Alnico magnets, composed of primarily aluminum, nickel, and cobalt, were developed in the 1940's. This class of magnet remains a preferred material because of it's 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, which are not possible with other magnetic materials.
Magnetic and Physical Properties of CastAlnico Magnet |
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Grades | Equivalent MMPA Class | Remanence | Coercive Force | MaximumEnergy Product | Density | Reversible Temp. Coefficient | Reversible Temp. Coefficient | Curie Temp. | Temp. Coefficient | Remark |
Br | Hcb | (BH)max | g/cm3 | α(Br) | α(Hcj) | TC | TW |
mT | Gs | KA/m | Oe | KJ/m3 | MGOe | %/℃ | %/℃ | ℃ | ℃ |
LN10 | ALNICO3 | 600 | 6000 | 40 | 500 | 10 | 1.2 | 6.9 | -0.03 | -0.02 | 810 | 450 | Isotropy |
LNG13 | ALNICO2 | 700 | 7000 | 48 | 600 | 12.8 | 1.6 | 7.2 | -0.03 | +0.02 | 810 | 450 |
LNGT18 | ALNICO8 | 580 | 5800 | 100 | 1250 | 18 | 2.2 | 7.3 | -0.025 | +0.02 | 860 | 550 |
LNG37 | ALNICO5 | 1200 | 12000 | 48 | 600 | 37 | 4.65 | 7.3 | -0.02 | +0.02 | 850 | 525 | Anisotropy |
LNG40 | 1250 | 12500 | 48 | 600 | 40 | 5 | 7.3 |
LNG44 | 1250 | 12500 | 52 | 650 | 44 | 5.5 | 7.3 |
LNG52 | ALNIC05DG | 1300 | 13000 | 56 | 700 | 52 | 6.5 | 7.3 |
LNG60 | ALNICO5-7 | 1350 | 13500 | 59 | 740 | 60 | 7.5 | 7.3 |
LNGT28 | ALNICO6 | 1000 | 10000 | 57.6 | 720 | 28 | 3.5 | 7.3 | -0.02 | +0.03 | 850 | 525 |
LNGT36J | ALNICO8HC | 700 | 7000 | 140 | 1750 | 36 | 4.5 | 7.3 | -0.025 | +0.02 | 860 | 550 |
LNGT38 | ALNICO8 | 800 | 8000 | 110 | 1380 | 38 | 4.75 | 7.3 | -0.025 | +0.02 | 860 | 550 |
LNGT40 | 820 | 8200 | 110 | 1380 | 40 | 5 | 7.3 | -0.025 | 860 | 550 |
LNGT60 | ALNICO9 | 900 | 9000 | 110 | 1380 | 60 | 7.5 | 7.3 | -0.025 | +0.02 | 860 | 550 |
LNGT72 | 1050 | 10500 | 112 | 1400 | 72 | 9 | 7.3 | -0.025 | 860 | 550 |
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