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Alnico Magnets
Alnico magnets are made primarily from aluminum, nickel, cobalt, copper, iron and sometimes titanium. There are cast or sintered Alnico magnet due to different process craft .
Applications of Alnico Magnets
• Water meter
• Sensors
• Electron tubes
• Traveling wave tubes
• Radar
• Holding magnets
• Clutches and bearings
• Motors
• Relays
• Controls
• Generators
• Receivers
• Telephones
• Microphones
• Bell ringers
• Loudspeakers
• Cow magnets
• Educational products
Attributes of Alnico
• Very temperature stable, great for high heat applications
• Working temperature can reach 550-600 °C
• Does not lend itself to conventional machining (hard and brittle)
• High residual induction and energy product compared to ceramic material
• Low coercive force compared to ceramic and rare earth materials (more subject to demagnetization)
| Magnetic Characteristic of Cast AlNiCo | ||||||||||||
| Grade | Br | Hcj | (BH)max | D | Equivalent MMPA Class | %Change perC | Tc | Tw | ||||
| mT | GS | KA/m3 | Koe | KJ/m3 | MGOe | g/cm3 | Near Br | Bear | Hcj | ℃ | ℃ | |
| LN9 | 680 | 6800 | 30 | 380 | 9 | 1.13 | 6.9 | AlNiCo3 | -0.03 | -0.02 | 810 | 450 |
| LN10 | 600 | 6000 | 40 | 500 | 10 | 1.2 | 6.9 | -0.03 | -0.02 | 810 | 450 | |
| LNG12 | 720 | 7200 | 45 | 500 | 12.4 | 1.55 | 7.0 | AlNiCo2 | -0.03 | -0.02 | 860 | 525 |
| LNG13 | 700 | 7000 | 48 | 600 | 12.8 | 1.6 | 7.0 | |||||
| LNG37 | 1200 | 12000 | 48 | 600 | 37.0 | 4.65 | 7.3 | AlNiCo5 | -0.02 | +0.02 | 860 | 525 |
| LNG40 | 1250 | 12500 | 48 | 600 | 40.0 | 5.00 | 7.3 | |||||
| LNG44 | 1250 | 12500 | 52 | 650 | 44.0 | 5.5 | 7.3 | |||||
| LNG52 | 1300 | 13000 | 56 | 700 | 52.0 | 6.5 | 7.3 | AlNiCo5DG | ||||
| LNG60 | 1350 | 13500 | 59 | 740 | 60.0 | 7.5 | 7.3 | AlNiCo5-7 | ||||
| LNGT28 | 1000 | 10000 | 58 | 720 | 28.0 | 3.50 | 7.3 | AlNiCo6 | -0.02 | +0.03 | 860 | 525 |
| LNGT36J | 700 | 7000 | 40 | 1750 | 36.0 | 4.50 | 7.3 | AlNiCo8HC | -0.025 | +0.02 | 860 | 550 |
| LNGT18 | 580 | 5800 | 100 | 1250 | 18.0 | 2.2 | 7.3 | AlNiCo8 | -0.025 | +0.02 | 860 | 550 |
| LNGT32 | 800 | 8000 | 100 | 1250 | 32.0 | 4.0 | 7.3 | AlNiCo8 | -0.025 | +0.02 | 860 | 550 |
| LNGT40 | 800 | 8000 | 110 | 1380 | 40.0 | 5.0 | 7.3 | |||||
| LNGT60 | 900 | 9000 | 110 | 1380 | 60.0 | 7.50 | 7.3 | AlNiCo9 | -0.025 | +0.02 | 860 | 550 |
| LNGT72 | 1050 | 10500 | 112 | 1400 | 72.0 | 9.00 | 7.3 | |||||
| Magnetic Characteristic of sintered AlNiCo | |||||||||||
| Grade | Br | Hcj | (BH)max | Tc | Tw | aBr | D | ||||
| mT | Gs | KA/m3 | Oe | KJ/m3 | MGOe | ℃ | ℃ | %/℃ | g/cm3 | ||
| FLN8 | 500 | 5000 | 40 | 500 | 9 | 1.13 | 760 | 450 | -0.022 | 7.3 | |
| FLNG12 | 700 | 7000 | 48 | 600 | 12.4 | 1.55 | 810 | 450 | -0.014 | 7.3 | |
| FLNGT18 | 600 | 6000 | 90 | 1130 | 18 | 2.2 | 860.0 | 450 | -0.02 | 7.3 | |
| FLNG34 | 1200 | 12000 | 48 | 600 | 34 | 4.25 | 890.0 | 450 | -0.016 | 7.3 | |
| FLNG37 | 1250 | 12500 | 48 | 600 | 37.0 | 4.62 | 890 | 450 | -0.016 | 7.3 | |
| FLNGT28 | 1050 | 10500 | 60 | 600 | 28.0 | 3.50 | 850 | 450 | -0.02 | 7.3 | |
| FLNGT38 | 800 | 8000 | 120 | 1500 | 28.0 | 4.75 | 850 | 450 | -0.02 | 7.3 | |
| FLNGT42 | 880 | 8800 | 120 | 1500 | 42.0 | 5.25 | 820 | 450 | -0.02 | 7.3 | |
| FLNGT33J | 700 | 7000 | 140 | 1750 | 33.0 | 4.13 | 850 | 450 | -0.025 | 7.3 | |
