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Sintered NdFeB properties

Introduction and performance table of NdFeB magnet

Introduction: The third generation rare earth permanent magnet NdFeB is a permanent magnet with stronger performance among contemporary magnets. Its BHmax value is 5-12 times that of ferrite magnets and 3-10 times that of alnico magnets; its coercivity is equivalent to 5-10 times that of ferrite magnets and 5- 15 times, its potential magnetic performance is extremely high, and it can suck up heavy objects 640 times its own weight. Since the main raw material iron of neodymium iron boron magnets is very cheap, the reserve of rare earth neodymium is 10-16 times more than that of samarium, so its price is much lower than that of samarium cobalt magnets. The mechanical properties of neodymium iron boron magnets are better than samarium cobalt magnets and alnico magnets, and it is easier to cut, drill and process complex shapes. The disadvantage of neodymium iron boron magnets is its poor temperature performance, large magnetic loss when used at high temperatures, and low maximum operating temperature. Generally, it is about 80 degrees Celsius, and the maximum working temperature of magnets with special treatment can reach 200 degrees Celsius. Because the material contains a lot of neodymium and iron, it is easy to rust and it is also a major weakness. Therefore, neodymium iron boron magnets must be surface coated. It can be electroplated with nickel (Ni), zinc (Zn), gold (Au), chromium (Cr), epoxy resin (Epoxy), etc. NdFeB magnets are currently widely used in aerospace, electronics, electromechanical, instrumentation, medical and other fields. And the use of non-technical fields is becoming more and more extensive, such as adsorption magnets, toys, jewelry and so on. Production process: Ingredients---->Smelting---->Powdering---->Forming---->Sintering---->Testing---->Machining---->Plating-- -->Magnetization---->Inspection---->Packing performance table:

No.

Grade

Remanence  Br

Coercive force  bHc

Intrinsic coercive
force iHc

Maximum energy product
(BH)max

Working temp

KG

T

KOe

KA/m

KOe

KA/m

MGOe

KJ/m3

°C

Nom.

Min.

Nom.

Min.

Nom.

Min.

Nom.

Min.

Nom.

Min.

Nom.

Min.

