Chongqing Great Wall Technology Co., Ltd. is one of the leading manufacturers and suppliers of samarium cobalt disc magnet in China, also supports customized service. Welcome to wholesale high quality samarium cobalt disc magnet for sale here from our factory.
Samarium Cobalt (or SmCo) magnets are strong permanent magnets made of an alloy of samarium and cobalt. They are known for their high magnetic strength, exceptional temperature resistance, and reliable performance without oxidation protection. As a result, they are more suitable for certain applications than Neodymium magnets.
They are commonly used in high performance motors, magnetic couplings and magnetic separators. These are brittle magnets and are prone to cracking and chipping. Samarium magnets can be used for high temperature applications where neodymium will not work.
Samarium cobalt disc magnets are powerful rare earth magnets that offer superior resistance to heat and corrosion. A samarium cobalt magnet can perform at temperatures of up to 300°C, or 662°F. Their resistance to corrosion makes them a great choice for use in highly corrosive environments, such as on boats where magnets are exposed to saltwater. Samarium cobalt magnets offer superior magnetic strength in comparison to ceramic and AlNiCo magnets, and are commonly used in high-tech applications such as electronics, computers, and switches. They are also often used in automotive “under-the-hood” applications, commercial and military aircraft, and many other intense applications.
Features
- Samarium cobalt magnets have high magnetic properties;
- Samarium cobalt magnets are with good thermal stability;
- Samarium cobalt magnets are resistant to corrosion;
- Samarium cobalt magnets are resistant to demagnetization;
- Samarium cobalt magnets are hard and brittle and may chip or break if dropped.
Physical Properties
|
Parameter |
Unit |
SmCo5 |
Sm2Co17 |
|
Density |
g/m³ |
8.2 ~ 8.4 |
8.3 ~ 8.5 |
|
Curie Temperature |
℃ |
700 ~ 750 |
800 ~ 850 |
|
Max Working Temperature |
℃ |
250 |
350 |
|
Temperature Coefficient Of Br |
%/℃ |
-0.05 |
-0.03 |
|
Vickers Hardness |
HV |
450 ~ 500 |
550 ~600 |
|
Electronic Ressistivity |
Ω.cm 10(-5) |
5 ~ 6 x 10(-5） |
8 ~ 9 x 10(-5） |
|
Thermal Conductivity |
W/mK |
12 |
13 |
Magnetic Properties of Sintered Samarium Cobalt Magnets
|
SmCo |
|||||||||||||
|
Magnetic Property Parameters of Sintered Sm2Co17 |
|||||||||||||
|
Grade |
Br |
Hcb |
Hcj |
(BH)max |
Tc |
Tw |
T.C a(Br) |
T.C a(Hcj) |
|||||
|
Max |
Typ |
Min |
Min |
Min |
Max |
Typ |
Min |
℃ |
℃ |
%|℃ |
%|℃ |
||
|
T |
T |
T |
KA/m |
KA/m |
KJ/m³ |
||||||||
|
KGs |
KGs |
KGs |
KOe |
KOe |
MGOe |
||||||||
|
RE2Co17 175/199 |
SmCo24H |
1.03 |
0.99 |
0.96 |
724 |
1990 |
199 |
183 |
175 |
