Choose your Region

Technology

Hardness Conversion

 

Data Charts of Hardness

In all Seeger-Orbis data charts (catalog), the hardness is given in Rockwell C (HRC) and Vickers (HV). Vickers hardness can be measured on all thicknesses at an appropriate load. Due to the high test load of 150 kg, Rockwell measurement can only be applied to thicknesses in excess of 1.1 mm. Vickers hardness must be measured on smaller thicknesses.

Converting hardness values always involves inaccuracies. Whenever possible, conversions should be avoided, although it cannot always be avoided completely. This applies to all conversions, from hardness values to strength, and vice versa.

Converting hardness to strength according to DIN EN 180 18265 (2004-02), old: DIN 50180).

Tensile
Strength
N/mm2

Vickers
Hardness
(F >= 98N)
Rockwell Hardness
HRC
(1471±9N)
HR 15 N
(147±1N)
HR 30 N
(294±2N)
HR 45 N
(441±3N)
255
270
285
305
320
80
85
90
95
100
       
335
350
370
385
400
105
110
115
120
125
       
415
430
450
465
480
130
135
140
145
150
       
495
510
530
545
560
155
160
165
170
175
       
575
595
610
625
640
180
185
190
195
200
       
660
675
690
705
720
205
210
215
220
225
       
740
755
770
785
800
230
235
240
245
250


20.3
21.3
22.2


69.6
70.1
70.6


41.7
42.5
43.4


19.9
21.1
22.2
820
835
850
865
880
255
260
265
270
275
23.1
24.0
24.8
25.6
26.4
71.1
71.6
72.1
72.6
73.0
44.2
45.0
45.7
46.4
47.2
23.2
24.3
25.2
26.2
27.1
900
915
930
950
965
280
285
290
295
300
27.1
27.8
28.5
29.2
29.8
73.4
73.8
74.2
74.6
74.9
47.8
48.4
49.0
49.7
50.2
27.9
28.7
29.5
30.4
31.1
995
1030
1060
1095
1125
310
320
330
340
350
31.0
32.2
33.3
34.4
35.5
75.6
76.2
76.6
77.4
78.0
51.3
52.3
53.6
54.4
55.4
32.5
33.9
36.2
36.5
37.8
1155
1190
1220
1255
1290
360
370
380
390
400
36.6
37.7
38.8
39.8
40.8
78.6
79.2
79.8
80.3
80.8
56.4
57.4
58.4
59.3
60.2
39.1
40.4
41.7
42.9
44.1
1320
1350
1385
1420
1455
410
420
430
440
450
41.8
42.7
43.6
44.5
45.3
81.4
81.8
82.3
82.8
83.2
61.1
61.9
62.7
63.5
64.3
45.3
46.4
47.4
48.4
49.4
1485
1520
1555
1595
1630
460
470
480
490
500
46.1
46.9
47.7
48.4
49.1
83.6
83.9
84.3
84.7
85.0
64.9
65.7
66.4
67.1
67.7
50.4
51.3
52.2
53.1
53.9
1665
1700
1740
1775
1810
510
520
530
540
550
49.8
50.5
51.1
51.7
52.3
85.4
85.7
86.0
86.3
86.6
68.3
69.0
69.5
70.0
70.5
54.7
55.6
56.2
57.0
57.8
1845
1880
1920
1955
1995
560
570
580
590
600
53.0
53.6
54.1
54.7
55.2
86.9
87.2
87.5
87.8
88.0
71.2
71.7
72.1
72.7
73.2
58.6
59.3
59.9
60.5
61.2
2030
2070
2105
2145
2180
610
620
630
640
650
55.7
56.3
56.8
57.3
57.8
88.2
88.5
88.8
89.0
89.2
73.7
74.2
74.6
75.1
75.5
61.7
62.4
63.0
63.5
64.1
2210
2240
2280
2310
2350
660
670
680
690
700
58.3
58.8
59.2
59.7
60.1
89.5
89.7
89.8
90.1
90.3
75.9
76.4
76.8
77.2
77.6
64.7
65.3
65.7
66.2
66.7
2410
2480
2550
2610
2680
720
740
760
780
800
61.0
61.8
62.5
63.3
64.0
90.7
91.0
91.2
91.5
91.8
78.4
79.1
79.7
80.4
81.0
67.7
68.6
69.4
70.2
71.0
2750
2810
2880
2950
3020
820
840
860
880
900
64.7
65.3
65.9
66.4
67.0
92.1
92.3
92.5
92.7
92.9
81.7
82.2
82.7
83.1
83.6
71.8
72.2
73.1
73.6
74.2
3080
3150
920
940
67.5
68.0
93.0
93.2
84.0
84.4
74.8
75.4
Industries We Serve