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NdFeB
Neodymium Iron Boron Magnet Materials

Sintered NdFeB Magnets

*Download: Catalogue of Sintered NdFeB Magnets  (960KB)

Sintered NdFeB magnets are the most powerful commercialized permanent magnets available today, with maximum energy product ranging from 26 MGOe to 55 MGOe. Nd-Fe-B is the third generation of permanent magnet developed in the 1980s. It has a combination of very high remanence and coercivity, and comes with a wide range of grades, sizes and shapes. With its excellent magnetic characteristics, abundant raw material and relatively low prices, Nd-Fe-B offers more flexibility in designing of new or replace the traditional magnet materials such as ceramic, Alnico and Sm-Co to achieve high efficiency, low cost and more compact devices.

Advantages of sintered Magnet

*Extreme strong Br Resident induction.
*Excellent demagnetization resistance capability.
*Good Price relative to its high magnetic properties.

Magnetic Properties of Sintered NdFeB Magnets

Item

Grade

Remanence;
 Br

Coercivity;
 HcB

Coercivity Force;
 HcJ

Max BH Product;
   (BH)max

Working
Temp.
°C

KGs

T

KOe

KA/m

KOe

KA/m

MGOe

KJ/m

Max.

Min.

Max.

Min.

Max

Min.

Max.

Min.