820 |
350 |
-0.03 |
-0.2 |
|
10.3 |
9.9 |
9.6 |
9.1 |
25 |
25 |
23 |
22 |
||||||
|
RE2Co17 175/199 |
SmCo24 |
1.03 |
0.99 |
0.96 |
724 |
1592 |
199 |
183 |
175 |
820 |
350 |
-0.03 |
-0.2 |
|
10.3 |
9.9 |
9.6 |
9.1 |
20 |
25 |
23 |
22 |
||||||
|
RE2Co17 191/199 |
SmCo26H |
1.06 |
1.04 |
1.01 |
733 |
1990 |
215 |
199 |
191 |
820 |
350 |
-0.03 |
-0.2 |
|
10.6 |
10.4 |
10.1 |
9.2 |
25 |
27 |
25 |
24 |
||||||
|
RE2Co17 191/159 |
SmCo26 |
1.06 |
1.04 |
1.01 |
733 |
1592 |
215 |
199 |
191 |
820 |
350 |
-0.03 |
-0.2 |
|
10.6 |
10.4 |
10.1 |
9.2 |
20 |
27 |
25 |
24 |
||||||
|
RE2Co17 191/80 |
SmCo26M |
1.06 |
1.04 |
1.01 |
637-796 |
796-1273 |
215 |
199 |
191 |
820 |
350 |
-0.03 |
-0.2 |
|
10.6 |
10.4 |
10.1 |
8-10 |
10-16 |
27 |
25 |
24 |
||||||
|
RE2Co17 191/44 |
SmCo26L |
1.06 |
1.04 |
1.01 |
438-716 |
478-796 |
215 |
199 |
191 |
820 |
350 |
-0.03 |
-0.2 |
|
10.6 |
10.4 |
10.1 |
5.5-9 |
6-16 |
27 |
25 |
24 |
||||||
|
RE2Co17 207/199 |
SmCo28H |
1.09 |
1.07 |
1.04 |
749 |
1990 |
231 |
215 |
207 |
820 |
350 |
-0.03 |
-0.2 |
|
10.9 |
10.7 |
10.4 |
9.4 |
25 |
29 |
27 |
26 |
||||||
|
RE2Co17 207/159 |
SmCo28 |
1.09 |
1.07 |
1.04 |
749 |
1592 |
231 |
215 |
207 |
820 |
350 |
-0.03 |
-0.2 |
|
10.9 |
10.7 |
10.4 |
9.4 |
20 |
29 |
27 |
26 |
||||||
|
RE2Co17 207/80 |
SmCo28M |
1.09 |
1.07 |
1.04 |
660-804 |
796-1273 |
231 |
215 |
207 |
820 |
350 |
-0.03 |
-0.2 |
|
10.9 |
10.7 |
10.4 |
8.3-10.1 |
44485 |
29 |
27 |
26 |
||||||
|
RE2Co17 207/44 |
SmCo28L |
1.09 |
1.07 |
1.04 |
438-716 |
478-796 |
231 |
215 |
207 |
820 |
350 |
-0.03 |
-0.2 |
|
10.9 |
10.7 |
10.4 |
5.5-9 |
6-16 |
29 |
27 |
26 |
||||||
|
RE2Co17 222/199 |
SmCo30H |
1.11 |
1.1 |
1.08 |
773 |
1990 |
247 |
231 |
222 |
820 |
350 |
-0.03 |
-0.2 |
|
11.1 |
11 |
10.8 |
9.7 |
25 |
31 |
29 |
28 |
||||||
|
RE2Co17 222/159 |
SmCo30 |
1.11 |
1.1 |
1.08 |
773 |
1592 |
247 |
231 |
222 |
820 |
350 |
-0.03 |
-0.2 |
|
11.1 |
11 |
10.8 |
9.7 |
20 |
31 |
29 |
28 |
||||||
|
RE2Co17 222/80 |
SmCo30M |
1.11 |
1.1 |
1.08 |
668-820 |
796-1273 |
247 |
231 |
222 |
820 |
350 |
-0.03 |
-0.2 |
|
11.1 |
11 |
10.8 |
8.4-10.3 |
44485 |
31 |
29 |
28 |
||||||
|
RE2Co17 222/44 |
SmCo30L |
1.12 |
1.1 |
1.08 |
438-757 |
478-796 |
247 |
231 |
222 |
820 |
350 |
-0.03 |
-0.2 |
|
11.2 |
11 |
10.8 |
5.5-9.5 |
6-10 |
31 |
29 |
28 |
||||||
|
RE2Co17 230/199 |
SmCo32H |
1.14 |
1.12 |
1.1 |
796 |
1990 |
263 |
239 |
230 |
820 |
350 |
-0.03 |
-0.2 |
|
11.4 |
11.2 |
11 |
10 |
25 |
33 |
30 |
29 |
||||||
|
RE2Co17 230/127 |
SmCo32H |
1.14 |
1.12 |
1.1 |
796 |
1274 |
263 |
239 |
230 |
820 |
350 |
-0.03 |
-0.2 |
|
11.4 |
11.2 |
11 |
10 |
16 |
33 |
30 |
29 |
||||||
|
RE2Co17 230/80 |
SmCo32M |
1.14 |
1.12 |
1.1 |
676-844 |
796-1273 |
263 |
239 |
230 |
820 |
350 |
-0.03 |
-0.2 |
|
11.4 |
11.2 |
11 |
8.5-10.6 |
