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

N28

1.04~1.09

10.4~10.9

960

12

788

9.9

207~231

26~29

80

N30

1.08~1.14

10.8~11.4

960

12

804

10.1

223~247

28~31

80​​​​

N33

1.14~1.19

11.4~11.9

960

12

843

10.6

247~271

31~34

80

N35

1.18~1.23

11.8~12.3

960

12

884

11.1

263~287

33~36

08

N38

1.23~1.28

12.3~12.8

960

12

915

11.5

287~310

36~39

80

N40

1.26~1.30

12.6~13.0

960

12

923

11.6

302~326

38~41

80

N42

1.29~1.33

12.9~13.3

960

12

923

11.6

318~342

40~43

80

N45

1.33~1.38

13.3~13.8

960

12

923

11.6

342~366

43~46

80

N48

1.38~1.42

13.8~14.2

960

12

923

11.6

366~390

46~49

80

N50

1.39~1.45

13.9~14.5

960

12

923

11.6

374~406

47~51

80

N52

1.43~1.48

14.3~14.8

960

12

875

11.0

390~422

49~53

80

N55

1.46~1.52

14.6~15.2

876

11

836

10.5

414~446

52~56

70

30M

1.08~1.14

10.8~11.4

1114

14

812

10.2

223~247

28~31

100

33M

1.14~1.19

11.4~11.9

1114

14

852

10.7

247~271

31~34

100

35M

1.18~1.23

11.8~12.3

1114

14

883

11.1

263~287

33~36

100

38M

1.23~1.28

12.3~12.8

1114

14

915

11.5

287~310

36~39

100

40M

1.26~1.30

12.6~13.0

1114

14

939

11.8

302~326

38~41

100

42M

1.29~1.33

12.9~13.3

1114

14

963

12.1

318~342

40~43

100

45M

1.33~1.38

13.3~13.8

1114

14

995

12.5

342~366

43~46

100

48M

1.37~1.42

13.7~14.2

1114

14

1019

12.8

358~390

45~49

100

50M

1.39~1.45

13.9~14.5

1114

14

1035

13.0

374~406

47~51

90

52M

1.42~1.48

14.2~14.8

1114

14

1035

13.0

390~422

49~53

90

55M

1.45~1.52

14.5~15.2

1035

13

971

12.2

414~446

52~56

80

28H

1.04~1.09

10.4~10.9

1353

17

788

9.9

207~231

26~29

120

30H

1.08~1.14

10.8~11.4

1353

17

820

10.3

223~247

28~31

120

33H

1.14~1.19

11.4~11.9

1353

17

860

10.8

247~271

31~34

120

35H

1.18~1.23

11.8~12.3

1353

17

884

11.1

263~287

33~36

120

38H

1.23~1.28

12.3~12.8

1353

17

923

11.6

287~310

36~39

120

40H

1.26~1.30

12.6~13.0

1353

17

947

11.9

302~326

38~41

120

42H

1.29~1.33

12.9~13.3

1353

17

971

12.2

318~342

40~43

120

45H

1.33~1.38

13.3~13.8

1353

17

1003

12.6

342~366

43~46

120

46H

1.35~1.40

13.5~14.0

1353

17

1019

12.8

350~374

44~47

120

47H

1.36~1.41

13.6~14.1

1353

17

1027

12.9

358~382

45~48

120

48H

1.37~1.42

13.7~14.2

1353

17

1035

13.0

358~390

45~49

110

50H

1.39~1.44

13.9~14.4

1353

17

1035

13.0

374~406

47~51

110

52H

1.42~1.47

14.2~14.7

1274

16

1035

13.0

390~422

49~53

100

28SH

1.04~1.09

10.4~10.9

1592

20

788

9.9

207~231

26~29

150

30SH

1.08~1.14

10.8~11.4

1592

20

820

10.3

223~247

28~31

150

33SH

1.14~1.19

11.4~11.9

1592

20

860

10.8

247~271

31~34

150

35SH

1.18~1.23

11.8~12.3

1592

20

884

