|
|
|
Alnico Properties
|
Magnetic
Properties
|
|
Grade |
Br
(Gauss) |
Hc
(Oersteds) |
Hci
(Oersteds) |
BHmax
(MGOe) |
Max.
Op. Temp.
(°C
) |
Relative
Cost by Wt. |
|
5
Cast
|
12,500
|
640
|
640
|
5.5
|
540
|
15
|
|
5-7
Cast
|
13,500
|
740
|
740
|
7.5
|
540
|
30
|
|
6
Cast
|
10,500
|
780
|
800
|
3.9
|
540
|
20
|
|
8
Cast
|
8,300
|
1,650
|
1,650
|
5.5
|
540
|
18
|
|
2
Sintered
|
6,600
|
550
|
550
|
1.4
|
540
|
8
|
|
5
Sintered
|
10,800
|
600
|
600
|
3.8
|
540
|
10
|
|
8
Sintered
|
7,000
|
1,900
|
1,900
|
5.0
|
540
|
10
|
|
|
|
Magnetic
Properties vs.Temperature
|
|
Material
and
Grade
|
Reversible
Temperature Cofficient of Br
(%
Change /°C) |
Curie
Temperature |
Max.
Service Temperature |
|
Near
Br
|
Near
Max. Energy Prod.
|
Near
Hc
|
°C
|
°F
|
°C
|
°F
|
|
Alnico
2
|
-0.03
|
-0.02
|
-0.02
|
810
|
1490
|
450
|
840
|
|
Alnico
5
|
-0.02
|
-0.015
|
-0.01
|
860
|
1580
|
525
|
975
|
|
Alnico
6
|
-0.02
|
-0.015
|
-0.03
|
860
|
1580
|
525
|
975
|
|
Alnico
8
|
-0.025
|
-0.01
|
-0.01
|
860
|
1580
|
550
|
1020
|
|
|
|
Physical
Properties
|
|
Material
and
Grade
|
Density |
Tensile
Strength psi |
Transverse
Modulus of Rupture |
Hardness
(Rockwell
C
) |
Coefficient
Of Thermal Expansion (Inches x10-6
Per°C) |
Electrical
Resistivity(Ohm-cm x 10-6
at 20
°C |
|
g/cm3
|
lbs/in3 |
|
Alnico
5, Cast
|
7.3
|
0.264
|
5,400
|
10,500
|
50
|
11.4
|
47
|
|
Alnico
6, Cast
|
7.3
|
0.265
|
23,000
|
45,000
|
50
|
11.4
|
50
|
|
Alnico
8, Cast
|
7.3
|
0.262
|
10,000
|
30,000
|
55
|
11
|
53
|
|
Alnico
2, Sintered
|
6.8
|
0.246
|
65,000
|
70,000
|
45
|
12.4
|
68
|
|
Alnico
5, Sintered
|
6.9
|
0.25
|
50,000
|
55,000
|
45
|
11.3
|
50
|
|
Alnico
8, Sintered
|
7
|
0.252
|
50,000
|
55,000
|
45
|
11
|
54
|
|
|
|
|
|