10-16 |
33 |
30 |
29 |
||||||
|
RE2Co17 230/44 |
SmCo32L |
1.14 |
1.12 |
1.1 |
438-796 |
478-796 |
263 |
239 |
230 |
820 |
350 |
-0.03 |
-0.2 |
|
11.4 |
11.2 |
11 |
5.5-10 |
6-10 |
33 |
30 |
29 |
||||||
|
Magnetic Property Parameters of Sintered SmCo5 |
|||||||||||||
|
Grade |
Br |
Hcb |
Hcj |
(BH)max |
Tc |
Tw |
T.C a(Br) |
T.C a(Hcj) |
|||||
|
Max |
Typ |
Min |
Min |
Min |
Max |
Typ |
Min |
℃ |
℃ |
%|℃ |
%|℃ |
||
|
T |
T |
T |
KA/m |
KA/m |
KJ/m³ |
||||||||
|
KGs |
KGs |
KGs |
KOe |
KOe |
MGOe |
||||||||
|
RECo5 119/127 |
SmCo16 |
0.85 |
0.83 |
0.81 |
620 |
1274 |
143 |
127 |
119 |
750 |
250 |
-0.05 |
-0.3 |
|
8.5 |
8.3 |
8.1 |
7.8 |
16 |
18 |
16 |
15 |
||||||
|
RECo5 119/127 |
SmCo18 |
0.89 |
0.87 |
0.84 |
645 |
1274 |
159 |
143 |
135 |
750 |
250 |
-0.05 |
-0.3 |
|
8.9 |
8.7 |
8.4 |
8.1 |
16 |
20 |
18 |
17 |
||||||
|
RECo5 119/127 |
SmCo20 |
0.94 |
0.92 |
0.89 |
680 |
1274 |
175 |
159 |
151 |
750 |
250 |
-0.05 |
-0.3 |
|
9.4 |
9.2 |
8.9 |
8.5 |
16 |
22 |
20 |
19 |
||||||
|
RECo5 119/127 |
SmCo22 |
0.98 |
0.95 |
0.93 |
710 |
1274 |
183 |
167 |
159 |
750 |
250 |
-0.05 |
-0.3 |
|
9.8 |
9.5 |
9.3 |
8.9 |
16 |
23 |
21 |
20 |
||||||
|
RECo5 119/127 |
SmCo24 |
1.01 |
0.98 |
0.96 |
730 |
1194 |
199 |
193 |
175 |
750 |
250 |
-0.05 |
-0.3 |
|
10.1 |
9.8 |
9.6 |
9.2 |
15 |
25 |
23 |
22 |
||||||
Specification of SmCo Disc Magnet
|
Outer diameter(mm) |
Tolerance(mm) |
Cylindricity(mm) |
|
D≤10 |
±0.03 |
0.03 |
|
10<D≤30 |
±0.04 |
0.03 |
|
30<D≤50 |
±0.05 |
0.05 |
|
D>50 |
±0.06 |
0.06 |
Manufacturing Process
Compounding → smelting → milling → compression → sintering → magnetism testing → grinding → cutting → finished products.
Coating Types and Processing Accuracy
Samarium-cobalt magnets have good corrosion resistance, they can be used at room temperature without coating. Also it can be customized according to the application and customer’s requirements.
|
Surface |
Method |
Minimum layer thickness for corrosion protection |
Color |
Resistance |
TW(℃) |
Application |
|
Epoxy |
Automatic spray coating |
>10μm |
Black |
Humid atmosphere, spray test, toxic gas test |
<200 |
Linear motors |
|
Nickel |
Galvanic |
>10μm |
Silver |
Humid atmosphere, solvents, cooling lubricants |
<200 |
Linear motos, small-sized motors |
|
NiCuNi |
Galvanic |
>10μm |
Silver |
Humid atmosphere, solvents, cooling lubricants |
<200 |
Linear motos, small-sized motors |
|
Tin |
Galvanic |
>15μm |
Silver Bright |
Humid atmosphere, solvents |
<160 |
Motors, sensors |
Applications
1. High temperature Motors and Generators
2. Military applications
3. Automotive (sensors)
4. Aerospace (sensors)
5. Magnetic pump couplings
6. Oil drilling applications
7. Cryogenic applications, etc.
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