Hardness Conversion Table
Tensile
Strength
(N/mm2)
Brinell Hardness
(BHN)
Vickers Hardness
(HV)
Rockwell
Hardness
(HRB)
Rockwell Hardness
(HRC)
285
86
90
320
95
100
56.2
350
105
110
62.3
385
114
120
66.7
415
124
130
71.2
450
133
140
75.0
480
143
150
78.7
510
152
160
81.7
545
162
170
85.0
575
171
180
87.1
610
181
190
89.5
640
190
200
91.5
675
199
210
93.5
705
209
220
95.0
740
219
230
96.7
770
228
240
98.1
800
238
250
99.5
820
242
255
23.1
850
252
265
24.8
880
261
275
26.4
900
266
280
27.1
930
276
290
28.5
950
280
295
29.2
995
295
310
31.0
1030
304
320
32.2
1060
314
330
33.3
1095
323
340
34.4
1125
333
350
35.5
1155
342
360
36.6
1190
352
370
37.7
1220
361
380
38.8
1255
371
390
39.8
1290
380
400
40.8
1320
390
410
41.8
1350
399
420
42.7
1385
409
430
43.6
1420
418
440
44.5
1455
428
450
45.3
1485
437
460
46.1
1520
447
470
46.9
1555
456
480
47.7
1595
466
490
48.4
1630
475
500
49.1
1665
485
510
49.8
1700
494
520
50.5
1740
504
530
51.1
1775
513
540
51.7
1810
523
550
52.3
1845
532
560
53.0
1880
542
570
53.6
1920
551
580
54.1
1955
561
590
54.7
1995
570
600
55.2
2030
580
610
55.7
2070
589
620
56.3
2105
599
630
56.8
2145
608
640
57.3
2180
618
650
57.8
200 bhn max.
normally in soft cindition (before heat treatment) it is 200 to 240 BHN
Through hardening Process & Polymer quench 20% - As quench Required hardness - 35 - 40 hrc.
13-16 hrc
8.75 g/cm3
The hardness of En8 (having quite high C - 0.40%) will be dependent upon the supply condition - Annealed, Hardened, HT etc and may vary between say about 150 BHN to 40 HRC
Ultimate Tensile Strength is the (BHN*500)
200 bhn max.
approx. 50 HRC after hardening and tempering
The full form of HRC is Rockwell Hardness C Scale. It is a measure of the hardness of a material, typically metals, determined by how much force is required to create an indentation on the surface of the material.
The Brinell hardness number (BHN) of aluminum varies depending on the alloy and heat treatment. For example, pure aluminum typically has a BHN of around 15, while some aluminum alloys can have a BHN ranging from 60 to 150. It's important to note that BHN values can differ significantly based on the specific grade and processing of the aluminum.
The HRC value for aluminum typically ranges from 15 to 25. This value represents the hardness of the aluminum alloy, with higher values indicating a harder material. HRC values can vary depending on the specific alloy and heat treatment of the aluminum.
bhn
normally in soft cindition (before heat treatment) it is 200 to 240 BHN
HRC Culinary Academy was created in 2008.
BHN
EN 18 material has a hardness range of approximately 58-64 HRC (Rockwell Hardness). This makes it a relatively hard material suitable for applications requiring good wear resistance and strength.