Steel Hardness Conversion Chart
Rockwell C, 150kg |
Rockwell B, 100kg |
Brinell, 3000kg 10mm Ball |
Vickers |
Shore Scleroscope |
Tensile Strength, 1000 lbs/in2 |
68 |
- |
- |
940 |
97 |
- |
67 |
- |
- |
900 |
95 |
- |
66 |
- |
- |
865 |
92 |
- |
65 |
- |
739 |
832 |
91 |
- |
64 |
- |
722 |
800 |
88 |
- |
63 |
- |
705 |
772 |
87 |
- |
62 |
- |
688 |
746 |
85 |
- |
61 |
- |
670 |
720 |
83 |
- |
60 |
- |
654 |
697 |
81 |
- |
59 |
- |
634 |
674 |
80 |
326 |
58 |
- |
615 |
653 |
78 |
315 |
57 |
- |
595 |
633 |
76 |
305 |
56 |
- |
577 |
613 |
75 |
295 |
55 |
- |
560 |
595 |
74 |
287 |
54 |
- |
543 |
577 |
72 |
278 |
53 |
- |
525 |
560 |
71 |
269 |
52 |
- |
512 |
544 |
69 |
262 |
51 |
- |
496 |
528 |
68 |
253 |
50 |
- |
481 |
513 |
67 |
245 |
49 |
- |
469 |
498 |
66 |
239 |
48 |
- |
455 |
484 |
64 |
232 |
47 |
- |
443 |
471 |
63 |
225 |
46 |
- |
432 |
458 |
62 |
219 |
45 |
- |
421 |
446 |
60 |
212 |
44 |
- |
409 |
434 |
58 |
206 |
43 |
- |
400 |
423 |
57 |
201 |
42 |
- |
390 |
412 |
56 |
196 |
41 |
- |
381 |
402 |
55 |
191 |
40 |
- |
371 |
392 |
54 |
186 |
39 |
- |
362 |
382 |
52 |
181 |
38 |
- |
353 |
372 |
51 |
176 |
37 |
- |
344 |
363 |
50 |
172 |
36 |
(109) |
336 |
354 |
49 |
168 |
35 |
- |
327 |
345 |
48 |
163 |
34 |
(108) |
319 |
336 |
47 |
159 |
33 |
- |
311 |
327 |
46 |
154 |
32 |
(107) |
301 |
318 |
44 |
150 |
31 |
(106) |
294 |
310 |
43 |
146 |
30 |
- |
286 |
302 |
42 |
142 |
29 |
- |
279 |
294 |
41 |
138 |
28 |
(104) |
271 |
286 |
41 |
134 |
27 |
(103) |
264 |
279 |
40 |
131 |
26 |
- |
258 |
272 |
38 |
127 |
25 |
- |
253 |
266 |
38 |
124 |
24 |
(101) |
247 |
260 |
37 |
121 |
23 |
100 |
243 |
254 |
36 |
118 |
22 |
99 |
237 |
248 |
35 |
115 |
21 |
- |
231 |
243 |
35 |
113 |
20 |
98 |
226 |
238 |
34 |
110 |
(18) |
97 |
219 |
230 |
33 |
106 |
(16) |
95 |
212 |
222 |
32 |
102 |
(14) |
94 |
203 |
213 |
31 |
98 |
(12) |
92 |
194 |
204 |
29 |
94 |
(10) |
91 |
187 |
196 |
28 |
90 |
(8) |
90 |
179 |
188 |
27 |
87 |
(6) |
87 |
171 |
180 |
26 |
84 |
(4) |
85 |
165 |
173 |
25 |
80 |
(2) |
83 |
158 |
166 |
24 |
77 |
0 |
82 |
152 |
160 |
24 |
75 |

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