Sintered Neodymium

ABOUT SINTERED NEODYMIUM

Driven by the high cost of samarium cobalt magnets, the NdFeB Compound was first discovered in 1982. Neodymium magnets are the strongest type of permanent magnet commercially available, today.  Yunsheng sells only patented, Hitachi-licensed sintered neodymium magnets. Neodymium has excellent characteristics: it has very high remanence and coercivity.   It is possible to manufacture in a variety of shapes including radially-oriented magnets.  Previously, at higher temperatures, only samarium cobalt was able to meet certain requirements.  With the development of modern neodymium grades, some high temperature grades are able to exceed acceptable samarium cobalt temperatures.   However, for most high temperature applications, samarium cobalt is still used based on a lower cost.   Nevertheless, Neodymium is still one of the most widely used magnetic materials, today, because of its versatility, strong magnetic capability, and small relative size.

PROCESS control

A powder metallurgy process is used to create sintered neodymium magnets.  As is true of other magnets, it should not be used as a structural component.   Neodymium is prone to corrosion, requiring an outer coating or plating.   Typically, a nickel-copper-nickel or epoxy coating is the plating of choice.  Other coatings are available, if required.   As the sintered neodymium is being manufactured in a Nitrogen-infused vacuum, any air particles (particularly oxygen) will allow the magnet to corrode from the inside out.   All Yunsheng products are held to particularly rigid quality standards to control oxygen content and porosity.   Patented processes are used to produce high quality magnets which are built to last.

TEMPERATURE CHARACTERISTICS

Neodymium magnets typically have a higher temperature coefficient than other rare earth magnets. When the magnet is exposed to a higher temperature, it may lose part or all of its magnetic performance.   Depending on the temperature and duration to which a magnet is subjected to, magnetic loss can be reversible.   The recommended maximum operating temperature, residual induction (Br), and the intrinsic coercive force (Hci) should be considered when determining which magnet grade to use for your application.   Contact your Yunsheng representative to find out the correct magnet for your application.

Applications include electronic, industrial, automotive, medical, as well as wind power solutions.​

PRECISION FORMING PROCESS

The traditional forming method starts with large blocks of material to be cut into smaller blocks.   In our proprietary process, the alloy material is first formed into a shape similar to the final product—thus reducing waste and cost.   These savings we pass onto you, the customer.  

Infographic of Precision Forming Process

DY-FREE and Low-HRE

dependence on HRE (Heavy Rare Earth) material used to control coercivity.  Yunsheng has made enormous strides since 2012 to completely eliminate Dysprosium and Terbium from almost half our material grades.  Today, Yunsheng already provides Dy-free grades up to 48H with significant HRE reductions (up to 70%) in our low-HRE grades.   As Yunsheng anticipates the growing demand in Neodymium magnets from the automotive and industrial sectors for higher efficiency and cost-down opportunities, our R&D team continues to develop and expand its sustainable practices programme for HRE-free grades.

MATERIAL GRADES

Grade

Remanence

Intrinsic Coercivity

Coercivity

Maximum Energy Product

Operating Temp.


