Aluminum Nickel Cobalt (AlNiCo)
The AlNiCo permanent magnet is an alloy composed of metal, aluminum, nickel, cobalt, iron and other trace elements. Due to the different production processes, the AlNiCo magnet can be separated as a molten alnico magnet and as a sintering alnico magnet. AlNiCo permanent magnets have a strong anti-corrosion capacity and good temperature stability. The highest working temperature can reach 550℃, and it does not need surface treatment.
Properties of Cast Alnico Magnet
| Grades | Equivalent MMPA Class | Remanence (Br) | Coercive Force (Hcb) | Maximum Energy Product (BH) max | Density g/cm3 | Reversible Temp. Coefficient α(Br） | Reversible Temp. Coefficient α(Hcj） | Curie Temp TC | Temp. Coefficient TW | Remark | |||
| mT | Gs | KA/m | Oe | KJ/m3 | MGOe | %/℃ | %/℃ | ºC | ºC | ||||
| 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 | ALNICO5 | 1250 | 12500 | 48 | 600 | 40 | 5 | 7.3 | -0.02 | +0.02 | 850 | 525 | |
| LNG44 | ALNICO5 | 1250 | 12500 | 52 | 650 | 44 | 5.5 | 7.3 | -0.02 | +0.02 | 850 | 525 | |
| LNG52 | ALNIC05DG | 1300 | 13000 | 56 | 700 | 52 | 6.5 | 7.3 | -0.02 | +0.02 | 850 | 525 | |
| LNG60 | ALNICO5-7 | 1350 | 13500 | 59 | 740 | 60 | 7.5 | 7.3 | -0.02 | +0.02 | 850 | 525 | |
| 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 |
Properties of Sintered Alnico Magnet
| Grades | Equivalent MMPA Class | Remanence (Br) | Coercive Force (Hcj) | Coercive Force (Hcb) | Maximum Energy Product (BH) max | Density g/cm3 | Reversible Temp. Coefficient α(Br） | Curie Temp TC | Temp. Coefficient TW | Remark | ||||
| mT | Gs | KA/m | Oe | KA/m | Oe | KJ/m3 | MGOe | %/℃ | ℃ | ℃ | ||||
| SLN8 | ALNICO3 | 520 | 5200 | 43 | 540 | 40 | 500 | 8-10 | 1.0-1.25 | 6.8 | -0.02 | 760 | 450 | Isotropy |
| SLNG12 | ALNICO2 | 700 | 7000 | 43 | 540 | 40 | 500 | 12-14 | 1.5-1.75 | 7 | -0.014 | 810 | 450 | |
| SLNGT18 | ALNICO8 | 600 | 6000 | 107 | 1350 | 95 | 1200 | 18-22 | 2.25-2.75 | 7.2 | -0.02 | 850 | 550 | |
| SLNGT28 | ALNICO6 | 1000 | 10000 | 57 | 710 | 56 | 700 | 28-30 | 3.5-3.8 | 7.2 | -0.02 | 850 | 525 | Anisotropy |
| SLNG34 | ALNICO5 | 1100 | 11000 | 51 | 640 | 50 | 630 | 34-38 | 3.5-4.15 | 7.2 | -0.016 | 890 | 525 | |
| SLNGT31 | ALNICO8 | 780 | 7800 | 106 | 1130 | 104 | 1300 | 33-36 | 3.9-4.5 | 7.2 | -0.02 | 850 | 550 | |
| SLNGT38 | 800 | 8000 | 126 | 1580 | 123 | 1550 | 38-42 | 4.75-5.3 | 7.2 | -0.02 | 850 | 550 | ||
| SLNGT42 | 880 | 8800 | 122 | 1530 | 120 | 1500 | 42-48 | 5.3-6.0 | 7.25 | -0.02 | 850 | 550 | ||
| SLNGT38J | ALNICO8HC | 730 | 7300 | 163 | 2050 | 151 | 1900 | 38-40 | 4.75-5.0 | 7.2 | -0.02 | 850 | 550 |
