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AlNiCo magnets
AlNiCo magnets are alloys of alluminium, nickel, cobalt, iron, copper and titanium. There are 2 production processes: casting and sintering, magnetization is possible only in axial direction.
AlNiCo 500 rod
1,46 € incl. 20% VAT from
AlNiCo ring, anisotropic
16,10 € incl. 20% VAT from
AlNiCo magnets have high remanence, but low coercivity - this fact determines the magnetization direction. Optimal ratio of diameter and length of the magnet is 1:4. Magnetic field of AlNiCo magnets can be weaken by demagnetizing. AlNiCo is a hard material, machining is possible by grinding.
Working temparature is between -270°C and +500°C. AlNiCo magnets are resistant against acids and solvents.
Table of magnetic properties of AlNiCo magnets:
| Material grade |
Remanence Br (T) |
Coercivity Hc (kA/m) |
Max. energy product (BxH)max (kJ/m3) |
Max. working temp. Tw (°C) |
|
| Normal Hcb | Intrinsic Hci | ||||
| AlNiCo 3 | 0.60 | 40 | 40 | 10 | <= 500 |
| AlNiCo 5 | 1.22 | 48 | 48 | 40 | <= 500 |
| AlNiCo 8 | 0.88 | 120 | 120 | 44 | <= 500 |
| AlNiCo 500 | 1.16 | 48 | 48 | 35 | <= 450 |
Other magnetic and mechanic parameters of AlNiCo magnets:
| Temp. coefficient of Br (%/°C) | Temp. coefficient of Hci (%/°C) | Magnetizing field (kA/m) | Curie temp. (°C) | Density (g/cm3) | Hardness (Hv) |
| - 0.03 | > 800 | 860 - 890 | 7.1 - 7.3 | 550 |
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