Hardness Convert Table

1. HARDNESS CONVERT TABLE
(For hardened and alloy tool steel)

 

ROCKWELL (HR) VICKER BRINELL SHORE
 C
 A D G 15N 30N 45N HV HB/30 HS
80 92.0 86.5 96.5 92.0 87.0 1865
79 91.5 85.5 91.5 86.5 1787
78 91.0 84.5 96.0 91.0 85.5 1710
77 90.5 84.0 90.5 84.5 1633
76 90.0 83.0 95.5 90.0 83.5 1556
75 89.5 82.5 89.0 82.5 1478
74 89.0 81.5 95.0 88.5 81.5 1400
73 88.5 81.0 88.0 80.5 1323
72 88.0 80.0 94.5 87.0 79.5 1245
71 87.0 79.5 86.5 78.5 1160
70 86.5 78.5 94.0 86.0 77.5 1076
69 86.0  78.0 93.5 85.0 76.5 1004
68 85.5 77.0 84.5 75.5 942 97
67  85.0 76.0 93.0 83.5  74.5 894 95
66  84.5  75.5 92.5 83.0 73.0 854 92
65 84.0 74.5 92.0 82.0  72.0 820 91
64 83.5 74.0 81.0 71.0 789 88
63 83.0 73.0 91.5 80.0  70.0 763 87
62 82.5 72.5 91.0 79.0 69.0 739 85
61 81.5  71.5  90.5 78.5 67.5 716 83
60 81.0 71.0 90.0 77.5 66.5 695 614 81
59 80.5 70.0   89.5 76.5       65.5 675 600 80
58 80.0 69.0 75.5 64.0 655 587 78
57 79.5 68.5  89.0 75.0 63.0 636 573 76
56 79.0 67.5 88.5 74.0 62.0 617 560 75
55 78.5 67.0 88.0 73.0 61.0 598 547 74
54 78.0 66.0 87.5 72.0 59.5 580 534 72
53 77.0 65.5 87.0 71.0 58.5 562 522 71
52 77.0 64.5 86.5 70.5 57.5 545 509 69
51 76.5 64.0 86.0 69.5 56.0 528 496 68
50 76.0 63.0 85.5 68.5 55.0 513 484 67
49 75.5 62.0 85.0 67.5 54.0 498 472 66
48 74.5 61.5 84.5 66.5 52.5 485 460 64
47 74.0 60.5 84.0 66.0 51.5 471 448 63
46 73.5 60.0 83.5 65.0 50.0 458 437 62
45 73.0 59.0 83.0 64.0 49.0 446 426 60
44 72.5 58.5 82.5 63.0 48.0 435 415 58
43 72.0 57.5 82.0 62.0 46.5 424 404 57
42 71.5 56.5 81.5 61.5 45.5 413 393 56
41 71.0 56.0 81.0       60.5       44.5 403 382 55
40 70.5 55.5  80.5       59.5       43.0 393 372 54
39 70.0 54.5 80.0       58.5       42.0 383 362 52
38 69.5 54.0 79.5       57.5       41.0 373 352 51
37 69.0 53.0 79.0       56.5       39.5 363 342 50
36 68.5 52.5 78.5       56.0       38.5 353 332 49
35 68.0 51.5 78.0       55.0       37.0 343 322 48
34 67.5 50.5  77.0       54.0       36.0 334 313 47
33 67.0 50.0 76.5       53.0       35.0 325 305 46
32 66.5 49.0 76.0       52.0       33.5 317 297 44
31 66.0 48.5 75.5       51.5       32.5 309 290 43
30       65.5 47.5       92.0 75.0       50.5       31.5 301 283 42
29       65.0 47.0       91.0 74.5       49.5       30.0 293 276 41
28       64.5 46.0       90.0 74.0       48.5       29.0 285 270 41
27       64.0 45.5       89.0 73.5       47.5       28.0 278 265 40
26       63.5 44.5       88.0 72.5       47.0       26.5 271 260 39
25       63.0 44.0       87.0 72.0       46.0       25.5 264 255 38
24       62.5  43.0       86.0 71.5       45.0       24.0 257 250 37
23       62.0 42.5       84.5 71.0       44.0       23.0 251 245 36
22       61.5  41.5       83.5 70.5       43.0       22.0 246 240 35
21       61.0 41.0       82.5 70.0       42.5       20.5 241 235 35
20       60.5 40.0       81.0 69.5       41.5       19.5 236 230 34


