Sintered NdFeB Magnets
Sintered NdFeB magnets, also known as neodymium magnets, are the strongest type of permanent magnets available today. They are particularly suitable for high volume production in a wide variety of shape and size. Precise dimensional control is achieved in machining processes.
Composition of Sintered NdFeB Magnets
Neodymium (Nd)
Iron (Fe)
Boron (B)
These elements are combined to form an Nd2Fe14B tetragonal crystalline structure, which gives neodymium magnets their remarkable magnetic properties. Sometimes, small amounts of other elements such as dysprosium or terbium are added to improve the magnets' temperature stability and resistance to demagnetization.
NdFeB magnets magnetic property chart
| Br | Hcb | Hcj | (BH)max | MAX.Working Temperature | ||||
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 | ≤80 |
N38 | 1.22-1.28 | 12.2-12.8 | ≥899 | ≥11.3 | ≥955 | ≥12 | 287-310 | 36-39 | ≤80 |
N40 | 1.26-1.31 | 12.6-13.1 | ≥923 | ≥11.6 | ≥955 | ≥12 | 302-326 | 38-41 | ≤80 |
N42 | 1.28-1.34 | 12.8-13.4 | ≥923 | ≥11.6 | ≥955 | ≥12 | 318-342 | 40-43 | ≤80 |
N45 | 1.33-1.38 | 13.3-13.8 | ≥876 | ≥11.0 | ≥955 | ≥12 | 342-366 | 43-46 | ≤80 |
N48 | 1.38-1.42 | 13.8-14.2 | ≥836 | ≥10.5 | ≥876 | ≥11 | 358-390 | 45-48 | ≤80 |
N50 | 1.40-1.45 | 14.0-14.5 | ≥836 | ≥10.5 | ≥876 | ≥11 | 382-406 | 48-51 | ≤80 |
N52 | 1.42-1.48 | 14.2-14.8 | ≥796 | ≥10.0 | ≥876 | ≥11 | 390-422 | 49-53 | ≤80 |
N35M | 1.17-1.22 | 11.7-12.2 | ≥868 | ≥10.9 | ≥1114 | ≥14 | 263-287 | 33-36 | ≤100 |
N38M | 1.22-1.25 | 12.2-12.5 | ≥899 | ≥11.3 | ≥1114 | ≥14 | 287-310 | 36-39 | ≤100 |
N40M | 1.25-1.28 | 12.5-12.8 | ≥923 | ≥11.6 | ≥1114 | ≥14 | 302-326 | 38-41 | ≤100 |
N42M | 1.28-1.32 | 12.8-13.2 | ≥955 | ≥12 | ≥1114 | ≥14 | 318-342 | 40-43 | ≤100 |
N45M | 1.32-1.38 | 13.2-13.8 | ≥955 | ≥12.5 | ≥1114 | ≥14 | 342-366 | 43-46 | ≤100 |
N48M | 1.36-1.43 | 13.6-14.3 | ≥1027 | ≥12.9 | ≥1114 | ≥14 | 366-390 | 46-49 | ≤100 |
N50M | 1.40-1.45 | 14.-14.5 | ≥1033 | ≥13.0 | ≥1114 | ≥14 | 382-406 | 48-51 | ≤100 |
N35H | 1.17-1.22 | 11.7-12.2 | ≥868 | ≥10.9 | ≥1353 | ≥17 | 263-287 | 33-36 | ≤120 |
N38H | 1.22-1.25 | 12.2-12.5 | ≥899 | ≥11.3 | ≥1353 | ≥17 | 287-310 | 36-39 | ≤120 |
N40H | 1.25-1.28 | 12.5-12.8 | ≥923 | ≥11.6 | ≥1353 | ≥17 | 302-326 | 38-41 | ≤120 |
N42H | 1.28-1.32 | 12.8-13.2 | ≥955 | ≥12.0 | ≥1353 | ≥17 | 318-342 | 40-43 | ≤120 |
N45H | 1.30-1.36 | 13.0-13.6 | ≥963 | ≥12.1 | ≥1353 | ≥17 | 342-366 | 43-46 | ≤120 |
N48H | 1.37-1.43 | 13.7-14.3 | ≥955 | ≥12.5 | ≥1353 | ≥17 | 366-390 | 46-49 | ≤120 |
N33SH | 1.13-1.17 | 11.3-11.7 | ≥844 | ≥10.6 | ≥1592 | ≥20 | 247-271 | 31-34 | ≤150 |
N35SH | 1.17-1.22 | 11.7-12.2 | ≥876 | ≥11.0 | ≥1592 | ≥20 | 263-287 | 33-36 | ≤150 |
N38SH | 1.22-1.25 | 12.2-12.5 | ≥907 | ≥11.4 | ≥1592 | ≥20 | 287-310 | 36-39 | ≤150 |
