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SmCo  
Materials from LIHE include both Rare-Earth Magnets and Non- Rare-earth Magnets. Rare-Earth Magnets are of higher performance while Non- Rare-Earth Magnets are of cheaper price. LIHE always tries to provide its customers appropriate materials according to their actual requirements.
As previously stated, Rare-Earth Magnets are of higher performance than Non-Rare-Earth Magnets. bonded smco powder
Nd-Fe-B magnets (both Sintered and Bonded) and Sm-Co magnets (Sintered) are the major Rare-Earth magnetic materials of LIHE.
Although these two magnets can be substituted by each other where operating temperature is less than 80。C, there still exits some feature differences. The price of Nd-Fe-B magnets is relatively lower. The (BH) max of Nd-Fe-B magnets can reach to 48MGOe, which is higher than that of Sm-Co magnets. However, Sm-Co magnets have special advantages also. Besides its better corrosion & oxidation resistance, Sm-Co magnets have better temperature stability. Sm-Co magnets can be operated at higher temperature up to 300oC, while Nd-Fe-B magnets can not stand temperature over 180oC. bonded smco powders
bonded smco powders

Specifications for SmCo

Characteristics

aterial Grade


Residual Fulx

Br


Coer-
cive Force

Hcb


Intrinsic
Coercive Force

Hcj


Max. Energy

Product

(BH)max


Curie Temp

Tc


Density

ρ


Temp. Coeff-
icient
△Bd/Bd


Thermal
Expansion
coefficient


Vickers
Hardness

 

Tesal
(kGs)

KA/m
(kOe)

KA/m
(kOe)

kJ/m3
(MGOe)

(℃)

g/cm3

(%℃)

C⊥
(1℃)

C∥
(1℃)

Hv

1:5
SmCo5

SM~18

0.80~0.90
(8.0~9.0)

621
~700
(7.8
~8.8)

≥1990
(≥25.0)

127~159
(16.0
~20.0)

750
~800

8.2~8.4

-0.05

13×10-6

6×10-6

450~500

SM~20

0.90~0.95
(9.0~9.5)

676
~740
(8.5
~9.3)

≥1432
(≥18.0)

151~167
(19~21)

750
~800

8.2~8.4

-0.05

13×10-6

6×10-6

450~500

SM~22

0.95~1.00
(9.5~10.0)

716
~756
(9.0
~9.5)

≥1194
(≥15.0)

167~183
(21~23)

750
~800

8.2~8.4

-0.05

13×10-6

6×10-6

450~500

2:17
Sm2 (Co,Cu,
Fe,Zr) 17

SM~18T

0.85~0.95
(8.5~9.5)

636
~716
(8.0
~9.0)

≥1592
(≥20.0)

127~159
(16.0
~20.0)

850
~900

8.3~8.5

-0.01

11×10-6

8×10-6

500~600

SM~22T

0.95~1.00
(9.5~10.0)

676
~756
(8.5
~9.5)

≥1592
(≥20.0)

159~191
(20.0
~24.0)

850
~900

8.3~8.5

-0.01

11×10-6

8×10-6

500~600

SM~22L

0.95~1.00
(9.5~10.0)

477
~557
(6.0
~7.0)

493~716
(6.2~9.0)

159~191
(20.0
~24.0)

800
~850

8.3~8.5

-0.03

11×10-6

8×10-6

500~600

SM~22H

0.95~1.00
(9.5~10.0)

557
~756
(7.0
~9.5)

≥637
(≥8.0)

159~191
(20.0
~24.0)

800
~850

8.3~8.5

-0.03

11×10-6

8×10-6

500~600

SM~22U

0.95~1.00
(9.5~10.0)

716
~796
(9.0
~10.0)

≥1990
(≥25.0)

159~191
(20.0
~24.0)

800
~850

8.3~8.5

-0.03

11×10-6

8×10-6

500~600

SM~26L

1.00~1.08
(10.0
~10.8)

477
~557
(6.0
~7.0)

493~716
(6.2~9.0)

191~223
(24.0
~28.0)

800
~850

8.3~8.5

-0.03

11×10-6

8×10-6

500~600

SM~26H

1.00~1.08
(10.0
~10.8)

557
~812
(7.0
~10.2)

≥637
(≥8.0)

191~223
(24.0~28.0)

800
~850

8.3~8.5

-0.03

11×10-6

8×10-6

500~600

SM~26U

1.00~1.08
(10.0
~10.8)

756
~836
(9.5
~10.5)

≥1990
(≥25.0)

191~223
(24.0
~28.0)

800
~850

8.3~8.5

-0.03

11×10-6

8×10-6

500~600

SM~30L

1.08~1.12
(10.8
~11.2)

477
~557
(6.0
~7.0)

493~716
(6.2~9.0)

223~247
(28.0
~31.0)

800
~850

8.3~8.5

-0.03

11×10-6

8×10-6

500~600

SM~30H

1.08~1.12
(10.8
~11.2)

637
~836
(8.0
~10.5)

≥637
(≥8.0)

223~247
(28.0
~31.0)

800
~850

8.3~8.5

-0.03

11×10-6

8×10-6

500~600

SM~30U

1.08~1.12
(10.8
~11.2)

796
~859
(10.0
~10.8)

≥1990
(≥25.0)

223~247
(28.0
~31.0)

800
~850

8.3~8.5

-0.03

11×10-6

8×10-6

500~600

SM~32

≥1.12
(≥11.2)

≥557
(≥7.0)

≥637
(≥8.0)

≥239
(≥30.0)

800
~850

8.3~8.5

-0.03

11×10-6

8×10-6

500~600




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