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Permanent Magnets
  • Sintered Neodymium MagnetAs lanthanide series of elements in the periodic table, sintered neodymium magnets (sintered NdFeB magnets or sintered NIB magnets) are also known as rare earth magnets. Featured by outstanding magnetic properties, they are the most powerful magnets used today...
  • Bonded Neodymium MagnetBonded NdFeB magnets are manufactured with melt spinning of a thin ribbon of NdFeB alloy. This ribbon contains randomly oriented Nd2Fe14B nano-scale grains. Then, the ribbon is pulverized into particles and mixed with a polymer. At last, it is compressed into bonded neodymium...

Neodymium Magnets

Description
Neodymium magnet is mainly made from the alloy of neodymium, iron and boron. It is a kind of rare earth magnet which is most widely used. In Nd2Fe14B tetragonal crystalline structure, it is also called NdFeB magnet or NIB magnet. It is the strongest type of permanent magnet made so far, so neo magnet is known as the king of magnets and widely utilized in various fields. They may be either sintered ones or bonded ones.

Types
1. Sintered Neodymium Magnet
2. Bonded Neodymium Magnet

Shapes
1. These magnets are featured by small size, metallic appearance and simple shapes such as rings, blocks and discs.
2. We can customize NdFeB magnets according to customers’ requests.

Choose Neodymium Magnet from Following Shapes


Square Neodymium Magnets
Disc Neodymium Magnets
Custom Neodymium Magnets

Applications
NdFeB magnets are widely applied in aviation field, aerospace field, electronic industry, electrical industry, mechanical industry, instrument manufacturing, transportation industry, medical field, commodity industry, etc. Exactly speaking, they are used in machineries which are equipped with magnetic devices.

Manufacturing Process of Neodymium Magnet
Mill neodymium, iron, boron and transition metals into NdFeB powder, then compact the powder into desirable shape. Next, sinter the compacted powder and melt it. Cool down the melted metal, you will find it becomes a solid metal item. Then, conduct finish machining on the metal item. There are two forms for pressing: die pressing and isostatic pressing.

Maintenance of NdFeB Magnet
DO NOT place neodymium magnets in following environments to prevent them from rusting or reducing magnetic performance.
1. Acid or Alkali Liquor
2. Organic Solvent
3. Electrolyte
4. Water or Oil
5. Hydrogen
6. Active Gas like Chlorine, Ammonia, Oxynitride
7. Radiation or Radioactive Rays

Package and Delivery of Neodymium Magnet
1. NIB magnet is packaged in cartons.
2. During transportation, handle the cargo with care. Besides, the cargo should be shockproof, rainproof and be placed in ventilated, dry, no-erosion environment.
3. Deliver cycle is about 20 days.

Physical Properties of NdFeB Magnet

Property Specification
Hardness 570 HV
Resistivity 150 μΩ·cm (10℃-120℃)
Compressive Strength 780 N/mm2
Thermal Expansivity (Vertical to Reference Direction) -4.8 × 10-6 K
Thermal Expansivity (Parallel to Reference Direction) 3.4 × 10-6 K

Size Specifications of Neodymium Magnet

Ring Shape Outer Diameter Inner Diameter Thickness Disc Shape Diameter Thickness
Max. 100.00 mm 80.00 mm 30.00 mm Max. 50.00 mm 20.00 mm
Min. 2.60 mm 1.80 mm 0.50 mm Min. 1.20 mm 0.50 mm
Tolerance +/-0.1 mm +/-0.1 mm +/-0.1 mm Tolerance +/-0.1 mm +/-0.1 mm
Square Shape Length Width Thickness Customized Shapes
Max. 80.00 mm 80.00 mm 30.00 mm
Min. 2.00 mm 1.50 mm 0.50 mm According to Samples or Design Data
Tolerance +/-0.1 mm +/-0.1 mm +/-0.1 mm

Max. Working Temperature of Neodymium Magnet

Type Max. Working Temperature (Pc=1)
N 80 ℃
M 100 ℃
H 120 ℃
SH 150 ℃
UH 180 ℃
EH 200 ℃

Surface Treatment of NIB Magnet

Item Specification
Metal Zn, Ni, Ag, Au
Organic Substance Epoxy Resin Spraying, Ni and Epoxy Resin Spraying
  Surface Passivation

Magnetization Directions of Neodymium Magnet
a. Thickness Magnetized
b. Axially Magnetized
c. Diametrally Magnetized
d. Multi-poles Magnetized
e. Radially Magnetized
f. Customized Specific Requirements Magnetized

