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SAMARIUM COBALT MAGNETS
Samarium Cobalt (SmCo) magnets offer designers a tremendous combination of extremely high magnetic properties, outstanding thermal stability and excellent corrosion resistance. As part of the rare earth group of permanent magnets, Samarium Cobalt (SmCo) magnets typically fall into two families of materials. They include rare earth SmCo5 and Sm2Co17, and are commonly referred to as 1:5 and 2:17 materials.
Samarium Cobalt magnets are highly resistant to corrosion and require no special surface treatment. This makes Samarium Cobalt an excellent choice for compact designs where high temperature environments may be present.
|
Grade
|
Max. Energy Product
|
Remanence
|
Coercive Force |
Rev. Temp. Coeff. |
Working Temp. |
Density |
||||||
|
(BH)max
|
Br |
Hc |
Hci |
Bd |
Hd |
Tw |
D
|
|||||
|
MGOe
|
kJ/m3
|
kG
|
mT
|
kOe
|
kA/m
|
kOe
|
kA/m
|
%/°C
|
%/°C
|
°C
|
g/cm3
|
|
|
SmCo5
16A
|
16.0
|
130.0
|
8.2
|
820
|
7.5
|
600
|
>16.0
|
>1270
|
-0.05
|
0.25
|
250
|
8.4
|
|
SmCo5
16B
|
16.0
|
130.0
|
8.2
|
820
|
7.5
|
600
|
>20.0
|
>1590
|
-0.05
|
0.25
|
250
|
8.4
|
|
SmCo5
18A
|
18.0
|
146.3
|
8.7
|
870
|
8.2
|
656
|
>16.0
|
>1272
|
-0.05
|
0.25
|
250
|
8.4
|
|
SmCo5
18B
|
18.0
|
146.3
|
8.7
|
870
|
8.2
|
656
|
>20.0
|
>1590
|
-0.05
|
0.25
|
250
|
8.4
|
|
SmCo5 20A
|
20.0
|
162.5
|
9.0
|
900
|
8.6
|
690
|
>16.0
|
>1272
|
-0.05
|
0.25
|
250
|
8.4
|
|
SmCo5
20B
|
20.0
|
162.5
|
9.0
|
900
|
8.6
|
690
|
>20.0
|
>1590
|
-0.05
|
0.25
|
250
|
8.4
|
|
SmCo5
22A
|
22.0
|
178.8
|
9.5
|
950
|
9.1
|
728
|
>16.0
|
>1272
|
-0.05
|
0.25
|
250
|
8.4
|
|
SmCo5
22B
|
22.0
|
178.8
|
9.5
|
950
|
9.1
|
728
|
>20.0
|
>1590
|
-0.05
|
0.25
|
250
|
8.4
|
|
Sm2Co17
24
|
24.0
|
195.0
|
10.0
|
1000
|
9.5
|
760
|
>20.0
|
>1590
|
-0.03
|
0.23
|
300
|
8.3
|
|
Sm2Co17
26A
|
26.0
|
211.3
|
10.6
|
1060
|
9.8
|
784
|
>16.0
|
>1272
|
-0.03
|
0.23
|
300
|
8.3
|
|
Sm2Co17
26B
|
26.0
|
211.3
|
10.6
|
1060
|
9.8
|
784
|
>20.0
|
>1590
|
-0.03
|
0.23
|
300
|
8.3
|
|
Sm2Co17
26H
|
26.0
|
211.3
|
10.6
|
1060
|
9.8
|
784
|
>26.0
|
>2067
|
-0.03
|
0.23
|
300
|
8.3
|
|
28.0
|
227.5
|
10.9
|
1090
|
10.0
|
800
|
>16.0
|
>1272
|
-0.03
|
0.23
|
300
|
8.3
|
|
|
Sm2Co17
28B
|
28.0
|
227.5
|
10.9
|
1090
|
10.0
|
800
|
>20.0
|
>1590
|
-0.03
|
0.23
|
300
|
8.3
|
|
Sm2Co17
28H
|
28.0
|
227.5
|
10.9
|
1090
|
10.0
|
800
|
>26.0
|
>2067
|
-0.03
|
0.23
|
300
|
8.3
|
|
Sm2Co17
30A
|
30.0
|
243.8
|
11.0
|
1100
|
10.2
|
816
|
>16.0
|
>1272
|
-0.03
|
0.23
|
300
|
8.3
|
|
Sm2Co17
30B
|
30.0
|
243.8
|
11.2
|
1120
|
10.2
|
816
|
>20.0
|
>1590
|
-0.03
|
0.23
|
300
|
8.3
|
| Sm2Co17 32 | 31.0 | 251.8 | 11.5 | 1150 | 10.0 | 800 | >15.0 | >1192 | -0.03 | 0.23 | 300 | 8.3 |
| Sm2Co17 25H | 25.0 | 203.2 | 10.5 | 1050 | 9.7 | 776 | >35.0 | >2782 | -0.03 | 0.23 | 375 | 8.3 |
Physical
and Manufacturing Characteristics
Hardness |
HV 10 |
Compression Strength |
300 - 900 N/mm2 |
Bending Strength |
120 N/mm2 |
Modulus |
1.2-2.0x104 N/mm3 |
Electrical Resistance at 20°C |
>0.5 ohm-cm |
Specific Heat Capacity |
370 J/(kg.C) |
1. The minimum dimension is 0.079" Diameter. |
2. All shapes and properties can be supplied to meet customers' requirements. |
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