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    1. Hangzhou Dowell Magnet Co., Limited
      Products Category
      CONTACT US

      Name: Emily Yao
      +86-571-87425955/87425230
      +86-571-87425665
      +86-13957145940
      support@dowellmagnet.com
      Add: 5/F, Building A, Fudi Yi Center, No. 1243 Mogan Road, Hangzhou, China
      Dowellmagnet

      Products > Neodymium Magnet

      General Information 

             Neodymium permanent magnet material available in the early 1980s, is now widely used in motor (motor), speakers (speaker), toys (toys) and some electrical appliances (electron), and other products. Components for Nd2Fe14B. Have very high magnetic properties, the largest energy product (BHmax) higher than the ferrite 10 times more. Its own mechanical properties is also very good, cutting different shapes and bored. High-performance products of the highest temperature of up to 200 degrees Celsius. Because of its material content easily lead to corrosion, according to different requirements of different surface coating. (Such as plating Zn, Ni, Au, Epoxy, etc.)

             Third-generation rare earth permanent magnet of Neodymium magnets(NdFeB) is a contemporary of the strongest magnets in the permanent magnet, it is not only a high residual magnetism, high coercivity, high-energy product, such as high cost performance characteristics, and easy processing into the Sizes, it exert very high forces and can attract each other through large distances making them very popular. It iis now widely used in aviation, aerospace, electronics, electro-acoustic, mechanical and electrical, instruments, meters, antenna, medical technology and other devices needed Wing magnetic field equipment, especially for developing high-performance, small size, light And updating of the various products.
       

      Advantages of our Neodymium Magnet: 

      1. We are gradually improving and advanced the implementation of the "automatic scales casting - hydrogenation, steam-ground flour - the closure of pressure - for sintering" production methods.
      2. Possession of advanced processing and production lines, all kinds of machines more than 3000 units to undertake various kinds of high-volume orders.
      3. can be mass-produced ultra-small and very large magnet. If Φ1 mm or Φ180 mm, and so on.
      4. have the most advanced surface treatment and plating production lines, chemical plating, electroplating, plating and organic compound phosphate spraying and treatment.
      5. the use of advanced production technology of hypoxia excellent corrosion-resistant magnet production and mass production of high-performance NdFeB N45 above products. Mass production can supply sufficient magnetic radiation isotropic and anisotropy NdFeB magnetic ring.
      6. based on the establishment of ISO quality system, and implementing the 6 sigma quality management thinking, and optimize the production process, reducing cost of the product.
      7. advanced physics and chemistry laboratory and a strong R & D team as the production of high-performance, high-quality products strong guarantee.
      8. a number of senior experts in related subjects in the research and production security, well-known research institutions and start cooperation on cross-cutting.

      Magnetic characteristics:

      Grades

        Remanence Br

      Coercive Force Hcb

      Intrinsic Coercivity Hcj

      Maximum Energy Product (BH)max

      Curie Temp. TC

      Temp. Coefficient TW

       
       

      T

      KGs

      KA/m

      KOe

      KA/m

      Koe

      KJ/m3

      MGOe

       

      N35

      1.18-1.23

      11.8-12.3

      ≥868

      ≥10.9

      ≥955

      ≥12

      263-287

      33-36

      310

      ≤80

       

      N38

      1.22-1.28

      12.2-12.8

      ≥899

      ≥11.3

      ≥955

      ≥12

      287-310

      36-39

      310

      ≤80

       

      N40

      1.26-1.31

      12.6-13.1

      ≥923

      ≥11.6

      ≥955

      ≥12

      302-326

      38-41

      310

      ≤80

       

      N42

      1.28-1.34

      12.8-13.4

      ≥923

      ≥11.6

      ≥955

      ≥12

      318-342

      40-43

      310

      ≤80

       

      N45

      1.33-1.38

      13.3-13.8

      ≥923

      ≥11.6

      ≥955

      ≥12

      342-366

      43-46

      310

      ≤80

       

      N48

      1.38-1.42

      13.8-14.2

      ≥923

      ≥11.6

      ≥955

      ≥12

      358-390

      45-48

      310

      ≤80

       

      N50

      1.40-1.45

      14.0-14.5

      ≥836

      ≥10.5

      ≥876

      ≥11

      382-406

      48-51

      310

      ≤80

       

      N52

      1.43-1.48

      14.3-14.8

      ≥796

      ≥10.0

      ≥876

      ≥11

      398-422

      50-53

      310

      ≤80

       

      N35M

      1.17-1.22

      11.7-12.2

      ≥868

      ≥10.9

      ≥1114

      ≥14

      263-287

      33-36

      320

      ≤100

       

      N38M

      1.22-1.25

      12.2-12.5

      ≥899

      ≥11.3

      ≥1114

      ≥14

      287-310

      36-39

      320

      ≤100

       

      N40M

      1.25-1.28

      12.5-12.8

      ≥923

      ≥11.6

      ≥1114

      ≥14

      302-326

      38-41

      320

      ≤100

       

      N42M

      1.28-1.32

      12.8-13.2

      ≥955

      ≥12.0

      ≥1114

      ≥14

      318-342

      40-43

      320

      ≤100

       

      N45M

      1.32-1.38

      13.2-13.8

      ≥995

      ≥12.5

      ≥1114

      ≥14

      342-366

      43-46

      320

      ≤100

       

      N48M

      1.36-1.43

      13.6-14.3

      ≥1027

      ≥12.9

      ≥1114

      ≥14

      366-390

      46-49

      320

      ≤100

       

      N50M

      1.40-1.45

      14.0-14.5

      ≥1033

      ≥13.0

      ≥1114

      ≥14

      382-406

      48-51

      320

      ≤100

       

