AlNiCo Cast Permanent Magnetic Alloys
AlNiCo8/4, AlNiCo9/5, AlNiCo12/6, AlNiCo17/9, AlNiCo37/5, AlNiCo44/5, AlNiCo52/6, AlNiCo26/6, AlNiCo38/11, AlNiCo60/11, AlNiCo36/15, AlNiCo28/10, AlNiCo44/14, AlNiCo72/11, AlNiCo80/12
Alnico is the first developed permanent magnet material. It is an alloy composed of aluminum, nickel, cobalt, iron and other trace metal elements. Alnico permanent magnet material was successfully developed in the 1930s. At that time, it had the best magnetic performance and small temperature coefficient, so it was most widely used in permanent magnet motors.
Chemical Composition and Magnetic Properties
Alloy | Chemical Composition, % | Magnetic properties | Typical density/g.cm-3 |
Al | Co | Cu | Nb | Ni | Ti | Fe | Maximum eneMax energy product (BH)max, kJ.m-2 | Magnetic retentivity Br/mT | Corecive force Hcb/kA.m-1 | Corecive force Hci/kA.m-1 | Relative recovery perameability/μr |
Typical value | Specified minimum value |
AlNiCo8/4 | 11-13 | 0-1 | 2-4 | – | 21-28 | 0-1 | Rest | 8 | 520 | 40 | 43 | 4.5-5.5 | 6.9 |
AlNiCo9/5 | 11-13 | 0-5 | 2-4 | – | 21-28 | 0-1 | Rest | 9 | 550 | 44 | 47 | 6.0-7.0 | – |
AlNiCo12/6 | 9-13 | 12-17 | 2-6 | – | 18-24 | 0-1 | Rest | 11.6 | 630 | 52 | 55 | 4.0-5.5 | – |
AlNiCo17/9 | 6-8 | 24-34 | 3-6 | – | 13-19 | 5-9 | Rest | 17 | 580 | 80 | 86 | 3.0-4.0 | 7.3 |
AlNiCo37/5 | 8-9 | 23-26 | 3-4 | 0-1 | 14-16 | – | Rest | 37 | 1180 | 48 | 49 | 3.0-4.5 | 7.3 |
AlNiCo44/5 | 8-9 | 23-26 | 3-4 | 0-1 | 13-15 | – | Rest | 44 | 1200 | 52 | 53 | 2.5-4.0 | 7.3 |
AlNiCo52/6 | 8-9 | 23-26 | 3-4 | 0-1 | 13-15 | – | Rest | 52 | 1250 | 55 | 56 | 1.5-3.0 | 7.3 |
AlNiCo26/6 | 7-9 | 25-27 | 3-4 | 0-3 | 13-15 | 0-1 | Rest | 26 | 900 | 56 | 68 | 3.5-5.5 | 7.3 |
AlNiCo38/11 | 6-8 | 30-36 | 3-4 | 0-1 | 13-15 | 4-6 | Rest | 38 | 800 | 110 | 112 | 1.5-2.5 | 7.3 |
AlNiCo60/11 | 6-8 | 35-39 | 2-4 | 0-1 | 13-15 | 4-6 | Rest | 60 | 900 | 110 | 112 | 1.5-2.5 | 7.3 |
AlNiCo36/15 | 6-8 | 38-42 | 2-4 | 0-1 | 13-15 | 7-9 | Rest | 36 | 700 | 140 | 148 | 1.5-2.5 | 7.3 |
AlNiCo28/10* | 6-8 | 24-34 | 3-6 | 0-1 | 13-19 | 5-9 | Rest | 28 | 750 | 104 | 105 | 1.5-2.5 | 7.3 |
AlNiCo44/14* | 6-8 | 35-39 | 2-4 | 0-1 | 13-15 | 7-9 | Rest | 44 | 800 | 136 | 140 | 1.5-2.5 | 7.3 |
AlNiCo72/11** | 6-8 | 34-36 | 2-4 | 0-1 | 13-15 | 7-9 | Rest | 72 | 1050 | 112 | 114 | 1.5-2.5 | 7.3 |
AlNiCo80/12** | 6-8 | 34-42 | 2-4 | 0-1 | 13-15 | 7-9 | Rest | 80 | 1050 | 120 | 122 | 1.5-2.5 | 7.3 |
Physical Properties
Alloy | L/D | Temperature coefficient αBr/%.K-1 |
LNG40 | 3 | -0.016 |
4 | -0.016 |
8 | -0.022 |
LNGT28 | 3.6 | -0.02 |
8 | -0.032 |
LNGT32 | 2 | -0.001 |
3 | -0.005 |
6 | -0.007 |
Curie temperature ℃ | 850-890 |
Maximum working temperature ℃ | 550 |
Density g/cm-3 | 7.3 |
Hardness HRC | 45-60 |
Available Products and Specifications
Rod, Bar, Wire and Forgings | GB/T17951-2000 |
Plate, Sheet and Strip | GB/T17951-2000 |
Pipe and Tube | GB/T17951-2000 |
Welding Product | – |
Others | – |
Features
AlNiCo cast permanent magnetic alloy is one of the most important permanent materials with excellent permanent magnetic properties and temperature stability.
Applications
They are widely applied for producing transducers, mini motors, moment appliances, flowmeters, and precision instruments.