Compass Needle Magnet FeCrCo is one of machinable permanent magnetic alloy, which has good plasticity, ductility and machinability. It has the similar properties with Alnico5. It can be made as different shapes and sizes such as wire, tube, bar, strip etc.
The alloy can be used at higher temperature and has good corrosion resistance. The high Curie temperature is about 680℃ and the highest working temperature can reach 400℃.
FeCrCo is widely used in automobile instrument, aviation,shipping instrument, oil exploration, navigation, counter, signal produce system, magcard, security system, hydraulic locate gauge, compass, etc.
USA Standard- permanent cast FeCrCo magnet industry standard of USA (MMPA)
| Grade | Br | Hc | BHmax | Density | %change Per C | Tw Max | Remark | |||
| kGs | mT | kA/m | Oe | KJ/m3 | MGOe | g/cm3 | %K | ℃ | ||
| FeCrCo1 | 8.8 | 880 | 37 | 460 | 12.7 | 1.60 | 7.7 | 0.036 | 500 | Isotropic |
| FeCrCo2 | 9.9 | 990 | 28 | 350 | 12.7 | 1.60 | 7.7 | 0.036 | 500 | |
| FeCrCo | 10.5 | 1050 | 16 | 200 | 8.0 | 1.00 | 7.7 | 0.036 | 500 | |
| FeCrCo1 | 9.0 | 900 | 39 | 490 | 13.0 | 1.63 | 7.7 | 0.036 | 500 | |
| FeCrCo5 | 13.5 | 1350 | 48 | 600 | 41.8 | 5.25 | 7.7 | 0.036 | 500 | Anisotropic |
| FeCrCo250 | 14.0 | 1400 | 20 | 250 | 15.9 | 2.00 | 7.7 | 0.036 | 500 | |
| FeCrCo640 | 12.0 | 1200 | 51 | 641 | 35.0 | 4.40 | 7.7 | 0.036 | 500 | |
Typical Magnetic Performance Range for Cast FeCrCo
| Grade | Br | Hcb | Hcj | BHmax | Density | Remark | ||||
| kGs | mT | kA/m | Oe | kA/m | Oe | KJ/m3 | MGOe | g/cm3 | ||
| FeCrCo10/3 | 8.2 | 820 | 27 | 340 | 29 | 360 | 10 | 1.25 | 7.6 | Isotropic |
| FeCrCo12/4 | 8.0 | 800 | 40 | 500 | 42 | 530 | 12 | 1.5 | 7.6 | |
| FeCrCo28/5 | 10.0 | 1000 | 45 | 570 | 46 | 580 | 28 | 3.5 | 7.6 | Anisotropic |
| FeCrCo30/4 | 11.5 | 1150 | 40 | 500 | 41 | 510 | 30 | 3.8 | 7.6 | |
| FeCrCo35/5 | 10.5 | 1050 | 50 | 630 | 51 | 640 | 35 | 4.4 | 7.6 | |
| FeCrCo36/5 | 12.0 | 1200 | 52 | 660 | 54 | 680 | 36 | 4.5 | 7.8 | |
| FeCrCo44/4 | 13.0 | 1300 | 44 | 560 | 45 | 570 | 44 | 5.5 | 7.7 | |
| FeCrCo52/5 | 13.5 | 1350 | 48 | 600 | 49 | 620 | 52 | 6.5 | 7.7 | |
SIZE RANGE
| shape | specification(mm) | state |
| Strip | thickness*width (0.05-4)*(100-200) | Soft Hard |
| Wire | φ0.1-φ8.0 | Soft Hard |
| Bar | φ8-φ60 | Forging Hot-roling |
| Tube | outer diameter*inner diameter φ1*(φ0.1-φ0.5) -φ30(φ1-φ10) | Soft Hard |
Application
Electro-acoustical Electronic industry Telephone Micro-motor Loudspeaker Computer-embroider machine Guard against theft Relay counter Family appliances Automobile meters Automatic controlling meter Hydraulic locate gauge Tachometer Nautical instrument Space aviation instruments Compass Magnetic medical treatment Oil exploration
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