1

N30

11.2

10.8

1.12

1.08

10.5

9.8

836

780

>= 12

>= 955

30

28

239

223

<= 80

2

N33

11.7

11.4

1.17

1.14

11.0

10.3

876

820

>= 12

>= 955

33

31

263

247

<= 80

3

N35

12.1

11.7

1.21

1.17

11.5

10.8

915

860

>= 12

>= 955

35

33

279

263

<= 80

4

N38

12.6

12.2

1.26

1.22

11.5

10.8

915

860

>= 12

>= 955

38

36

303

287

<= 80

5

N40

12.9

12.6

1.29

1.26

11.0

10.5

876

836

>= 12

>= 955

40

38

318

303

<= 80

6

N42

13.2

12.6

1.32

1.26

11.0

10.5

876

836

>= 12

>= 955

42

40

342

326

<= 80

7

N45

13.7

13.3

1.37

1.33

11.0

10.5

876

836

>= 12

>= 955

45

43

358

342

<= 80

8

N48

14.1

13.7

1.41

1.37

11.0

10.5

876

836

>= 12

>= 955

48

46

383

367

<= 80

9

N30M

11.2

10.8

1.12

1.08

10.5

9.8

836

780

>= 14

>= 1114

30

28

239

223

<= 100

10

N33M

11.7

11.4

1.17

1.14

11.0

10.3

876

820

>= 14

>= 1114

33

31

263

247

<= 100

11

N35M

12.1

11.7

1.21

1.17

11.5

10.8

915

860

>= 14

>= 1114

35

33

279

263

<= 100

12

N38M

12.6

12.2

1.26

1.22

11.5

10.8

915

860

>= 14

>= 1114

38

36

303

257

<= 100

13

N40M

12.9

12.6

1.29

1.26

11.5

10.8

915

860

>= 14

>= 1114

40

38

318

303

<= 100

14

N42M

13.2

12.9

1.32

1.29

11.0

10.5

876

836

>= 14

>= 1114

42

40

342

326

<= 100

15

N45M

13.7

13.3

1.37

1.33

11.0

10.5

976

836

>= 14

>= 1114

45

43

358

342

<= 100

16

N48M

14.1

13.7

1.41

1.37

11.0

10.5

876

836

>= 14

>= 1114

48

46

383

367

<= 100

17

N30H

11.2

10.8

1.12

1.08

10.5

9.8

836

780

>= 17

>= 1353

30

28

239

223

<= 120

18

N33H

11.7

11.4

1.17

1.14

11.0

10.3

876

820

>= 17

>= 1353

33

31

263

247

<= 120

19

N35H

12.1

11.7

1.21

1.17

11.5

10.8

915

860

>= 17

>= 1353

35

33

279

263

<= 120

20

N40H

12.9

12.6

1.29

1.26

12.0

11.5

955

915

>= 17

>= 1353

40

38

318

303

<= 120

21

N42H

13.2

12.9

1.32

1.29

11.0

10.5

876

836

>= 17

>= 1353

42

40

342

326

<= 120

22

N45H

13.7

13.3

1.37

1.33

11.0

10.5

876

836

>= 17

>= 1353

45

43

358

342

<= 120

23

N34AH

11.6

11.0

1.16

1.10

11.3

10.5

900

836

>= 32

>= 2547

34

31

271

247

<= 240

24

N30SH

11.2

10.8

1.12

1.08

10.5

9.8

836

780

>= 20

>= 1595

30

28

239

223

<= 150

25

N33SH

11.7

11.4

1.17

1.14

11.0

10.3

876

820

>= 20

>= 1595

33

31

263

247

<= 150

26

N35SH

12.1

11.7

1.21

1.17

11.5

10.8

915

860

>= 20

>= 1595

35

33

279

263

<= 150

27

N38SH

12.6

12.2

1.26

1.22

12.3

11.8

979

939

>= 20

>= 1595

38

36

303

287

<= 150

28

N40SH

12.9

12.6

1.29

1.26

12.6

12.0

1003

955

>= 20

>= 1595

40

38

318

303

<= 150

29

N42SH

13.2

12.9

1.32

1.29

11.0

10.5

876

836

>= 20

>= 1595

42

40

342

326

<= 150

30

N28UH

10.8

10.4

1.08

1.04

10.2

9.8

812

780

>= 25

>= 1990

28

26

223

207

<= 180

31

N30UH

11.2

10.8

1.12

1.08

10.6

10.1

844

804

>= 25

>= 1990

30

28

239

223

<= 180

32

N33UH

11.7

11.4

1.17

1.14

11.0

10.3

875

820

>= 25

>= 1990

33

31

263

247

<= 180

33

N35UH

12.1

11.7

1.21

1.17

11.5

10.8

915

860

>= 25

>= 1990

35

33

279

263

<= 180

34

N38UH

12.6

12.2

1.26

1.22

12.0

11.4

955

908

>= 25

>= 1990

38

35

303

279

<= 180

35

N40UH

12.9

12.6

1.29

1.26

12.4

11.8

987

940

>= 25

>= 1990

40

38

319

303

<= 180

36

N26EH

10.4

10.0

1.04

1.00

10.2

9.6

812

764

>= 30

>= 2388

26

24

207

191

<= 200

37

N28EH

10.8

10.4

1.08

1.04

10.4

9.8

811

780

>= 30

>= 2388

28

26

223

207

<= 200

38

N30EH

12.2

10.8

1.12

1.08

10.6

10.1

844

804

>= 30

>= 2388

30

28

239

223

<= 200

39

N33EH

11.6

11.2

1.16

1.12

11.0

10.4

876

828

>= 30

>= 2388

33

30

263

239

<= 200

40

N35EH

12.1

11.7

1.21

1.17

11.5

10.8

915

860

>= 30

>= 2388

36

33

287

263

<= 200