The Alnico material (composed predominantly of aluminum, nickel, and cobalt with minor amounts of other elements including titanium and copper) is manufactured through either a casting or sintering process. Compared to modern materials alnico has a low coercivity. The main advantage of alnico is the very low temperature coefficient and the wide temperature range from -273 oC to more than +400 oC for practical use.
Sintered AlNiCo magnet
| grade | Br | Hcj | Hcb | (BH)max | density | temperature coefficient % change per C |
curie temperature Tc |
remark | ||||
| mT | Gs | KA/m | Oe | KA/m | Oe | KJ/m3 | MGOe | g/cm3 | %/K | ℃ | ||
| FLN8 | 520 | 5200 | 43 | 540 | 40 | 500 | 8-10 | 1.0-1.25 | 6.8 | -0.022 | 760 | isotropic |
| FLNG12 | 700 | 7000 | 43 | 540 | 40 | 500 | 12-14 | 1.5-1.75 | 7.0 | -0.014 | 810 | |
| FLNGT14 | 570 | 5700 | 78 | 980 | 76 | 950 | 14-16 | 1.75-2.0 | 7.1 | -0.020 | 850 | |
| FLNGT18 | 560 | 5600 | 90 | 1130 | 88 | 1100 | 18-22 | 2.25-2.75 | 7.2 | -0.020 | 850 | |
| FLNG28 | 1050 | 10500 | 47 | 590 | 46 | 580 | 28-33 | 3.5-4.15 | 7.2 | -0.016 | 850 | anisotropic |
| FLNG34 | 1100 | 11000 | 51 | 640 | 50 | 630 | 34-38 | 4.3-4.8 | 7.2 | -0.016 | 890 | |
| FLNGT28 | 1000 | 10000 | 57 | 710 | 56 | 700 | 28-30 | 3.5-3.8 | 7.2 | -0.020 | 850 | |
| FLNGT31 | 780 | 7800 | 106 | 1130 | 104 | 1300 | 33-36 | 3.9-4.5 | 7.2 | -0.020 | 850 | |
| FLNG33J | 650 | 6500 | 150 | 1880 | 136 | 1700 | 31-36 | 4.15-4.5 | 7.2 | -0.020 | 850 | |
| FLNGT38 | 800 | 8000 | 126 | 1580 | 123 | 1550 | 38-42 | 4.75-5.3 | 7.2 | -0.020 | 850 | |
| FLNGT42 | 880 | 8800 | 122 | 1530 | 120 | 1500 | 42-48 | 5.3-6.0 | 7.25 | -0.020 | 850 | |
1.Any size is available on request.
2.Customized properties can be achieved if special method applied.
NOTE: 1mT=10Gs 1KA/m=4лOe 1KJ/m3=4л?0MGOe
Cast AlNiCo magnets,which are aluminum nickei-cobalt-iron alloys,are the most
established and widely used permanent magnet materials. Because of their high
flux density and superior temperature stability,cast magnets have been accepted
in the widest range of application.
Magnetic Characteristic of cast AlNiCo
Cast AlNiCo magnet
| material | Equivalent MMPA class | Br | Hcj | BHmax | Density | temperature coefficient |
curie temp. Tc |
working temp. Tw |
||||
| mT | Gs | KA/m | Oe | KJ/m3 | MGOe | g/cm3 | Near Br %/℃ | Near Hcj %/℃ | ℃ | ℃ | ||
| LN9 | AlNiCo 3 | 680 | 6800 | 30 | 380 | 9.0 | 1.13 | 6.9 | -0.03 | -0.02 | 810 | 450 |
| LN10 | 600 | 6000 | 40 | 500 | 10.0 | 1.20 | 6.9 | -0.03 | -0.02 | 810 | 450 | |
| LNG12 | AlNiCo 2 | 720 | 7200 | 45 | 500 | 12.4 | 1.55 | 7.0 | -0.03 | -0.02 | 810 | 450 |
| LNG13 | 700 | 7000 | 48 | 600 | 12.8 | 1.60 | 7.0 | -0.03 | -0.02 | 810 | 450 | |
| LNG37 | AlNiCo 5 | 1200 | 12000 | 48 | 600 | 37.0 | 4.65 | 7.3 | -0.02 | +0.02 | 860 | 525 |
| LNG40 | 1250 | 12500 | 48 | 600 | 40.0 | 5.00 | 7.3 | -0.02 | +0.02 | 860 | 525 | |
| LNG44 | 1250 | 12500 | 52 | 650 | 44.0 | 5.50 | 7.3 | -0.02 | +0.02 | 860 | 525 | |
| LNG52 | AlNiCo 5DG | 1300 | 13000 | 56 | 700 | 52.0 | 6.50 | 7.3 | -0.02 | +0.02 | 860 | 525 |
| LNG60 | AlNiCo 5-7 | 1350 | 13500 | 59 | 740 | 60.0 | 7.5 | 7.3 | -0.02 | +0.02 | 860 | 525 |
| LNGT28 | AlNiCo 6 | 1000 | 10000 | 58 | 720 | 28.0 | 3.50 | 7.3 | -0.02 | +0.03 | 860 | 525 |
| LNGT36J | AlNiCo 8HC | 700 | 7000 | 140 | 1750 | 36.0 | 4.50 | 7.3 | -0.025 | +0.02 | 860 | 550 |
| LNGT18 | AlNiCo 8 | 580 | 5800 | 100 | 1250 | 18.0 | 2.2 | 7.3 | -0.025 | +0.02 | 860 | 550 |
| LNGT32 | AlNiCo 8 | 800 | 8000 | 100 | 1250 | 32.0 | 4.0 | 7.3 | -0.025 | +0.02 | 860 | 550 |
| LNGT40 | 800 | 8000 | 110 | 1380 | 40.0 | 5.0 | 7.3 | -0.025 | +0.02 | 860 | 550 | |
| LNGT60 | AlNiCo 9 | 900 | 9000 | 110 | 1380 | 60.0 | 7.50 | 7.3 | -0.025 | +0.02 | 860 | 550 |
| LNGT72 | 1050 | 10500 | 112 | 1400 | 72.0 | 9.00 | 7.3 | -0.025 | +0.02 | 860 | 550 | |
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