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Brinell hardness (HB),
Rockwell hardness (HRC)
and Vickers hardness (VH)
What is Brinell hardness (HB)? What is Rockwell
hardness (HRC)? What is Vickers hardness (VH)? How to convert from HRC
and VH to HB?
The Brinell hardness will scale the
hardness of materials by the penetration depth
of an indenter, which means we need to punch a small
pit on the surface of the metal castings.
The Rockwell hardness determines the hardness by
measuring the depth of penetration of an indenter
under a large load compared to the penetration made
by a preload.
The Vickers hardness has the same basic principle as
with all common measures of hardness, is to observe
the questioned material's ability to resist plastic
deformation from a standard source.
According to our experience, as for the iron and
steel castings, the Brinell hardness is more common
in China. Almost all the foundries have HB testers
in China. Some foundries have the Rockwell hardness
testers, but very seldom metal foundries will use
the VH testers.
The following is the conversion table for HB, HRC
and VH. We hope this comparison table can help you
to convert between them.
This article is from
www.iron-foundry.com
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Dandong Foundry's Blog.
Tensile Strength Rm
N/ mm |
Vickers hardness
HV |
Brinell hardness
HB |
Rockwell hardness
HRC |
| 250 |
80 |
76.0 |
- |
| 270 |
85 |
80.7 |
- |
| 285 |
90 |
85.2 |
- |
| 305 |
95 |
90.2 |
- |
| 320 |
100 |
95.0 |
- |
| 335 |
105 |
99.8 |
- |
| 350 |
110 |
105 |
- |
| 370 |
115 |
109 |
- |
| 380 |
120 |
114 |
- |
| 400 |
125 |
119 |
- |
| 415 |
130 |
124 |
- |
| 430 |
135 |
128 |
- |
| 450 |
140 |
133 |
- |
| 465 |
145 |
138 |
- |
| 480 |
150 |
143 |
- |
| 490 |
155 |
147 |
- |
| 510 |
160 |
152 |
- |
| 530 |
165 |
156 |
- |
| 545 |
170 |
162 |
- |
| 560 |
175 |
166 |
- |
| 575 |
180 |
171 |
- |
| 595 |
185 |
176 |
- |
| 610 |
190 |
181 |
- |
| 625 |
195 |
185 |
- |
| 640 |
200 |
190 |
- |
| 660 |
205 |
195 |
- |
| 675 |
210 |
199 |
- |
| 690 |
215 |
204 |
- |
| 705 |
220 |
209 |
- |
| 720 |
225 |
214 |
- |
| 740 |
230 |
219 |
- |
| 755 |
235 |
223 |
- |
| 770 |
240 |
228 |
20.3 |
| 785 |
245 |
233 |
21.3 |
| 800 |
250 |
238 |
22.2 |
| 820 |
255 |
242 |
23.1 |
| 835 |
260 |
247 |
24.0 |
| 850 |
265 |
252 |
24.8 |
| 865 |
270 |
257 |
25.6 |
| 880 |
275 |
261 |
26.4 |
| 900 |
280 |
266 |
27.1 |
| 915 |
285 |
271 |
27.8 |
| 930 |
290 |
276 |
28.5 |
| 950 |
295 |
280 |
29.2 |
| 965 |
300 |
285 |
29.8 |
| 995 |
310 |
295 |
31.0 |
| 1030 |
320 |
304 |
32.2 |
| 1060 |
330 |
314 |
33.3 |
| 1095 |
340 |
323 |
34.4 |
| 1125 |
350 |
333 |
35.5 |
| 1115 |
360 |
342 |
36.6 |
| 1190 |
370 |
352 |
37.7 |
| 1220 |
380 |
361 |
38.8 |
| 1255 |
390 |
371 |
39.8 |
| 1290 |
400 |
380 |
40.8 |
| 1320 |
410 |
390 |
41.8 |
| 1350 |
420 |
399 |
42.7 |
| 1385 |
430 |
409 |
43.6 |
| 1420 |
440 |
418 |
44.5 |
| 1455 |
450 |
428 |
45.3 |
| 1485 |
460 |
437 |
46.1 |
| 1520 |
470 |
447 |
46.9 |
| 1555 |
480 |
(456) |
47.7 |
| 1595 |
490 |
(466) |
48.4 |
| 1630 |
500 |
(475) |
49.1 |
| 1665 |
510 |
(485) |
49.8 |
| 1700 |
520 |
(494) |
50.5 |
| 1740 |
530 |
(504) |
51.1 |
| 1775 |
540 |
(513) |
51.7 |
| 1810 |
550 |
(523) |
52.3 |
| 1845 |
560 |
(532) |
53.0 |
| 1880 |
570 |
(542) |
53.6 |
| 1920 |
580 |
(551) |
54.1 |
| 1955 |
590 |
(561) |
54.7 |
| 1995 |
600 |
(570) |
55.2 |
| 2030 |
610 |
(580) |
55.7 |
| 2070 |
620 |
(589) |
56.3 |
| 2105 |
630 |
(599) |
56.8 |
| 2145 |
640 |
(608) |
57.3 |
| 2180 |
650 |
(618) |
57.8 |
| - |
660 |
- |
58.3 |
| - |
670 |
- |
58.8 |
| - |
680 |
- |
59.2 |
| - |
690 |
- |
59.7 |
| - |
700 |
- |
60.1 |
| - |
720 |
- |
61.0 |
| - |
740 |
- |
61.8 |
| - |
760 |
- |
62.5 |
| |
780 |
|
63.3 |
| - |
800 |
- |
64.0 |
| - |
820 |
- |
64.7 |
| - |
840 |
- |
65.3 |
| - |
860 |
- |
65.9 |
| - |
880 |
- |
66.4 |
| - |
900 |
- |
67.0 |
| - |
920 |
- |
67.5 |
| - |
940 |
- |
68.0 |
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