The Alnico(Aluminum,Nickel,Cobalt) family was introduced in the 1930’s,It’s Characterized by excellent temperature stability,high residual induction,and Relatively high energies,These were the first materials specifically designed for Permanent magnets to be used in meters and instruments commercially.
Alnico is available in both cast and sintered forms.Sintered Alnico offer slightly Lower magnetic properties but better mechanical characteristics than cast Alnico. Conventional techniques other than by grindin.
Technical data of sintered AINICo permanent magnets
| Grade | （BH）max | Br | Hcj | Hcb | D | α Br | Tc | Remark | ||||
| KJ/cm3 | MGOe | mT | Gs | KA/m | Oe | KA/m | Oe | g/cm3 | %/k | ℃ | ||
| FLN8 | 8-10 | 1.0-1.25 | 520 | 5200 | 43 | 540 | 40 | 500 | 6.7 | -0.020 | 760 | Isoropic |
| FLNG12 | 12-14 | 1.5-1.75 | 700 | 7000 | 43 | 540 | 40 | 500 | 7.0 | -0.014 | 810 | |
| FLNGT18 | 14-16 | 1.75-2.0 | 570 | 5700 | 78 | 980 | 76 | 950 | 7.1 | -0.020 | 850 | |
| FLNG28 | 18-22 | 2.25-2.75 | 600 | 6000 | 107 | 1350 | 95 | 1200 | 7.2 | -0.020 | 850 | Anisotropic |
| FLNG34 | 28-33 | 3.5-4.15 | 1050 | 10500 | 47 | 590 | 46 | 580 | 7.2 | -0.016 | 850 | |
| FLNGT28 | 34-38 | 4.3-4.8 | 1100 | 11000 | 51 | 640 | 50 | 630 | 7.2 | -0.016 | 890 | |
| FLNG38J | 38-40 | 4.75-5.0 | 730 | 7300 | 163 | 2050 | 151 | 1900 | 7.2 | -0.200 | 850 | |
| FLNGT38 | 38-42 | 4.75-5.3 | 800 | 8000 | 126 | 1580 | 123 | 1550 | 7.2 | -0.020 | 850 | |
| FLNGT42 | 42-48 | 5.3-6.0 | 880 | 8800 | 122 | 1530 | 120 | 1500 | 7.25 | -0.020 | 850 | |
Technical data of cast AINICo permanent magnets
| Grade | Equicalent MMPA Class |
KJ/cm3 | MGOe | mT |
Gs | KA/m |
Oe | g/cm3 | %/K | Tc | Tw | Remark |
| LN9 | AlNiCo1 | 9.0 | 1.13 | 680 | 6800 | 30 | 380 | 6.9 | -0.03 | 760 | 450 | Isoropic |
| LN10 | 10.0 | 1.20 | 600 | 6000 | 40 | 500 | 6.9 | -0.03 | 760 | 450 | ||
| LNG12 | AlNiCo2 | 12.4 | 1.55 | 720 | 7200 | 45 | 500 | 7.0 | -0.03 | 810 | 450 | |
| LNG13 | 13.0 | 1.60 | 700 | 7000 | 48 | 600 | 7.0 | |||||
| LNG34 | AlNiCo5 | 34.0 | 4.30 | 1200 | 12000 | 48 | 600 | 7.3 | -0.02 | 860 | 525 | Anisotropic |
| LNG37 | 37.0 | 4.65 | 1200 | 12000 | 48 | 600 | 7.3 | |||||
| LNG40 | AlNiCo5DG | 40.0 | 5.00 | 1250 | 12500 | 48 | 600 | 7.3 | ||||
| LNG44 | 44.0 | 5.50 | 1250 | 12500 | 52 | 650 | 7.3 | |||||
| LNG52 | AlNiCo5-7 | 52.0 | 6.50 | 1300 | 13000 | 56 | 700 | 7.3 | ||||
| LNGT28 | AlNiCo6 | 28.0 | 3.50 | 1000 | 10000 | 58 | 720 | 7.3 | -0.025 | 860 | 550 | |
| LNGT36J | AlNiCo8H | 36.0 | 4.50 | 700 | 7000 | 140 | 1750 | 7.3 | -0.025 | 860 | 550 | |
| LNGT32 | AlNiCo8 | 32.0 | 4.0 | 800 | 8000 | 100 | 1250 | 7.3 | -0.025 | 860 | 550 | |
| LNGT40 | 40.0 | 5.0 | 800 | 8000 | 110 | 1380 | 7.3 | |||||
| LNGT60 | AlNiCo9 | 60.0 | 7.50 | 900 | 9000 | 110 | 1380 | 7.3 | -0.025 | 860 | 550 |