Br

HcJ

HcB

(BH)max



T

kGs

kA/m

k0e

kA/m

k0e

kJ/m^3

MGOe

°C


Range

Minimum Value

Minimum Value

Range


N30

1.08~1.13

10.8~11.3

955

12

798

10.0

223~247

28~31

80

N33

1.13~1.17

11.3~11.7

955

12

836

10.5

247~271

31~34

80

N35

1.17~1.22

11.7~12.2

955

12

868

10.9

263~287

33~36

80

N38

1.22~1.26

12.2~12.6

955

12

899

11.3

287~310

36~39

80

N40

1.25~1.29

12.5~12.9

955

12

923

11.6

302~326

38~41

80

N42

1.28~1.32

12.8~13.2

955

12

923

11.6

318~342

40~43

80

N45

1.32~1.37

13.2~13.7

955

12

876

11.0

342~366

43~46

80

N48

1.37~1.42

13.7~14.2

955

12

892

11.2

366~390

46~49

80

N50

1.39~1.44

13.9~14.4

955

12

836

10.5

374~406

47~51

80

N52

1.42~1.47

14.2~14.7

876

11

836

10.5

390~422

49~53

70

N55

1.46~1.52

14.6~15.2

876

11

716

9.0

414~446

52~56

60

30M

1.08~1.13

10.8~11.3

1114

14

796

10.0

223~247

28~31

100

33M

1.13~1.17

11.3~11.7

1114

14

836

10.5

247~271

31~34

100

35M

1.17~1.22

11.7~12.2

1114

14

868

10.9

263~287

33~36

100

38M

1.22~1.26

12.2~12.6

1114

14

899

11.3

287~310

36~39

100

40M

1.25~1.29

12.5~12.9

1114

14

923

11.6

302~326

38~41

100

42M

1.28~1.32

12.8~13.2

1114

14

955

12.0

318~342

40~43

100

45M

1.32~1.37

13.2~13.7

1114

14

995

12.5

342~366

43~46

100

48M

1.37~1.42

13.9~14.2

1114

14

1019

12.8

358~390

45~49

100

50M

1.39~1.44

13.9~14.4

1114

14

1035

13.0

374~406

47~51

90

52M

1.42~1.47

14.2~14.7

1035

13

996

12.5

390~422

49~53

80

28H

1.04~1.09

10.4~10.9

1353

17

764

9.6

199~223

25~28

120

30H

1.08~1.13

10.8~11.3

1353

17

796

10.0

223~247

28~31

120

33H

1.13~1.17

11.3~11.7

1353

17

836

10.5

247~271

31~34

120

35H

1.17~1.22

11.7~12.2

1353

17

868

10.9

263~287

33~36

120

38H

1.22~1.26

12t.2~12.6

1353

17

899

11.3

287~310

36~39

120

40H

1.25~1.29

12.5~12.9

1353

17

923

11.6

302~326

38~41

120

42H

1.28~1.32

12.8~13.2

1353

17

955

12.0

318~342

40~43

120

45H

1.32~1.37

13.2~13.7

1353

17

971

12.2

342~366

43~46

120

48H

1.37~1.42

13.7~14.2

1353

17

1027

12.9

358~390

45~49

110

50H

1.39~1.44

13.9~14.4

1274

16

1035

13.0

374~406

47~51

100

28SH

1.04~1.09

10.4~10.9

1592

20

780

9.8

199~229

25~28

150

30SH

1.08~1.13

10.8~11.3

1592

20

804

10.1

223~247

28~31

150

33SH

1.13~1.17

11.3~11.7

1592

20

844

10.6

247~271

31~34

150

35SH

1.17~1.22

11.7~12.2

1592

20

876

11.0

263~287

33~36

150

38SH

1.22~1.26

12.2~12.6

1592

20

907

11.4

287~310

36~39

150

40SH

1.25~1.29

12.5~12.9

1592

20

939

11.8

302~326

38~41

150

42SH

1.28~1.32

12.8~13.2

1592

20

971

12.2

318~342

40~43

150

45SH

1.32~1.37

13.2~13.7

1592

20

979

12.3

342~366

43~46

140

48SH

1.37~1.42

13.7~14.2

1512

19

995

12.5

358~390

45~49

130

28UH

1.02~1.08

10.2~10.8

1990

25

764

9.6

207~231

26~29

180

30UH

1.08~1.13

10.8~11.3

1990

25

812

10.2

223~247

28~31

180

33UH

1.13~1.17

11.3~11.7

1990

25

852

10.7

247~271

31~34

180

35UH

1.17~1.22

11.7~12.2

1990

25

860

10.8

263~287

33~36

180

38UH

1.22~1.26

12.2~12.6

1990

25

876

11.0

287~310

36~39

180

40UH

1.25~1.29

12.5~12.9

1990

25

915

11.5

302~326

38~41

180

42UH

1.27~1.32

12.7~13.2

1990

25

971

12.2

310~342

39~43

170

45UH

1.32~1.37

13.2~13.7

1910

24

995

12.5

342~374

43~47

160

28EH

1.04~1.09

10.4~10.9

2388

30

780

9.8

207~231

26~29

200

30EH

1.08~1.13

10.8~11.3

2388

30

812

10.2

223~247

28~31

200

33EH

1.13~1.17

11.3~11.7

2388

30

820

10.3

247~271

31~34

200

35EH

1.17~1.22

11.7~12.2

2388

30

836

10.5

263~287

33~36

200

38EH

1.20~1.26

12.0~12.6

2388

30

915

11.5

279~310

35~39

200

40EH

1.25~1.29

12.5~12.9

2388

30

915

11.5

302~326

38~41

190

42EH

1.28~1.32

12.0~12.6

2308

29

971

12.2

310~342

39~43

180

28AH

1.02~1.09

10.2~10.9

2706

34

780

9.8

199~231

25~29

240

30AH

1.07~1.13

10.7~11.3

2706

34

812

10.2

215~247

27~31

240

33AH

1.11~1.17

11.1~11.7

2706

34

836

10.5

239~271

30~34

240

35AH

1.17~1.22

11.7~12.2

2706

34

883

11.1

263~287

33~36

230

38AH

1.22~1.26

12.2~12.6

2626

33

923

11.6

287~310

36~39

220

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