NdFeB
Alnico
SmCo
Magnets for Coreless Motors
Magnets for Coin Motors
Flexible Magnets
For more products information, please click "Information"


NdFeB
Neodymium Iron Boron Magnet Materials

Sintered NdFeB Magnets

Sintered NdFeB magnets are the most powerful commercialized permanent magnets available today, with maximum energy product ranging from 26 MGOe to 52 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

Grade

Max. Energy Product

Remanence

Coercive Force

Rev. Temp. Coeff.

Curie Temp.

Working Temp.

(BH)max

Br

Hc

Hci

Bd

Hd

Tc

Tw

MGOe

kJ/m3

kG

mT

kOe

kA/m

kOe

kA/m

%/°C

%/°C

°C

°C

N33

31-33

247-263

11.30-11.70

1130-1170

>10.5

>836

>12

>955

-0.12

-0.60

310

80

N35

33-36

263-287

11.70-12.10

1170-1210

>10.9

>868

>12

>955

-0.12

-0.60

310

80

N38

36-39

287-310

12.10-12.50

1210-1250

>11.3

>899

>12

>955

-0.12

-0.60

310

80

N40

38-41

302-326

12.50-12.80

1250-1280

>11.6

>923

>12

>955

-0.12

-0.60

310

80

N42

40-43

318-342

12.80-1320

1280-1320

>11.6

>923

>12

>955

-0.12

-0.60

310

80

N45

43-46

342-366

13.20-13.80

1320-1380

>11.0

>876

>12

>955

-0.12

-0.60

310

80

N48

46-49

366-390

13.80-14.20

1380-1420

>10.5

>835

>11

>876

-0.12

-0.60

310

80

N30M

28-32

223-255

10.90-11.70

1090-1170

>10.2

>812

>14

>1114

-0.12

-0.59

320

100

N33M

31-35

247-279

11.40-12.20

1140-1220

>10.7

>851

>14

>1114

-0.12

-0.59

320

100

N35M

33-37

263-294

11.80-12.50

1180-1250

>11.0

>875

>14

>1114

-0.12

-0.59

320

100

N38M

36-40

286-318

12.30-13.00

1230-1300

>11.5

>915

>14

>1114

-0.12

-0.59

320

100

N40M

38-42

302-334

12.60-13.20

1260-1320

>11.8

>939

>14

>1114

-0.12

-0.59

320

100

N42M

40-44

318-350

13.00-13.50

1300-1350

>12.0

>955

>14

>1114

-0.12

-0.59

320

100

N45M

42-46

334-366

13.20-13.80

1320-1380

>12.2

>971

>14

>1114

-0.12

-0.59

320

100

N33H

31-34

247-271

11.30-11.70

1130-1170

>10.5

>836

>17

>1353

-0.11

-0.58

320-350

120

N35H

33-36

263-287

11.70-12.10

1170-1210

>10.9

>868

>17

>1353

-0.11

-0.58

320-350

120

N38H

36-39

287-310

12.10-12.50

1210-1250

>11.3

>899

>17

>1353

-0.11

-0.58

320-350

120

N40H

38-41

302-326

12.40-12.80

1240-1280

>11.6

>923

>17

>1353

-0.11

-0.58

320-350

120

N42H

40-43

318-342

12.80-13.20

1280-1320

>12.0

>955

>17

>1360

-0.11

-0.58

320-350

120

N33SH

31-34

247-272

11.30-11.70

1130-1170

>10.6

>844

>20

>1592

-0.11

-0.55

340-360

150

N35SH

33-36

263-287

11.70-12.10

1170-1210

>11.0

>876

>20

>1592

-0.11

-0.55

340-360

150

N38SH

36-39

287-310

12.10-12.50

1210-1250

>11.4

>907

>20

>1592

-0.11

-0.55

340-360

150

N40SH

38-41

302-326

12.10-12.80

1240-1280

>11.8

>939

>20

>1592

-0.11

-0.55

340-360

150

N28UH

26-29

207-231

10.20-10.80

1020-1080

>9.6

>768

>25

>1990

-0.11

-0.51

350-380

180

N30UH

28-31

223-247

10.80-11.30

1080-1130

>10.2

>816

>25

>1990

-0.11

-0.51

350-380

180

N33UH

31-34

247-271

11.30-11.70

1130-1170

>10.7

>856

>25

>1990

-0.11

-0.51

350-380

180

N28EH

26-29

211-236

10.40-10.90

1040-1090

>9.8

>784

>30

>2388

-0.11

-0.51

350-380

200

N30EH

28-31

223-247

10.80-11.30

1080-1130

>10.2

>812

>30

>2388

-0.11

-0.51

350-380

200

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.

« back to top

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


Bonded NdFeB Magnets

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


« back to top
Copy Right © 1996-2017   Qiangsheng Magnets Co., Ltd   All Rights Reserved
Add: 1512 Room Gelankangdu First Building, Guihua Road, Changsha, P. R. China.P.C. 41000
Tel: +86 731 82039 474 Fax: +86 731 84455 474
Qingdao office:Add: 516 Room, 12A Donghai West Road, Qingdao, P. R. China.P.C. 266071
Tel: +86 532 8097 2318 Fax: +86 532 8093 8659
USA office:Add: 6775 Verde Ridge Road, Rancho Palos Verdes, CA 90275 USA
Tel: +1 310 375 8169 Fax: +1 310 872 5390
European Office:Add:ARVEE UG (haftungsbeschränkt), Landwehr 65, 44534 Lünen, Germany.
Tel: +49 (0) 2306 8564380 Fax: +49 (0) 2306 8564379 Mobile +49 (0) 160 96 87 59 65
E-mail:info@QM-magnets.com   www.QM-magnets.com
Hunan ICP No.12008623