11.1

263~287

33~36

150

38SH

1.23~1.28

12.3~12.8

1592

20

923

11.6

287~310

36~39

150

40SH

1.26~1.30

12.6~13.0

1592

20

947

11.9

302~326

38~41

150

42SH

1.29~1.33

12.9~13.3

1592

20

971

12.2

318~342

40~43

150

44SH

1.32~1.36

13.2~13.6

1592

20

995

12.5

334~358

42~45

150

45SH

1.33~1.38

13.3~13.8

1592

20

1003

12.6

342~366

43~46

150

46SH

1.35~1.40

13.5~14.0

1592

20

1019

12.8

350~374

44~47

150

48SH

1.37~1.42

13.7~14.2

1592

20

1035

13.0

358~390

45~49

150

50SH

1.39~1.44

13.9~14.4

1592

20

1035

13.0

374~406

47~51

150

52SH

1.42~1.47

14.2~14.7

1512

19

1035

13.0

390~422

49~53

140

28UH

1.04~1.09

10.4~10.9

1990

25

788

9.9

207~231

26~29

180

30UH

1.08~1.14

10.8~11.4

1990

25

820

10.3

223~247

28~31

180

33UH

1.14~1.19

11.4~11.9

1990

25

860

10.8

247~271

31~34

180

35UH

1.18~1.23

11.8~12.3

1990

25

884

11.1

263~287

33~36

180

38UH

1.23~1.28

12.3~12.8

1990

25

923

11.6

287~310

36~39

180

40UH

1.26~1.30

12.6~13.0

1990

25

947

11.9

302~326

38~41

180

42UH

1.29~1.33

12.9~13.3

1990

25

971

12.2

318~342

40~43

170

44UH

1.32~1.36

13.2~13.6

1990

25

995

12.5

334~358

42~45

170

45UH

1.33~1.38

13.3~13.8

1910

24

1003

12.6

342~366

43~46

160

28EH

1.05~1.09

10.5~10.9

2388

30

788

9.9

207~231

26~29

200

30EH

1.08~1.14

10.8~11.4

2388

30

820

10.3

223~247

28~31

200

33EH

1.14~1.19

11.4~11.9

2388

30

860

10.8

247~271

31~34

200

35EH

1.18~1.22

11.8~12.2

2388

30

884

11.1

263~287

33~36

200

38EH

1.22~1.27

12.2~12.7

2388

30

923

11.6

287~310

36~39

200

40EH

1.25~1.30

12.5~13.0

2388

30

947

11.9

302~326

38~41

190

42EH

1.28~1.33

12.8~13.3

2308

29

971

12.2

318~342

40~43

180

28AH

1.05~1.09

10.5~10.9

2786

35

796

10.0

207~231

26~29

240

30AH

1.08~1.14

10.8~11.4

2786

35

820

10.3

223~247

28~31

240

33AH

1.14~1.19

11.4~11.9

2786

35

860

10.8

247~271

31~34

240

35AH

1.18~1.22

11.8~12.2

2786

35

891

11.2

263~287

33~36

240

38AH

1.22~1.27

12.2~12.7

2706

34

923

11.6

287~310

36~39

230

G52SH

1.42~1.47

14.2~14.7

1592

20

1035

13.0

390~422

49~53

150​

G48UH

1.37~1.42

13.7~14.2

1990

25

1035

13.0

358~390

45~49

180

G50UH

1.39~1.44

13.9~14.4

1990

25

1035

13.0

374~406

47~51

180

G45EH

1.32~1.36

13.2~13.6

2388

30

1003

12.6

342~366

43~46

200

G40AH

1.25~1.29

12.5~12.9

2786

35

947

11.9

302~326

38~41

240

G42AH

1.28~1.32

12.8~13.2

2786

35

971

12.2

318~342

40~43

240

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430 North Canal Street Unit 2/3 
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TEL: (650) 827–7928
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