Alnico magnets, composed of primarily aluminum (Al), nickel (Ni), and cobalt (Co), were developed in the 1940's. This class of magnet remains a preferred material because of its excellent temperature stability, high magnetic flux density, and resistance to corrosion.
Alnico magnets are manufactured through a casting or sintering process. The casting process allows for the magnet to be manufactured into intricate and complex shapes. Sintered Alnico is made from a powdered mixture of ingredients that are pressed into a die under tons of pressure. The Sintering process allows for the magnets to be manufactured to tighter tolerances and higher mechanical strength.
| Product Name | AlNiCo magnet / alnico rod magnet / alnico magnets for speaker sensors |
| Grade | AlNiCo 5/8 |
| Material | Cast AlNiCo magnet |
| Certification | ISO/TS16949:2009 |
| Size | Customized Magnet Size |
| Magnetism direction | Customzied Specific Requirements |
| Tolerance | +/-0.05mm |
| keyword | AlNiCo magnet |
ALNICO MAGNET APPLICATIONS:
· Guitar pickups · Separators · Sensors · Radar · Holding magnets · Coin acceptors · Motors · Relays · Controls · Generators · Receivers · Telephones · Microphones · Bell ringers · Guitar pickups · Loudspeakers · Security systems · And much more Size Specifications: | Diameter (MM) | Thickness/Height/Length (MM) |
| 1.5-3.0 | 1.0-25.0 |
| 3.0-5.0 | 1.0-102.0 |
| 5.0-30.0 | 1.0-300.0 |
| 30.0-50.0 | 3.0-300.0 |
| 50.0-100.0 | 5.0-300.0 |
| 100.0-260.0 | 20.0-400.0 |
| Physical Properties of Cast Alnico |
| Curie Temperature (℃) | 760-890 |
| Max. Operating Temperature (℃) | 450-550 |
| Resistivity (μohm.cm) | 47-54 |
| Hardness (Hv) | 520-630 |
| Density (g/cm³) | 6.90-7.30 |
| Relative Recoil Permeability (μrec) | 1.70-4.70 |
| Saturation Field Strength (kOe,kA/m) | 2.7-6.3/215-500 |
| Temperature Coefficient of Br (%/℃) | -0.025 ~ -0.02 |
| Temperature Coefficient of iHc (%/℃) | +0.01 ~ +0.03 |
Typical Magnetic Performance Range for Cast Alnico Magnet, other standard | Grade | Br | Hcj | BHmax | USA stand | IEC stand | DIN stand | UK stand |
| kGs | mT | Oe | kA/m | KJ/m3 | MGOe | MMPA | IEC | DE | UK |
| LN10 | 6.5 | 650 | 530 | 42 | 10 | 1.2 | AlNiCo3 | AlNiCo9/3 | / | / |
| LNG11 | 7.2 | 720 | 480 | 37 | 11.2 | 1.4 | AlNiCo1 | AlNiCo8/4 | AlNiCo120 | AlNi |
| LNG13 | 7.0 | 700 | 620 | 50 | 13 | 1.6 | AlNiCo2 | AlNiCo12/6 | AlNiCo160 | AlNiCo |
| LNGT18 | 5.8 | 580 | 1250 | 100 | 18 | 2.2 | I. AlNiCo 8 | AlNiCo17/9 | / | / |
| LNG16 | 8.0 | 800 | 660 | 53 | 16 | 2.0 | [AlNiCo4] | / | / | / |
| LNG34 | 11.8 | 1180 | 550 | 44 | 34 | 4.25 | [AlNiCo5C] | / | / | / |
| LNG37 | 12.0 | 1200 | 600 | 48 | 37 | 4.65 | AlNiCo37/5 | AlNiCo500
| Alcomax2 |
| LNG40 | 12.2 | 1220 | 630 | 50 | 40 | 5.0 | AlNiCo5 | / | / |
| LNG44 | 12.5 | 1250 | 650 | 52 | 44 | 5.5 | AlNiCo44/5 | Alcomax3 |
| LNG52 | 13.0 | 1300 | 690 | 55 | 52 | 6.5 | AlNiCo5DG | AlNiCo52/6 | AlNiCo600 | Alcomax3 S.C. |
| LNG60 | 13.3 | 1330 | 750 | 60 | 60 | 7.5 | AlNiCo5-7 | / | AlNiCo700 | Columax |
| LNGT28 | 10.5 | 1050 | 700 | 56 | 28 | 3.5 | AlNiCo6 | AlNiCo26/6 | AlNiCo400 | Alcomax4 |
| LNGT30 | 10.5 | 1050 | 750 | 60 | 30 | 3.75 |
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| LNGT32 | 8.0 | 800 | 1280 | 102 | 32 | 4.0 | AlNiCo8 | AlNiCo38/11 | AlNiCo350 | Hycomax2 |
| LNGT40 | 8.2 | 820 | 1400 | 112 | 40 | 5.0 |
| LNGT44 | 8.8 | 880 | 1540 | 123 | 44 | 5.5 | AlNiCo8B | / | AlNiCo450 | Hycomax3 |
| LNGT48A | 9.3 | 930 | 1540 | 123 | 48 | 6.0 | AlNiCo8HE |
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| LNGT48B | 8.5 | 850 | 1650 | 132 | 48 | 6.0 |
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| LNGT60 | 9.0 | 900 | 1380 | 110 | 60 | 7.5 | AlNiCo60/11 | / | / |
| LNGT72 | 10.5 | 1050 | 1410 | 112 | 72 | 9.0 | AlNiCo9 | / | / | / |
| LNGT80 | 10.8 | 1080 | 1540 | 123 | 80 | 10.0 |
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| LNGT88 | 11.0 | 1100 | 1575 | 126 | 88 | 11.0 |
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| LNGT92 | 11.5 | 1150 | 1575 | 126 | 92 | 11.5 |
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| LNGT36J | 7.0 | 700 | 1750 | 140 | 36 | 4.5 | AlNiCo8HC | AlNiCo36/15 | / | / |
| LNGT40J | 7.2 | 720 | 1900 | 152 | 40 | 5.0 |
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| LNGT44J | 8.2 | 820 | 1800 | 144 | 44 | 5.5 | AlNiCo44/15 | / | / |
Cast Alnico Process Chart Raw material -> forming- >smelting-> heat treatment-> surface treatment->precision grinding->inspection ->packing 