N40SH | 1.25-1.28 | 12.5-12.8 | ≥939 | ≥11.8 | ≥1592 | ≥20 | 302-326 | 38-41 | ≤150 |
N42SH | 1.28-1.32 | 12.8-13.2 | ≥939 | ≥11.8 | ≥1600 | ≥20 | 310-342 | 39-43 | ≤150 |
N45SH | 1.31-1.36 | 13.1-13.6 | ≥955 | ≥12.0 | ≥1600 | ≥20 | 342-366 | 43-46 | ≤150 |
N28UH | 1.02-1.08 | 10.2-10.8 | ≥764 | ≥9.60 | ≥1990 | ≥25 | 207-231 | 26-29 | ≤180 |
N30UH | 1.08-1.13 | 10.8-11.3 | ≥812 | ≥10.2 | ≥1990 | ≥25 | 223-247 | 28-31 | ≤180 |
N33UH | 1.13-1.17 | 11.3-11.7 | ≥852 | ≥10.7 | ≥1990 | ≥25 | 247-271 | 31-34 | ≤180 |
N35UH | 1.18-1.22 | 11.8-12.2 | ≥860 | ≥10.8 | ≥1990 | ≥25 | 263-287 | 33-36 | ≤180 |
N38UH | 1.22-1.25 | 12.2-12.5 | ≥876 | ≥11.0 | ≥1990 | ≥25 | 287-310 | 36-39 | ≤180 |
N28EH | 1.04-1.09 | 10.4-10.9 | ≥780 | ≥9.80 | ≥2388 | ≥30 | 207-231 | 26-29 | ≤200 |
N30EH | 1.08-1.13 | 10.8-11.3 | ≥812 | ≥10.2 | ≥2388 | ≥30 | 223-247 | 28-31 | ≤200 |
N33EH | 1.13-1.17 | 11.3-11.7 | ≥836 | ≥10.5 | ≥2388 | ≥30 | 247-271 | 31-34 | ≤200 |
N35EH | 1.17-1.22 | 11.7-12.2 | ≥876 | ≥11.0 | ≥2388 | ≥30 | 263-287 | 33-36 | ≤200 |
N28AH | 1.03-1.09 | 10.3-10.9 | ≥780 | ≥9.80 | ≥2786 | ≥35 | 207-231 | 26-29 | ≤220 |
N30AH | 1.08-1.13 | 10.8-11.3 | ≥812 | ≥10.2 | ≥2786 | ≥35 | 223-247 | 28-31 | ≤220 |
Advantages of Sintered NdFeB Magnets
Exceptional Strength: They are the strongest type of permanent magnet, offering high magnetic performance in compact sizes.
High Coercivity: These magnets have high resistance to demagnetization, making them reliable for various applications.
Versatility: Available in a wide range of shapes and sizes to meet specific application requirements.
Energy Efficiency: Used in electric motors and generators to improve energy efficiency and performance.
Shapes and Forms of Sintered NdFeB Magnets
Blocks: Rectangular shapes often used in motors and sensors.
Discs: Round, flat shapes suitable for a variety of applications.
Rings: Cylindrical shapes with a hole in the middle, used in magnetic couplings and bearings.
Cylinders: Long, cylindrical shapes ideal for specific engineering applications.
Custom Shapes: Tailored to meet specific design requirements.
Applications of Sintered NdFeB Magnets
Due to their strong magnetic properties, sintered NdFeB magnets are used in numerous applications, including:
Electric Motors and Generators: Providing high efficiency and performance in electric and hybrid vehicles.
Wind Turbines: Used in the generators to convert wind energy into electrical energy.
Magnetic Resonance Imaging (MRI): Critical components in MRI machines for medical imaging.
Magnetic Separators: Used in industries to separate ferrous materials from non-ferrous materials.
Sensors and Actuators: Used in various sensors and precision actuators.
For more detailed information on Sintered NdFeB magnets, including technical specifications and custom solutions, please contact our sales team.