Alloys for Laminations and Core Packages
Depending on the requirements, several soft magnetic alloys with different permeability leves and saturation flux density are available. Besides the conventional silicon steels (e. g. TRAFOPERM®), NiFe alloys are used for higher demands on AL value, core losses or pulse permeability.
The best magnetic values are achieved with 80 % NiFe-alloys (MUMETALL®, or the higher grade VACOPERM® 100). 50 % NiFe-alloys (PERMENORM® 5000 H2) could be an alternative. Due to their higher saturation flux density they often allow a smaller built of the component.
The table below shows typical magnetic properties of the named alloys. Please consider that the practical values are somewhat lower due to mechanical handling and air gap effects. These values are defined in the "Magnetic Qualities". For more information please download our Product Information from the page Forms of Supply.
Alloy Properties
| Alloy | Composition | µ4 (50 Hz) |
HC [A/m] |
BS [T] |
TCurie [°C] |
Density [g/cm³] |
|---|---|---|---|---|---|---|
| MUMETALL® | 80 % NiFe | 30000 | 3 | 0,80 | 400 | 8,7 |
| VACOPERM® 100 | 80 % NiFe | 60000 | 2 | 0,78 | 400 | 8,7 |
| PERMENORM® 5000 H2 | 50 % NiFe | 10000 | 10 | 1,55 | 440 | 8,25 |
| TRAFOPERM® N2 | 3 % SiFe | 1600* | 25 | 2,03 | 750 | 7,65 |
µ4 : µr at 0,4 A/m
* at 1,6 A/m
Typical cores losses in W/kg measured with sinusoidal induction
| Alloy | Strip thickness (mm) |
50 Hz | 400 Hz | 1 kHz | 10 kHz | 20 kHz |
|---|---|---|---|---|---|---|
| MUMETALL® | 0,35 | 0,075 (0,5) | --- | --- | --- | --- |
| MUMETALL® | 0,2 | --- | 1,6 (0,5) | 8,0 (0,5) | --- | --- |
| MUMETALL® | 0,1 | --- | 0,75 (0,5) | 3,6 (0,5) | 35 (0,2) | 30 (0,1) |
| PERMENORM 5000 H2® | 0,35 | 0,125 (0,5) 0,4 (1,0) |
--- | --- | --- | --- |
| PERMENORM 5000 H2® | 0,2 | --- | 2,3 (0,5) 8,5 (1,0) |
11 (0,5) 40 (1,0) |
--- | --- |
| PERMENORM 5000 H2® | 0,1 | --- | 1,05 (0,5) 3,8 (1,0) |
4,6 (0,5) 18 (1,0) |
42 (0,2) | 34 (0,1) |
| TRAFOPERM N2® | 0,35 | 0,23 (0,5) 0,85 (1,0) 1,85 (1,5) |
5,75 (0,5) 21 (1,0) |
22 (0,5) 80 (1,0) |
--- | --- |
| TRAFOPERM N2® | 0,1 | --- | 2,6 (0,5) 9,75 (1,0) |
9,25 (0,5) 33 (1,0) |
60 (0,2) | 50 (0,1) |