details Not Available 173 559
52 84 3 160 Details Not Available Details Not Available Details Not Available 170 555
51 83 2 156 Details Not Available Details Not Available Details Not Available 166 549
50.5 82 1 154 Details Not Available Details Not Available Details Not Available 163 539
50 81 0 149 Details Not Available Details Not Available Details Not Available 160 535
49.5 80 Details Not Available 147 Details Not Available Details Not Available Details Not Available 158 530
49 79 Details Not Available 143 Details Not Available Details Not Available Details Not Available 152 515
48.5 78 Details Not Available 141 Details Not Available Details Not Available Details Not Available 149 500
48 77 Details Not Available 139 Details Not Available Details Not Available Details Not Available 147 490
47 76 Details Not Available 137 Details Not Available Details Not Available Details Not Available 146 482
46.5 75 Details Not Available 135 Details Not Available Details Not Available Details Not Available 144 481
46 74 Details Not Available 131 Details Not Available Details Not Available Details Not Available 142 480
45.5 73 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available 140 475
45 72 Details Not Available 127 Details Not Available Details Not Available Details Not Available 137 467
44.5 71 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available 134 461
44 70 Details Not Available 121 Details Not Available Details Not Available Details Not Available 129 451
43.5 69 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available 127 431
43 68 Details Not Available 116 Details Not Available Details Not Available Details Not Available 124 422
42.5 67 Details Not Available 114 Details Not Available Details Not Available Details Not Available 121 412
42 66 Details Not Available 111 Details Not Available Details Not Available Details Not Available 118 402
41.8 65 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available 115 382
41.5 64 Details Not Available 107 Details Not Available Details Not Available Details Not Available 112 378
41 63 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available 108 373
40.5 62 Details Not Available 105 Details Not Available Details Not Available Details Not Available 104 Details Not Available
40 61 Details Not Available 103 Details Not Available Details Not Available Details Not Available 95 Details Not Available
39.5 60 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available 85 Details Not Available
39 59 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available 80 Details Not Available
38.5 58 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
38 57 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
37.8 56 Details Not Available 95 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
37.5 55 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
37 54 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
36.5 53 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
36 52 Details Not Available 90 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
35.5 51 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
35 50 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
34.8 49 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
34.5 48 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
34 47 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
33.5 46 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
33 45 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
32.5 44 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
32 43 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
31.5 42 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
31 41 Details Not Available 81 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
30.8 40 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
30.5 39 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
30 38 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
29.5 37 Details Not Available 76 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
29 36 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
28.5 35 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
28 34 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
27.8 33 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
27.5 32 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
27 31 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
26.5 30 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
26 29 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
25.5 28 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
25 27 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
24.5 26 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
24.2 25 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
24 24 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
23.5 23 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
23 22 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
22.5 21 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
22 20 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
21.5 19 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
21.2 18 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
21 17 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
20.5 16 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
20 15 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
Details Not Available 14 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
Details Not Available 13 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
Details Not Available 12 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
Details Not Available 11 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
Details Not Available 10 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
Details Not Available 9 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
Details Not Available 8 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
Details Not Available 7 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
Details Not Available 6 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
Details Not Available 5 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
Details Not Available 4 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
Details Not Available 3 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
Details Not Available 2 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
Details Not Available 1 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available
Details Not Available 0 Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available Details Not Available

Rockwell HRA Rockwell HRB Rockwell HRC Brinell Hardness Rockwell 15N Rockwell 30N Rockwell 45N Vickers HV N/mm²

Reference table: Steel Hardness conversion chart

Since the various types of hardness tests do not all measure the same combination of material properties, conversion from one hardness scale to another is only an approximate process. Because of the wide range of variation among different materials, it is not possible to state confidence limits for the errors in using a conversion chart.


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