2. HARDNESS CONVERT TABLE
(For Unhardened Steel and Steel of Soft Temper)

ROCKWELL(HR) BRINELL
B F G E K A 15T 30T 45T HB/5 HB/30
100     82.5     61.5     93.0     82.0     72.0 201 240
99     81.0     61.0     92.5     81.5     71.0 195 234
98     79.0     60.0     81.0     70.0 189 228
97     77.5     59.0     92.0     80.5     69.0 184 222
96     76.0     59.0     80.0     68.0 179 216
95     74.0     58.0     91.5     79.0     67.0 175 210
94     72.5     57.5     78.5     66.0 171 205
93     71.0     57.0     91.0     78.0     65.0 167 200
92     69.0   100.0     56.5     90.5     77.5     64.5 163 195
91     67.5     99.5     56.0     77.0     63.5 160 190
90     66.0     98.5     55.5     90.0     76.0     62.5 157 185
89     64.0     98.0     55.0     89.5     75.5     61.5 154 180
88     62.5     97.0     54.0     75.0     60.5 151 176
87     61.0     96.5     53.5     89.0     74.5     59.5 148 172
86     59.0     95.5     53.0     88.5     74.0     58.5 145 169
85     57.5     94.5     52.5     73.5     58.0 142 165
84     56.0     94.0     52.0     88.0     73.0     57.0 140 162
83     54.0     93.0     51.0     87.5     72.0     56.0 137 159
82     52.5     92.0     50.5     71.5     55.0 135 156
81     51.0     91.0     50.0     87.0     71.0     54.0 133 153
80     49.0     90.5     49.5     86.5     70.0     53.0 130 150
79     47.5     89.5     49.0     69.5     52.0 128 147
78     46.0     88.5     48.5     86.0     69.0     51.0 126 144
77     44.0     88.0     48.0     85.5     68.0     50.0 124 141
76     42.5     87.0     47.0     67.5     49.0 122 139
75     99.5     41.0     86.0     46.5     85.0     67.0     48.5 120 137
74     99.0     39.0     85.0     46.0     66.0     47.5 118 135
73     98.5     37.5     84.5     45.5     84.5     65.5     46.5 116 132
72     98.0     36.0     83.5     45.0     84.0     65.0     45.5 114 130
71     97.5     34.5   100.0     82.5     44.5     64.0     44.5 112 127
70     97.0     32.5     99.5     81.5     44.0     83.5     63.5     43.5 110 125
69     96.0     31.0     99.0     81.0     43.5     83.0     62.5     42.5 109 123
68     95.5     29.5     98.0     80.0     43.0     62.0     41.5 107 121
67     95.0     28.0     97.5     79.0     42.5     82.5     61.5     40.5 106 119
66     94.5     26.5     97.0     78.0     42.0     82.0     60.5     39.5 104 117
65     94.0     25.0     96.0     77.5     60.0     38.5 102 116
64     93.5     23.5     95.5     76.5     41.5     81.5     59.5     37.5 101 114
63     93.0     22.0     95.0     75.5     41.0     81.0     58.5     36.5 99 112
62     92.0     20.5     94.5     74.5     40.5     58.0     35.5 98 110
61     91.5     19.0     93.5     74.0     40.0     80.5     57.0     34.5 96 109
60     91.0     17.5     93.0     73.0     39.5     56.5     33.5 95 107
59     90.5     16.0     92.5     72.0     39.0     80.0     56.0     32.0 94 106
58     90.0     14.5     92.0     71.0     38.5     79.5     55.0     31.0 92 104
57     89.5     13.0     91.0     70.5     38.0     54.5     30.0 91 103
56     89.0     11.5     90.5     69.5     79.0     54.0     29.0 90 101
55     88.0     10.0     90.0     68.5     37.5     78.5     53.0     28.0 89 100
54     87.5       8.5     89.5     68.0     37.0     52.5     27.0 87
53     87.0       7.0     89.0     67.0     36.5     78.0     51.5     26.0 86
52     86.5       5.5     88.0     66.0     36.0     77.5     51.0     25.0 85
51     86.0       4.0     87.5     65.0     35.5     50.5     24.0 84
50     85.5       2.5     87.0     64.5     35.0     77.0     49.5     23.0 83
49     85.0     86.5     63.5     76.5     49.0     22.0 82
48     84.5     85.5     62.5     34.5     48.5     20.5 81
47     84.0     85.0     61.5     34.0     76.0     47.5     19.5 80
46     83.0     84.5     61.0     33.5     75.5     47.0     18.5
45     82.5     84.0     60.0     33.0     46.0     17.5 79
44     82.0     83.5     59.0     32.5     75.0     45.5     16.5 78
43     81.5     82.5     58.0     32.0     74.5     45.0     15.5 77
42     81.0     82.0     57.5     31.5     44.0     14.5 76
41     80.5     81.5     56.5     31.0     74.0     43.5     13.5 75


