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SINTERED ALNICO PROPERTIES
Typical Values at 20oC
| |
ALNICO GRADE |
Magnetic Properties
|
2
|
5
|
6
|
8B
|
8H
|
8NO
|
Maximum Energy Product (BHmax.)
|
MGOe
|
1.40
|
3.75
|
3.00
|
5.00
|
5.00
|
2.40
|
kJ/m3
|
11.1
|
29.8
|
23.9
|
39.8
|
39.8
|
19.1
|
Residual Induction (Br)
|
Gauss
|
6600
|
10800
|
9400
|
8000
|
7000
|
5500
|
mT
|
660
|
1080
|
940
|
800
|
700
|
550
|
Required Magnetizing Field
|
Oersteds
|
2000
|
3000
|
3000
|
6000
|
6000
|
6000
|
kA/m
|
160
|
240
|
240
|
480
|
480
|
480
|
Coercive Force (Hc)
|
Oersteds
|
550
|
600
|
780
|
1700
|
1850
|
1475
|
kA/m
|
44
|
48
|
62
|
135
|
147
|
117
|
Recoil Permeability (µr)
|
G/Oe
|
5.6
|
5.2
|
5.4
|
1.8
|
1.9
|
2.6
|
mT/(kA/m)
|
7.0
|
6.5
|
6.8
|
2.3
|
2.4
|
3.3
|
Permeance Coefficient at BH Max.
|
G/Oe
|
12.0
|
17.0
|
12.0
|
4.5
|
3.4
|
3.8
|
mT/(kA/m)
|
15.0
|
21.5
|
15.0
|
5.5
|
4.3
|
4.7
|
Induction @ Max. Energy Product
|
Gauss
|
4100
|
8000
|
6000
|
4750
|
4100
|
3000
|
mT
|
410
|
800
|
600
|
475
|
410
|
300
|
Curie Temperature (Tc)
|
ºC
|
810
|
900
|
860
|
860
|
860
|
860
|
Reversible Temperature Coefficients
|
Induction (Br)
|
0.02
|
0.02
|
0.02
|
0.02
|
0.02
|
0.02
|
Material Properties
|
2
|
5
|
6
|
8B
|
8H
|
8NO
|
Density
|
Lbs/in.3
|
0.247
|
0.253
|
0.250
|
0.252
|
0.252
|
0.252
|
g/cc
|
6.84
|
7.00
|
6.92
|
6.98
|
6.98
|
6.98
|
Electrical Resistivity at 25ºC
|
µOhms • cm per cm2
|
68
|
50
|
50
|
53
|
53
|
53
|
Tensile Strength
|
psi
|
65000
|
50000
|
55000
|
55000
|
50000
|
50000
|
N/mm2
|
450
|
350
|
380
|
380
|
350
|
350
|
Transverse Modulus of Rupture
|
psi
|
70000
|
60000
|
110000
|
55000
|
50000
|
50000
|
N/mm2
|
480
|
415
|
760
|
380
|
350
|
350
|
Coefficient of Thermal Expansion
|
per ºC x 106
|
12.4
|
11.3
|
11.3
|
11.6
|
11.6
|
11.6
|
Rockwell Hardness
|
RC
|
51
|
52
|
53
|
56
|
56
|
56
|
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