Samarium Cobalt SmCo Cylindrical Magnet
Samarium Cobalt (SmCo) Disc and Rod Magnets are extremely good performers.
Standard SmCo has a maximum operating temperature of up to +300 °C.
Minimum operating for SmCo is temperatures down to nearing -273 °C (cryogenic temperatures).
SmCo has extremely good temperature coefficients, only beaten by Alnico.
SmCo has very low variation in magnetic output with reasonable temperature change.
Sm1Co5 is regarded as corrosion resistant to water.
Sm2Co17 is regarded as having extremely good corrosion resistance.
SmCo can be nickel plated – this allows use for soldering to electrical circuits and also for maximum corrosion resistance for the Sm2Co17 alloys.
We can produce Samarium Cobalt discs and rods to any grade with a custom range of sizes, shapes and coating options. SmCo26 and SmCo26H are very popular grades (the H versions being capable of use at temperatures up to +350 degrees C).
Comes in different forms
Strong Magnetism force,comparable to Neodymium(slightly less)
Working temperature up to+200°C
Mature Technology
Samarium-cobalt(SmCo) magnets are the second most powerful magnets, with Neodymium being the most powerful. SmCo Countersunk Pot Magnets are also rare-earth metal based. The main components are samarium (Sm) and cobalt (Co), two elements that can be mixed in ratio 1:5 or 2:17. The final composition takes effect on magnetic and thermal parameters of magnets. A hard and brittle material, SmCo has high energy and is very resistant to external demagnetizing fields. Maximum working temperature is up to +250°C (SmCo5) and up to +300°C (Sm2Co17).
Custom shape Samarium Cobalt (SmCo) magnets can be expensive so are best supplied by special request.
Please contact us for a quotation or more information on SmCo disc magnets and SmCo rod magnets. SmCo Countersunk Ring Magnets
|
Materials
|
Grade
|
Remanent Flux Density
Br |
Coercivity
Hcb |
Intrinsic Coercivity
Hcj |
Max. Energy Product
(BH)max |
Curie Temperature
Tc |
Density
ρ |
Temperature Coefficient
△Bd/Bd |
Linear Expansion Coefficient
|
Webster
Hardness |
|
|
Unit
|
T
(kGs) |
kA/m
(kOe) |
kA/m
(kOe) |
kJ/m3
(MGOe) |
℃
|
g/cm3
|
%℃
|
C⊥
（1℃） |
C//
（1℃） |
Hv
|
|
|
1:5
SmCo5 |
HS-XGS18
|
0.8～0.9
(8.0～9.0) |
600～700
(7.5～8.8) |
≥1194
（≥15） |
143±16
（18±2） |
750～800
|
8.2～8.4
|
-0.05
|
13×10-6
|
6×10-6
|
450～500
|
|
HS-XGS18G
|
0.8～0.9
(8.0～9.0) |
600～700
(7.5～8.8) |
≥1592
（≥20） |
143±16
（18±2） |
750～800
|
8.2～8.4
|
-0.05
|
13×10-6
|
8×10-6
|
450～500
|
|
|
HS-XGS20
|
0.90～0.95
(9.0～9.5) |
676～740
(8.5～9.3) |
≥1194
（≥15） |
159±16
（20±2） |
750～800
|
8.2～8.4
|
-0.05
|
13×10-6
|
6×10-6
|
450～500
|
|
|
HS-XGS20G
|
0.90～0.95
(9.0～9.5) |
676～740
(8.5～9.3) |
≥1592
（≥20） |
159±16
（20±2） |
750～800
|
8.2～8.4
|
-0.05
|
13×10-6
|
8×10-6
|
450～500
|
|
|
HS-XGS22
|
0.94～1.00
(9.4～10.0) |
700～748
(8.8～9.4) |
≥1194
（≥15） |
175±16
（22±2） |
750～800
|
8.2～8.4
|
-0.05
|
13×10-6
|
6×10-6
|
450～500
|
|
|
HS-XGS22G
|
0.94～1.00
(9.4～10.0) |
700～748
(8.8～9.4) |
≥1592
（≥20） |
175±16
（22±2） |
750～800
|
8.2～8.4
|
-0.05
|
13×10-6
|
6×10-6
|
450～500
|
|
|
2:17
Sm2Co17 |
HS-XGS26L
|
1.0～1.08
(10.0～10.8) |
477～577
(6.0～7.0) |
493～716
(6.2～9.0) |
206±16
（26±2） |
800～850
|
8.3～8.5
|
-0.03
|
11×10-6
|
8×10-6
|
500～600
|
|
HS-XGS26H
|
1.0～1.08
(10.0～10.8) |
716～812
(9.0～10.2) |
≥1592
（≥20） |
206±16
（26±2） |
800～850
|
8.3～8.5
|
-0.03
|
11×10-6
|
8×10-6
|
500～600
|
|
|
HS-XGS26U
|
1.0～1.08
(10.0～10.8) |
716～812
(9.0～10.2) |
≥1990
（≥25） |
206±16
（26±2） |
800～850
|
8.3～8.5
|
-0.03
|
11×10-6
|
8×10-6
|
500～600
|
|
|
HS-XGS28L
|
1.06～1.10
(10.6～11.0) |
557～756
(7.0～9.5) |
636～955
(8.0～12.0) |
223±16
（28±2） |
800～850
|
8.3～8.5
|
-0.03
|
11×10-6
|
8×10-6
|
500～600
|
|
|
HS-XGS28H
|
1.06～1.10
(10.6～11.0) |
756～836
(9.5～10.5) |
≥1592
（≥20） |
223±16
（28±2） |
800～850
|
8.3～8.5
|
-0.03
|
11×10-6
|
8×10-6
|
500～600
|
|
|
HS-XGS28U
|
1.06～1.10
(10.6～11.0) |
756～836
(9.5～10.5) |
≥1990
（≥25） |
223±16
（28±2） |
800～850
|
8.3～8.5
|
-0.03
|
11×10-6
|
8×10-6
|
500～600
|
|
|
HS-XGS30L
|
1.08～1.15
(10.8～11.5) |
557～796
(7.0～10.0) |
636～955
(8.0～12.0) |
229±16
（30±2） |
800～850
|
8.3～8.5
|
-0.03
|
11×10-6
|
8×10-6
|
500～600
|
|
|
HS-XGS30U
|
1.08～1.12
(10.8～11.2) |
796～836
(10.0～10.5) |
≥1990
（≥25） |
239±16
（30±2） |
800～850
|
8.3～8.5
|
-0.03
|
11×10-6
|
8×10-6
|
500～600
|
|
|
HS-XGS32
|
≥1.12
（≥11.2） |
≥557
（≥7.0） |
≥637
（≥7.0） |
≥239
（≥30） |
800～850
|
8.3～8.5
|
-0.03
|
11×10-6
|
8×10-6
|
500～600
|
|
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