Magnetic Properties |
|
Grade
|
Br
(Gauss)
|
Hc
(Oersteds)
|
Hci
(Oersteds)
|
BHmax
(MGOe)
|
Maximum
Operating Temperature (°C)
|
Temperture
Coefficient of Br
(%/°C)
|
Density
(Lb/in3)
|
|
B15S
|
7,950
|
6,100
|
10,500
|
14
|
150
|
-0.04
|
0.253
|
|
18
|
8,600
|
7,200
|
9,000
|
18
|
250
|
-0.04
|
0.300
|
|
22
|
9,850
|
8,750
|
12,000
|
22
|
250
|
-0.03
|
0.300
|
|
26
|
10,500
|
9,200
|
10,000
|
26
|
350
|
-0.03
|
0.300
|
|
26H
|
10,600
|
9,250
|
11,500
|
27
|
350
|
-0.03
|
0.300
|
|
26HS
|
10,600
|
9,800
|
18,000
|
27
|
380
|
-0.03
|
0.300
|
|
27H
|
11,000
|
10,300
|
26,000
|
28
|
350
|
-0.03
|
0.300
|
|
28
|
10,700
|
10,300
|
18,000
|
28
|
350
|
-0.03
|
0.300
|
|
32H
|
11,600
|
9,500
|
14,000
|
31
|
350
|
-0.03
|
0.300
|
|
Physical and Thermal Properties
|
| Description |
SmCo
1-5 Alloys |
SmCo
2-17 Alloys |
NdFeB |
|
Mechanical
Properties:
|
|
Modulus
of elasticy
|
23
x 106
psi
|
17
x 106
psi
|
22
x 106
psi
|
|
Ultimate
tensile strength
|
6
x 103
psi
|
5
x 103
psi
|
12
x 103
psi
|
|
Density
|
8.2
g/cc
|
8.4
g/cc
|
7.4
g/cc
|
|
Coefficient
of thermal expansion:
|
|
Perpendicular
to orientation
|
13
x 10-6/°C
|
11
x 10-6/°C
|
-4.8
x 10-6/°C
|
|
Parallel
to orientation
|
6
x 10-6/°C
|
8
x 10-6/°C
|
3.4
x 10-6/°C
|
|
Electrical
resistivity
|
5µ
ohm cm
|
86µ
ohm cm
|
160µ
ohm cm
|
|
Magnetic
Properties:
|
|
Curie
temperature
|
750°C
|
825°C
|
310°C
|
|
Reversible
temperature coefficient of residual induction (-100°C to + 100°C)
|
-0.043%
/ °C
|
-0.03%
/°C
|
-0.09
to -0.13%
/°C
|
|
Recoil
permeability
|
1.05
|
1.05
|
1.05
|
|
Max.
service temperature*
|
250°C
|
300°C
|
150°C
|
| * Maximum
Service Temperature depends on permeance coefficient of magnetic
circuit. Temperatures shown here are guidelines only |
|
|