      N33H

      1.14-1.19

      11.4-11.9

      ≥836

      ≥10.5

      ≥1353

      ≥17

      247-270

      31-34

      330

      ≤120

       

      N35H

      1.17-1.22

      11.7-12.2

      ≥868

      ≥10.9

      ≥1353

      ≥17

      263-287

      33-36

      330

      ≤120

       

      N38H

      1.22-1.25

      12.2-12.5

      ≥899

      ≥11.3

      ≥1353

      ≥17

      287-310

      36-39

      330

      ≤120

       

      N40H

      1.25-1.28

      12.5-12.8

      ≥923

      ≥11.6

      ≥1353

      ≥17

      302-326

      38-41

      330

      ≤120

       

      N42H

      1.28-1.32

      12.8-13.2

      ≥955

      ≥12.0

      ≥1353

      ≥17

      318-342

      40-43

      330

      ≤120

       

      N45H

      1.30-1.36

      13.0-13.6

      ≥963

      ≥12.1

      ≥1353

      ≥17

      326-358

      43-46

      330

      ≤120

       

      N48H

      1.37-1.43

      13.7-14.3

      ≥995

      ≥12.5

      ≥1353

      ≥17

      366-390

      46-49

      330

      ≤120

       

      N30SH

      1.08-1.13

      10.8-11.3

      ≥810

      ≥10.2

      ≥1592

      ≥20

      223-247

      28-31

      340

      ≤150

       

      N33SH

      1.13-1.17

      11.3-11.7

      ≥844

      ≥10.6

      ≥1592

      ≥20

      247-271

      31-34

      340

      ≤150

       

      N35SH

      1.17-1.22

      11.7-12.2

      ≥876

      ≥11.0

      ≥1592

      ≥20

      263-287

      33-36

      340

      ≤150

       

      N38SH

      1.22-1.25

      12.2-12.5

      ≥907

      ≥11.4

      ≥1592

      ≥20

      287-310

      36-39

      340

      ≤150

       

      N40SH

      1.25-1.28

      12.5-12.8

      ≥939

      ≥11.8

      ≥1592

      ≥20

      302-326

      38-41

      340

      ≤150

       

      N42SH

      1.28-1.32

      12.8-13.2

      ≥987

      ≥12.4

      ≥1592

      ≥20

      318-342

      40-43

      340

      ≤150

       

      N45SH

      1.32-1.38

      13.2-13.8

      ≥1003

      ≥12.6

      ≥1592

      ≥20

      342-366

      43-46

      340

      ≤150

       

      N28UH

      1.02-1.08

      10.2-10.8

      ≥764

      ≥9.60

      ≥1990

      ≥25

      207-231

      26-29

      350

      ≤180

       

      N30UH

      1.08-1.13

      10.8-11.3

      ≥812

      ≥10.2

      ≥1990

      ≥25

      223-247

      28-31

      350

      ≤180

       

      N33UH

      1.13-1.17

      11.3-11.7

      ≥852

      ≥10.7

      ≥1990

      ≥25

      247-271

      31-34

      350

      ≤180

       

      N35UH

      1.18-1.22

      11.8-12.2

      ≥860

      ≥10.8

      ≥1990

      ≥25

      263-287

      33-36

      350

      ≤180

       

      N38UH

      1.22-1.25

      12.2-12.5

      ≥876

      ≥11.0

      ≥1990

      ≥25

      287-310

      36-39

      350

      ≤180

       

      N40UH

      1.25-1.28

      12.5-12.8

      ≥899

      ≥11.3

      ≥1990

      ≥25

      302-326

      38-41

      350

      ≤180

       

      N28EH

      1.04-1.09

      10.4-10.9

      ≥780

      ≥9.80

      ≥2388

      ≥30

      207-231

      26-29

      380

      ≤200

       

      N30EH

      1.08-1.13

      10.8-11.3

      ≥812

      ≥10.2

      ≥2388

      ≥30

      223-247

      28-31

      380

      ≤200

       

      N33EH

      1.13-1.17

      11.3-11.7

      ≥836

      ≥10.5

      ≥2388

      ≥30

      247-271

      31-34

      380

      ≤200

       

      N35EH

      1.17-1.22

      11.7-12.2

      ≥876

      ≥11.0

      ≥2388

      ≥30

      263-287

      33-36

      380

      ≤200

       

      N38EH

      1.22-1.29

      12.2-12.9

      ≥915

      ≥11.5

      ≥2388

      ≥30

      287-318

      36-40

      380

      ≤200

       

      N30AH

      1.08-1.15

      10.8-11.5

      ≥804

      ≥10.1

      ≥2786

      ≥35

      223-255

      28-32

      380

      ≤230

       

      N33AH

      1.14-1.21

      11.4-12.1

      ≥852

      ≥10.7

      ≥2786

      ≥35

      247-279

      31-35

      380

      ≤230

       
       

       

       

      Production Chart of Sintered NdFeB:
       

      Raw material →Mixing Vacuum → Melting Powder →Production →Cutting and Grinding →Testing →Vacuum Sintering →Molding →Surface Coating →Inspection →Packing →Shipping →After-sales Service 
       

       

      Surface coating: 

      Name White Zinc Colour Zinc Nickel ElectrolessNickel NiCuNi NiSn Epoxy Phosphating NiAu
      Coating Thickness(μm) 8-15 10-15 20-30 20-30 15-30 20-30 10-30 1-3 10-20
      Color Blue and white Multicolor Silver Silver Silver Silver Black Black Gold
      PCT 3 3 1 1 2 2 2 3 2
      Humidity Test 3 3 1 1 1 1 1 2 2
      Salt Spray Test 3 2 3 1 2 2 1 3 2
      Collision Test 2 2 1 1 1 1 1 3 1

        

       
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