3. HARDNESS CONVERT TABLE
 (For Grey and Malleable Cast Iron and Malleable Cast Iron and Most Non-Ferrous Metal)

B F E K A H 15T 30T 45T HB/5
41       80.5       81.5       56.5       31.0       74.0       43.5       13.5 75
40       79.5       81.0       55.5       73.5       43.0       12.5
39       79.0       80.0       54.5       30.5       42.0       11.0 74
38       78.5       79.5       54.0       30.0       73.0       41.5       10.0 73
37       78.0       79.0       53.0       39.5       72.5       40.5         9.0 72
36       77.5       78.5       52.5       39.0     100.0       40.0         8.0
35       77.0       78.0       51.5       28.5       99.5       72.0       39.5         7.0 71
34       76.5       77.0       50.5       28.0       99.0       71.5       38.5         6.0 70
33       75.5       76.5       49.5       38.0         5.0 69
32       75.0       76.0       48.5       27.5       98.5       71.0       37.5         4.0
31       74.5       75.5       48.0       27.0       98.0       36.5         3.0 68
30       74.0       75.0       47.0       26.5       70.5       36.0         2.0 67
29       73.5       74.0       46.0       26.0       97.5       70.0       35.6         1.0
28       73.0       73.5       45.0       25.5       97.0       34.5 66
27       72.5       73.0       44.5       25.0       96.5       69.5       34.0
26       72.0       72.5       43.5       24.5       69.0       33.0 65
25       71.0       72.0       42.0       96.0       32.5 64
24       70.5       71.0       41.5       24.0       95.5       68.5       32.0
23       70.0       70.5       41.0       23.5       68.0       31.0 63
22       69.5       70.0       40.0       23.0       95.0       30.5
21       69.0       69.5       39.0       22.5       94.5       67.5       29.5 62
20       68.5       68.5       38.0       22.0       29.0
19       68.0       68.0       37.5       21.5       94.0       67.0       28.5 61
18       67.0       67.5       36.5       93.5       66.5       27.5
17       66.5       67.0       35.5       21.0       93.0       27.0 60
16       66.0       66.5       35.0       20.5       66.0       26.0
15       65.5       65.5       34.0       20.0       92.5       65.5       25.5 59
14       65.0       65.0       33.0       92.0       25.0
13       64.5       64.5       32.0       65.0       24.0 58
12       64.0       64.0       31.5       91.5       64.5       23.5
11       63.5       63.5       30.5       91.0       23.0
10       63.0       62.5       29.5       90.5       64.0       22.0 57
9       62.0       62.0       29.0       21.5
8       61.5       61.5       28.0       90.0       63.5       20.5
7       61.0       61.0       27.0       89.5       63.0       20.0 56
6       60.5       60.5       26.0       19.5
5       60.0       60.0       25.5       89.0       62.5       18.5 55
4       59.5       59.0       24.5       88.5       62.0       18.0
3       59.0       58.5       23.5       88.0       17.0
2       58.0       58.0       23.0       61.5       16.5 54
1       57.5       57.5       22.0       87.5       61.0       16.0
0       57.0       57.0       21.0       87.0       15.0 53
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