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As our SEEGER rings are available in different designs and dimensions, the hardness of the material can vary significantly.
The hardness grade is specified in the data charts in Rockwell C (HRC) and Vickers (HV). While Vickers hardness can be measured on all thicknesses at an appropriate load, the high load of 150 kg of the Rockwell measurement can only be applied to thicknesses exceeding 1.1 mm.
Converting hardness values from different test methods always involves inaccuracies and, if ever possible, conversion should be avoided. However, it is not entirely possible to do without, especially when it comes to converting hardness values to strength and vice versa.
All relevant values can be found in the table below.
The conversion from hardness to strength was carried out to DIN EN10 18265 (2004-02).
Tensile strength | 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 |