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DunBen
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.
Cast Alnico is manufactured by pouring a molten metal alloy into a mold and then further processing it through various heat-treat cycles.
The resulting magnet has a dark gray exterior appearance, and may have a rough surface.Machined surfaces have a shiny appearance similar to steel. It permits high temperature operation.
Alnico 8 and Alnico 9 has a higher coercive force and is usually used in disc shapes.
| Grade | MMPA Equivalent | Br | Hcb | Hcj | (BH)max | Remark | ||||
| mT | Gs | kA/m | Oe | kA/m | Oe | kJ/m3 | MGOe | |||
| LN10 | Alnico3 | 600 | 6000 | 40 | 500 | 43 | 540 | 10 | 1.20 | Isotropic |
| LNG13 | Alnico2 | 680 | 6800 | 48 | 600 | 51 | 640 | 13 | 1.60 | |
| LNGT18 | Alnico8 | 580 | 5800 | 90 | 1130 | 92 | 1160 | 18 | 2.20 | |
| LNG37 | Alnico5 | 1200 | 12000 | 48 | 600 | 49 | 610 | 37 | 4.65 | Anisotropic |
| LNG40 | 1250 | 12500 | 48 | 600 | 49 | 610 | 40 | 5.00 | ||
| LNG44 | 1250 | 12500 | 52 | 650 | 53 | 660 | 44 | 5.50 | ||
| LNG52 | Alnico5DG | 1300 | 13000 | 56 | 700 | 57 | 710 | 52 | 6.50 | |
| LNG60 | Alnico5-7 | 1350 | 13500 | 59 | 740 | 60 | 750 | 60 | 7.50 | |
| LNGT28 | Alnico6 | 1000 | 10000 | 58 | 720 | 59 | 740 | 28 | 3.50 | |
| LNGT36J | Alnico8HC | 700 | 7000 | 140 | 1750 | 148 | 1850 | 36 | 4.50 | |
| LNGT38 | Alnico8 | 800 | 8000 | 110 | 1380 | 112 | 1400 | 38 | 4.75 | |
| LNGT44 | 880 | 8800 | 120 | 1500 | 122 | 1530 | 44 | 5.50 | ||
| LNGT60 | Alnico9 | 900 | 9000 | 110 | 1380 | 112 | 1400 | 60 | 7.50 | |
| LNGT72 | 1050 | 10500 | 112 | 1400 | 114 | 1430 | 72 | 9.00 | ||
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.
Cast Alnico is manufactured by pouring a molten metal alloy into a mold and then further processing it through various heat-treat cycles.
The resulting magnet has a dark gray exterior appearance, and may have a rough surface.Machined surfaces have a shiny appearance similar to steel. It permits high temperature operation.
Alnico 8 and Alnico 9 has a higher coercive force and is usually used in disc shapes.
| Grade | MMPA Equivalent | Br | Hcb | Hcj | (BH)max | Remark | ||||
| mT | Gs | kA/m | Oe | kA/m | Oe | kJ/m3 | MGOe | |||
| LN10 | Alnico3 | 600 | 6000 | 40 | 500 | 43 | 540 | 10 | 1.20 | Isotropic |
| LNG13 | Alnico2 | 680 | 6800 | 48 | 600 | 51 | 640 | 13 | 1.60 | |
| LNGT18 | Alnico8 | 580 | 5800 | 90 | 1130 | 92 | 1160 | 18 | 2.20 | |
| LNG37 | Alnico5 | 1200 | 12000 | 48 | 600 | 49 | 610 | 37 | 4.65 | Anisotropic |
| LNG40 | 1250 | 12500 | 48 | 600 | 49 | 610 | 40 | 5.00 | ||
| LNG44 | 1250 | 12500 | 52 | 650 | 53 | 660 | 44 | 5.50 | ||
| LNG52 | Alnico5DG | 1300 | 13000 | 56 | 700 | 57 | 710 | 52 | 6.50 | |
| LNG60 | Alnico5-7 | 1350 | 13500 | 59 | 740 | 60 | 750 | 60 | 7.50 | |
| LNGT28 | Alnico6 | 1000 | 10000 | 58 | 720 | 59 | 740 | 28 | 3.50 | |
| LNGT36J | Alnico8HC | 700 | 7000 | 140 | 1750 | 148 | 1850 | 36 | 4.50 | |
| LNGT38 | Alnico8 | 800 | 8000 | 110 | 1380 | 112 | 1400 | 38 | 4.75 | |
| LNGT44 | 880 | 8800 | 120 | 1500 | 122 | 1530 | 44 | 5.50 | ||
| LNGT60 | Alnico9 | 900 | 9000 | 110 | 1380 | 112 | 1400 | 60 | 7.50 | |
| LNGT72 | 1050 | 10500 | 112 | 1400 | 114 | 1430 | 72 | 9.00 | ||