Magnetic Properties of Neodymium Magnet

Grade Remanence Coercive Force Intrinsic Coercive Force Maximum Energy Product Temperature Density
Br Hcb Hcj (BH) Max. Tw ρ
T KGs KA/m KOe KA/m KOe KJ/m3 MGOe ℃ g/cm3
N35 1.17-1.22 11.7-12.2 ≥859 ≥10.8 ≥955 ≥12 263-287 33-36 ≤80 ≥7.4
N38 1.22-1.26 12.2-12.6 ≥859 ≥10.8 ≥955 ≥12 287-303 36-38 ≤80 ≥7.5
N40 1.26-1.29 12.6-12.9 ≥836 ≥10.5 ≥955 ≥12 303-318 38-40 ≤80 ≥7.5
N42 1.29-1.32 12.9-13.2 ≥836 ≥10.5 ≥955 ≥12 318-342 40-43 ≤80 ≥7.5
N45 1.32-1.37 13.2-13.7 ≥836 ≥10.5 ≥955 ≥12 342-359 43-45 ≤80 ≥7.5
N48 1.36-1.42 13.6-14.2 ≥836 ≥10.5 ≥955 ≥12 358-382 45-49 ≤80 ≥7.5
N50 1.40-1.45 14.0-14.5 ≥836 ≥10.5 ≥955 ≥12 374-406 47-51 ≤80 ≥7.5
N52 1.42-1.48 14.2-14.8 ≥836 ≥10.5 ≥876 ≥11 389-422 49-53 ≤80 ≥7.5
N30M 1.08-1.14 10.8-11.4 ≥812 ≥10.2 ≥1114 ≥14 223-247 28-31 ≤100 ≥7.5
N33M 1.14-1.17 11.4-11.7 ≥852 ≥10.7 ≥1114 ≥14 247-263 31-33 ≤100 ≥7.5
N35M 1.17-1.22 11.7-12.2 ≥876 ≥11.0 ≥1114 ≥14 263-287 33-36 ≤100 ≥7.5
N38M 1.22-1.26 12.2-12.6 ≥916 ≥11.5 ≥1114 ≥14 287-303 36-38 ≤100 ≥7.5
N40M 1.26-1.29 12.6-12.9 ≥939 ≥11.8 ≥1114 ≥14 303-318 38-40 ≤100 ≥7.5
N42M 1.29-1.32 12.9-13.2 ≥955 ≥12.0 ≥1114 ≥14 318-334 40-42 ≤100 ≥7.5
N45M 1.32-1.38 13.2-13.8 ≥987 ≥12.4 ≥1114 ≥14 334-366 42-46 ≤100 ≥7.5
N48M 1.36-1.42 13.6-14.2 ≥1018 ≥12.8 ≥1114 ≥14 358-390 45-49 ≤100 ≥7.5
N50M 1.39-1.45 13.9-14.5 ≥1050 ≥13.2 ≥1114 ≥14 374-406 47-51 ≤100 ≥7.5
N30H 1.08-1.14 10.8-11.4 ≥812 ≥10.2 ≥1353 ≥17 223-247 28-31 ≤120 ≥7.5
N33H 1.14-1.17 11.4-11.7 ≥851 ≥10.7 ≥1353 ≥17 247-263 31-33 ≤120 ≥7.5
N35H 1.17-1.22 11.7-12.2 ≥875 ≥11.0 ≥1353 ≥17 263-287 33-36 ≤120 ≥7.5
N38H 1.22-1.26 12.2-12.6 ≥916 ≥11.6 ≥1353 ≥17 287-303 36-38 ≤120 ≥7.5
N40H 1.26-1.29 12.6-12.9 ≥939 ≥11.8 ≥1353 ≥17 303-318 38-40 ≤120 ≥7.5
N42H 1.29-1.32 12.9-13.2 ≥955 ≥12.0 ≥1353 ≥17 318-334 40-42 ≤120 ≥7.5
N45H 1.32-1.38 13.2-13.8 ≥987 ≥12.4 ≥1353 ≥17 334-366 42-46 ≤120 ≥7.5
N48H 1.36-1.42 13.6-14.2 ≥1026 ≥12.9 ≥1273 ≥16 358-390 45-49 ≤120 ≥7.5
N30SH 1.08-1.14 10.8-11.4 ≥812 ≥10.2 ≥1592 ≥20 223-247 28-31 ≤150 ≥7.5
N33SH 1.14-1.17 11.4-11.7 ≥851 ≥10.7 ≥1592 ≥20 247-263 31-33 ≤150 ≥7.5
N35SH 1.17-1.22 11.7-12.2 ≥876 ≥11.0 ≥1592 ≥20 263-287 33-36 ≤150 ≥7.5
N38SH 1.22-1.26 12.2-12.6 ≥899 ≥11.3 ≥1592 ≥20 287-303 36-38 ≤150 ≥7.5
N40SH 1.26-1.29 12.6-12.9 ≥931 ≥11.7 ≥1592 ≥20 303-318 38-40 ≤150 ≥7.5
N42SH 1.29-1.32 12.9-13.2 ≥963 ≥12.1 ≥1592 ≥20 318-334 40-42 ≤150 ≥7.5
N44SH 1.30-1.36 13.0-13.6 ≥995 ≥12.3 ≥1592 ≥20 326-359 41-45 ≤150 ≥7.5
N30UH 1.08-1.14 10.8-11.4 ≥812 ≥10.2 ≥1990 ≥25 223-247 28-31 ≤180 ≥7.5
N33UH 1.14-1.17 11.4-11.7 ≥851 ≥10.7 ≥1990 ≥25 247-263 31-33 ≤180 ≥7.5
N35UH 1.17-1.22 11.7-12.2 ≥875 ≥11.0 ≥1990 ≥25 263-287 33-36 ≤180 ≥7.5
N38UH 1.22-1.26 12.2-12.6 ≥915 ≥11.5 ≥1990 ≥25 287-302 36-38 ≤180 ≥7.5
N40UH 1.26-1.32 12.6-13.2 ≥939 ≥11.8 ≥1990 ≥25 302-334 38-42 ≤180 ≥7.5
N30EH 1.08-1.14 10.8-11.4 ≥812 ≥10.2 ≥2388 ≥30 223-247 28-31 ≤200 ≥7.5
N33EH 1.14-1.17 11.4-11.7 ≥851 ≥10.7 ≥2388 ≥30 247-263 31-33 ≤200 ≥7.5
N35EH 1.17-1.25 11.7-12.5 ≥875 ≥11.0 ≥2388 ≥30 263-295 33-37 ≤200 ≥7.5
N38EH 1.22-1.29 12.2-12.9 ≥907 ≥11.4 ≥2388 ≥30 287-318 36-40 ≤200 ≥7.5
N30AH 1.08-1.20 10.8-12.0 ≥860 ≥10.8 ≥2626 ≥33 247-263 31-35 ≤220 ≥7.5
Application