HARDNESS CONVERSION TABLE FOR CARBON & ALLOY STEELS
All values are approximate
Chart best viewed on desktop
|
Brinell |
Rockwell Hardness Numbers |
Tensile |
|||||
|
C |
A |
15N |
B |
30T |
1000 |
kgf/mm |
|
|
– |
66 | 84.5 | 92.5 | – | – | – | – |
|
722 |
64 | 83.4 | 91.8 | – | – | – | – |
|
688 |
62 | 82.3 | 91.1 | – | – | – | – |
|
654 |
60 | 81.2 | 90.2 | – | – | – | – |
|
615 |
58 | 80.1 | 89.3 | – | – | – | – |
|
577 |
56 | 79.0 | 88.3 | – | – | 313 | 220 |
|
543 |
54 | 78.0 | 87.4 | – | – | 292 | 205 |
|
512 |
52 | 76.8 | 86.4 | – | – | 273 | 192 |
|
481 |
50 | 75.9 | 85.5 | – | – | 255 | 179 |
|
455 |
48 | 74.7 | 84.5 | – | – | 237 | 167 |
|
443 |
47 | 74.1 | 83.9 | – | – | 229 | 161 |
|
432 |
46 | 73.6 | 83.5 | – | – | 222 | 156 |
|
421 |
45 | 73.1 | 83.0 | – | – | 215 | 151 |
|
409 |
44 | 72.5 | 82.5 | – | – | 208 | 146 |
|
400 |
43 | 72.0 | 82.0 | – | – | 201 | 141 |
|
390 |
42 | 71.5 | 81.5 | – | – | 194 | 136 |
|
381 |
41 | 70.9 | 80.9 | – | – | 188 | 132 |
|
371 |
40 | 70.4 | 80.4 | – | – | 181 | 127 |
|
362 |
39 | 69.9 | 79.9 | – | – | 176 | 124 |
|
353 |
38 | 69.4 | 79.4 | – | – | 171 | 120 |
|
344 |
37 | 68.9 | 78.8 | – | – | 167 | 117 |
|
336 |
36 | 68.4 | 78.3 | – | – | 162 | 114 |
|
327 |
35 | 67.9 | 77.7 | – | – | 157 | 110 |
|
319 |
34 | 67.4 | 77.2 | – | – | 153 | 108 |
|
311 |
33 | 66.8 | 76.6 | – | – | 149 | 105 |
|
301 |
32 | 66.3 | 76.1 | – | – | 145 | 102 |
|
294 |
31 | 65.8 | 75.6 | – | – | 142 | 100 |
|
286 |
30 | 65.3 | 75.0 | – | – | 138 | 97 |
|
279 |
29 | 64.7 | 74.5 | – | – | 135 | 95 |
|
271 |
28 | 64.3 | 73.9 | – | – | 132 | 93 |
|
264 |
27 | 63.8 | 73.3 | – | – | 128 | 90 |
|
258 |
26 | 63.3 | 72.8 | – | – | 125 | 88 |
|
253 |
25 | 62.8 | 72.2 | – | – | 122 | 86 |
|
247 |
24 | 62.4 | 71.6 | – | – | 120 | 84 |
|
243 |
23 | 62.0 | 71.0 | – | – | 117 | 82 |
|
240 |
– | – | – | 100 | 82.0 | 116 | 82 |
|
234 |
– | – | – | 99 | 81.5 | 112 | 79 |
|
222 |
– | – | – | 97 | 80.5 | 106 | 75 |
|
210 |
– | – | – | 95 | 79.0 | 101 | 71 |
|
200 |
– | – | – | 93 | 78.0 | 96 | 67 |
|
195 |
– | – | – | 92 | 77.5 | 93 | 65 |
|
185 |
– | – | – | 90 | 76.0 | 89 | 63 |
|
176 |
– | – | – | 88 | 75.0 | 85 | 60 |
|
169 |
– | – | – | 86 | 74.0 | 81 | 57 |
|
162 |
– | – | – | 84 | 73.0 | 78 | 55 |
|
156 |
– | – | – | 82 | 71.5 | 75 | 53 |
|
150 |
– | – | – | 80 | 70.0 | 72 | 51 |
|
144 |
– | – | – | 78 | 69.0 | – | – |
|
139 |
– | – | – | 76 | 67.5 | – | – |
|
135 |
– | – | – | 74 | 66.0 | – | – |
|
130 |
– | – | – | 72 | 65.0 | – | – |
|
125 |
– | – | – | 70 | 63.5 | – | – |
|
121 |
– | – | – | 68 | 62.0 | – | – |
|
117 |
– | – | – | 66 | 60.5 | – | – |
|
114 |
– | – | – | 64 | 59.5 | – | – |
Contact Falcon Metals and Forgings
1-800-631-0728
NJ: 201-670-8300
CANADA: 800-544-5501
Fax: 201-670-0033
