Technology
Alnico Magnets - Magnetic Properties
Alloy Grade |
Max.Emergy Product Bd X Hd |
Residual Induction Br |
Coercive Force Hc
|
Working Poin
bd ..............hd |
Average Recoil Permeability |
Maximum Magnetising Force |
||||||
MGOe |
KJ/m3 |
G |
mT |
Oe |
KA/m |
G |
mT |
Oe |
KA/m |
AT/cm |
||
Alnico 3 |
1.4 |
11.14 |
6300 |
630 |
600 |
47.0 |
4000 |
400 |
355 |
28.0 |
4.5 |
2500 |
Alnico 5 |
5.50 |
43.8 |
12500 |
1250 |
640 |
51.0 |
9750 |
975 |
565 |
45.0 |
3.5 |
2500 |
Alnico 6 |
4.50 |
35.8 |
11500 |
1150 |
720 |
57.3 |
8200 |
820 |
550 |
44.0 |
4.0 |
2500 |
Alnico 8 (Isotropic) |
2.8 |
22.2 |
6800 |
680 |
1350 |
107.0 |
- |
- |
- |
- |
- |
- |
Chemical Composition & Physical Properties
Chemical Composition weight % |
Physical Properties |
||||||||||||
Co |
Ni |
Al |
Cu |
Ti |
Si |
Fe |
Density gms. per cm3 |
Hardness Rock Well 'C' |
Resistivity at 25 0C |
Curie pt.0C |
Mea ncoefficient of Thermal Expansion per 0Cx106 |
Reversible Variation in %of BH max per 0C |
|
Alnico 3 |
4.0 |
25.5 |
11.5 |
4.5 |
- |
- |
54.5 |
7.00 |
52 |
62 |
780 |
12.0 |
-0.013 |
Alnico 5 |
24.0 |
14.0 |
8.0 |
3 |
- |
- |
51.0 |
7.30 |
50 |
50 |
870 |
11.3 |
-0.014 |
Alnico 6 |
24.0 |
15.0 |
8.0 |
3 |
0.5 |
- |
49.5 |
7.35 |
50 |
55 |
860 |
11.4 |
-0.014 |
Alnico8 (Isotropic) |
34.0 |
14.0 |
8.0 |
4 |
7 |
- |
33.8 |
7.25 |
56 |
50 |
800 |
11.0 |
-0.014 |