N

N40

13.2

12.6

1.32

1.26

≥10.5

≥836

>=12

>=954

42

38

334

289

≤80

N42

13.5

12.9

1.35

1.30

≥10.5

≥836

>=12

>=954

44

40

350

318

≤80

N45

13.8

13.2

1.38

1.32

≥10.5

≥836

>=12

>=954

46

42

366

334

≤80

N48

14.2

13.7

1.43

1.37

≥10.5

≥836

>=11

>=876

49

45

390

358

≤80

N50

14.5

14.0

1.45

1.40

≥10.5

≥836

>=11

>=876

51

47

406

374

<=80

N52

14.8

14.4

1.48

1.44

≥10.5

>=836

>=11

>=876

53

49

422

390

<=80

M

N38M

12.8

12.3

1.30

1.23

≥11.6

>=915

>=14

>=1114

40

36

318

287

<=100

N40M

13.2

12.6

1.32

1.26

≥11.8

>=939

>=14

>=1114

42

38

334

289

<=100

N42M

13.5

12.9

1.35

1.30

≥12.0

>=955

>=14

>=1114

44

40

350

318

<=100

N45M

13.8

13.2

1.38

1.32

≥12.5

>=994

>=14

>=1114

46

42

366

334

<=100

N48M

14.2

13.7

1.42

1.37

≥12.8

>=1018

>=14

>=1114

49

45

390

358

<=100

N50M

14.5

14.0

1.45

1.40

≥13.1

>=1042

>=11

>=1114

51

47

406

374

<=80

H

N35H

12.5

11.8

1.25

1.18

≥11.0

>=875

>=17

>=1353

37

33

295

263

<=120

N38H

12.8

12.3

1.30

1.23

≥11.6

>=915

>=17

>=1353

40

36

318

287

<=120

N41H

13.2

12.6

1.32

1.26

≥11.8

>=939

>=17

>=1274

42

38

334

302

<=120

N44H

13.7

13.0

1.37

1.30

≥12.1

>=963

>=16

>=1274

45

41

358

326

<=120

N46H

13.8

13.2

1.38

1.32

≥12.2

>=971

>=16

>=1274

47

43

374

342

<=120

N48H

14.2

13.7

1.42

1.37

≥12.7

>=1011

>=16

>=1274

49

45

390

358

<=120

SH

N35SH

12.5

11.8

1.25

1.18

≥11.0

>=876

>=20

>=1592

37

33

295

263

<=150

N39SH

13.0

12.3

1.30

1.23

≥11.6

>=923

>=20

>=1592

40

36

318

287

<=150

N42SH

13.2

12.9

1.32

1.26

>=11.8

>=939

>=20

>=1592

42

38

334

302

<=150

N44SH

13.7

13.0

1.37

1.30

>=12.1

>=963

>=20

>=1592

45

41

358

326

<=150

N46SH

13.8

13.4

1.38

1.34

>=12.5

>=965

>=20

>=1592

47

43

374

342

<=150

UH

N33UH

12.2

11.4

1.22

1.14

>=10.7

>=851

>=25

>=1990

35

31

279

2247

<=180

N35UH

12.5

11.8

1.25

1.18

>=11.0

>=875

>=25

>=1990

37

33

295

263

<=180

N38UH

13.0

12.3

1.30

1.23

>=11.6

>=915

>=25

>=1990

40

36

318

287

<=180

N40UH

13.2

12.6

1.32

1.26

>=10.5

>=836

>=25

>=1990

42

38

334

289

<=180

EH

N30EH

11.7

10.9

1.17

1.09

>=10.2

>=812

>=30

>=2388

32

28

255

223

<=200

N33EH

12.2

11.4

1.22

1.14

>=10.7

>=851

>=30

>=2388

35

31

279

2247

<=200

N35EH

12.5

11.8

1.25

1.18

>=11.0

>=875

>=30

>=2388

37

33

295

263

<=200

N38EH

13.0

12.2

1.30

1.22

>=11.5

>=915

>=30

>=2387

40

36

318

287

<=200

AH

N28AH

11.0

10.4

1.10

1.04

>=9.70

>=772

>=35

>=2786

29

26

231

207

<=220

N30AH

11.7

10.8

1.17

1.08

>=10.2

>=812

>=35

>=2786

32

28

255

223

<=220

N33AH

12.2

11.4

1.22

1.14

>=10.7

>=851

>=35

>=2786

35

31

279

247

<=220

N35AH

12.5

11.7

1.25

1.17

>=11.0

>=876

>=35

>=2386

37

33

295

263

<=220

1.Licensed Products by SSMC-MQ - ISO 9002 Quality Standard Certified
2.The above-mentioned data of magnetic parameters and physical properties are given at room temperature.
3.The maximum service temperature of magnet is changeable due to the ratio length and diameter and environmental factors.
4. Special properties can be achieved with custom method.

Physical and Mechanical Properties

Thermal Conductivity

7.7 kcal/m-h-°C

Young's Modulus

1.7 x 104 kg/mm2

Bending Strength

24 kg/mm2

Compressive Strength

80 kg/mm2

Electrical Resistivity

160 µ-ohm-cm/cm2

Density

7.4-7.55 g/cm3

Vickers Hardness

500 - 600

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Bonded NdFeB Magnets

*Download: Catalogue of Bonded NdFeB Magnets  (1775KB)

Bonded NdFeB magnets are manufactured by binding rapid-quenching NdFeB powder. The powder is mixed with resin to form a magnet by compression molding with epoxy or infection molding with nylon. The latter technique is particular effective in large volume production, though the magnetic value of products is lower than those made with compression molding because of their relatively lower density. Various shapes of high dimensional accuracy can be produced without further processing. Surface is treated by epoxy coating or nickel-plating to prevent corrosion

With different ratio of additives to NdFeB powder, magnetic properties of hybrid NdFeB magnets can be tuned in a wide range. Once the ratio is fixed, magnetic property fluctuation can still be limited in a narrow bank. Hybrid magnets will meet customerˇŻs specified properties.

Rapidly quenched NdFeB powder used for bonded magnets is multi grain with grain size of sub-micron. Powder is isotropic in magnetic properties, which results in flat increasing of remanence and intrinsic coercivity with applied field. Magnet can only be magnetized to saturation in high fields.

Advantages of Bonded Magnets

*Produced with high efficiency, stability and repeatability.
*Magnet and other part may form together in one step.
*Free choice of magnetizing direction-especially for multi-polar applications
*High dimensional accuracy-large quantity applications with minimum post-press machining.
*Thin-wall ring and complex shape magnets.
*High resistance to corrosion.

Bonded NdFeB Magnets(Injection Molded)
Typical Magnetic Properties

Grade

Max. Energy Product

Remanence

Coercive Force

Rev. Temp. Coeff.

Working Temp.

Density

(BH)max

Br

Hc

Hci

Bd

Hd

Tc

D

MGOe

kJ/m3

T

kOe

kA/m

kOe

kA/m

%/°C

%/°C

°C

g/cm3

BNI-2

0.8-3.0

6.4-24

0.2-0.4

1.5-3.0

120-240

7.0-9.0

560-720

-0.15

-0.40

130

3.5-4.0

BNI-4

3.5-4.5

28-36

0.4-0.49

3.1-3.9

247-310

7.2-9.2

573-732

-0.10

-0.40

180

4.0-5.0

BNI-6

5.2-7.0

42-56

0.49-0.57

3.9-4.8

312-382

8.0-10.0

637-796

-0.10

-0.40

150

5.0-5.5

BNI-8

7.4-8.4

59-67

0.57-0.63

4.8-5.4

382-430

8.5-10.5

676-835

-0.10

-0.40

150

5.0-5.5

BNI-6H

5.0-6.5

40-52

0.48-0.56

4.2-5.0

334-398

13.0-17.0

1035-1353

-0.15

-0.4

180

5.0-5.5

Bonded NdFeB Magnets(Compression Bonded)
Typical Magnetic Properties

Grade

Max. Energy Product

Remanence

Coercive Force

Rev. Temp.
Coeff.

Working Temp.

Density

(BH)max

Br

Hc

Hci

Bd

Hd

Tw

D

MGOe

kJ/m3

T

kOe

kA/m

kOe

kA/m

%/°C

%/°C

°C

g/cm3

BNP-6

5.0-7.0

40-56

0.52-0.60

3.8-4.5

304-360

8.0-10

640-800

-0.10

-0.40

140

5.3-5.8

BNP-8

7.0-9.0

56-72

0.60-0.65

4.5-5.5

360-440

8.0-12

640-960

-0.10

-0.40

140

5.6-6.0

BNP-10

9.0-10.0

72-80

0.65-0.70

4.5-5.8

360-464

8.0-12

640-960

-0.10

-0.40

120

5.8-6.1

BNP-12

10.0-12.0

80-96

0.70-0.76

5.8-6.0

424-480

8.0-11

640-880

-0.10

-0.40

130

6.0-6.2

BNP-8H

6.0-9.0

48-72

0.55-0.62

5.0-6.0

400-480

12-16

960-1280

-0.07

-0.40

120

5.6-6.0


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