Sintered Neodymium Iron Boron (NdFeB)
Sintered Neodymium Iron Boron (NdFeB), or “neo” magnets, is the third generation of permanent magnet developed in the 1980s. It offers the strongest magnetic power today. With its excellent magnetic characteristics Neodymium Magnet offers flexibility for new designs or is replacing older materials like Alnico and Ceramic in many applications, including high performance motors, brushless DC motors,
Sintered Neodymium Iron Boron (NdFeB)
High Anti-corrosion and Low Weight Loss Neodymium Magnet
USA PCT: 121±1℃, 2 atm, 95% RH, 96 hours, weight loss less than 5~10mg/cm2
Europe HAST: 130±2℃, 3 atm, 95% RH, 168 hours, weight loss less than 2~5mg/cm2
Due to special material formulation and manufacturing process, the corrosion resistance is so excellent that neodymium magnet can reach the strict testing requirements above.
Application of Neodymium Magnet
These neodymium magnets are widely used in motor, sensor, elevator, automotive, wind generator, speaker, military and aerospace industries etc.
Performace at high temperature Neodymium Magnet
With higher Hcj value, these neodymium magnet is more stable during high temperature. The tests show that the maximum permanent loss after aging is 5%.
magnetic material grades
NdFeB grades and max operating temp
Grades of Neodymium Magnet
| Grade | Residual Induction (Br) |
Coercive Force (Hcb) |
Intrinsic Coercive Force (Hcj) |
Max Energy Product (BH)max |
Temp. Coefficient Tk |
Max Working Temp. | Curie Temp. | |||||
| T | kGs | kA/m | kOe | kA/m | kOe | kJ/m3 | MGOe | %/˚C (Br) |
%/˚C (Hcj) | ˚C | ˚C | |
| N35-A1 | 0.99-1.05 | 9.9-10.5 | ≥730 | ≥9.2 | ≥780 | ≥9.8 | 176-200 | 22-25 | -0.12 | -0.70 | 60 | 310 |
| N35-A2 | 1.05-1.08 | 10.5-10.8 | ≥780 | ≥9.8 | ≥859 | ≥10.5 | 200-216 | 25-27 | -0.12 | -0.70 | 60 | 310 |
| N35 | 1.17-1.22 | 11.7-12.2 | ≥868 | ≥10.9 | ≥955 | ≥12 | 263-287 | 33-36 | -0.12 | -0.70 | 80 | 310 |
| N38 | 1.22-1.25 | 12.2-12.5 | ≥899 | ≥11.3 | ≥955 | ≥12 | 287-310 | 36-39 | -0.12 | -0.70 | 80 | 310 |
| N40 | 1.25-1.28 | 12.5-12.8 | ≥907 | ≥11.4 | ≥955 | ≥12 | 302-326 | 38-41 | -0.12 | -0.70 | 80 | 310 |
| N42 | 1.28-1.32 | 12.8-13.2 | ≥915 | ≥11.5 | ≥955 | ≥12 | 318-342 | 40-43 | -0.12 | -0.70 | 80 | 310 |
| N45 | 1.32-1.38 | 13.2-13.8 | ≥923 | ≥11.6 | ≥955 | ≥12 | 342-366 | 43-46 | -0.12 | -0.70 | 80 | 310 |
| N48 | 1.38-1.42 | 13.8-14.2 | ≥923 | ≥11.6 | ≥955 | ≥12 | 366-390 | 46-49 | -0.12 | -0.70 | 80 | 310 |
| N50 | 1.40-1.45 | 14.0-14.5 | ≥796 | ≥10.0 | ≥876 | ≥11 | 382-406 | 48-51 | -0.12 | -0.70 | 60 | 310 |
| N52 | 1.43-1.48 | 14.3-14.8 | ≥796 | ≥10.0 | ≥876 | ≥11 | 398-422 | 50-53 | -0.12 | -0.70 | 60 | 310 |
| N55 | 1.46-1.52 | 14.6-15.2 | ≥796 | ≥10.0 | ≥876 | ≥11 | 414-430 | 52-54 | -0.12 | -0.70 | 60 | 310 |
| N35M | 1.17-1.22 | 11.7-12.2 | ≥868 | ≥10.9 | ≥1114 | ≥14 | 263-287 | 33-36 | -0.12 | -0.70 | 100 | 310 |
| N38M | 1.22-1.25 | 12.2-12.5 | ≥899 | ≥11.3 | ≥1114 | ≥14 | 287-310 | 36-39 | -0.12 | -0.70 | 100 | 310 |
| N40M | 1.25-1.28 | 12.5-12.8 | ≥923 | ≥11.6 | ≥1114 | ≥14 | 302-326 | 38-41 | -0.12 | -0.70 | 100 | 310 |
| N42M | 1.28-1.32 | 12.8-13.2 | ≥955 | ≥12.0 | ≥1114 | ≥14 | 318-342 | 40-43 | -0.12 | -0.70 | 100 | 310 |
| N45M | 1.32-1.38 | 13.2-13.8 | ≥995 | ≥12.5 | ≥1114 | ≥14 | 342-366 | 43-46 | -0.12 | -0.70 | 100 | 310 |
| N48M | 1.37-1.43 | 13.7-14.3 | ≥1027 | ≥12.9 | ≥1114 | ≥14 | 366-390 | 46-49 | -0.12 | -0.70 | 100 | 310 |
| N50M | 1.40-1.45 | 14.0-14.5 | ≥1033 | ≥13 | ≥1114 | ≥14 | 382-406 | 48-51 | -0.12 | -0.70 | 100 | 310 |
| N52M | 1.43-1.48 | 14.3-14.8 | ≥1050 | ≥13.2 | ≥1114 | ≥14 | 398-422 | 50-53 | -0.12 | -0.70 | 100 | 310 |
| N55M | 1.46-1.52 | 14.6-15.2 | ≥1066 | ≥13.4 | ≥1114 | ≥14 | 414-430 | 52-54 | -0.12 | -0.70 | 100 | 310 |
| N35H | 1.17-1.22 | 11.7-12.2 | ≥868 | ≥10.9 | ≥1353 | ≥17 | 263-287 | 33-36 | -0.12 | -0.70 | 120 | 310 |
| N38H | 1.22-1.25 | 12.2-12.5 | ≥899 | ≥11.3 | ≥1353 | ≥17 | 287-310 | 36-39 | -0.12 | -0.70 | 120 | 310 |
| N40H | 1.25-1.28 | 12.5-12.8 | ≥923 | ≥11.6 | ≥1353 | ≥17 | 302-326 | 38-41 | -0.12 | -0.70 | 120 | 310 |
| N42H | 1.28-1.32 | 12.8-13.2 | ≥955 | ≥12.0 | ≥1353 | ≥17 | 318-342 | 40-43 | -0.12 | -0.70 | 120 | 310 |
| N45H | 1.32-1.36 | 13.2-13.6 | ≥963 | ≥12.1 | ≥1353 | ≥17 | 342-366 | 43-46 | -0.12 | -0.70 | 120 | 310 |
| N48H | 1.37-1.43 | 13.7-14.3 | ≥995 | ≥12.5 | ≥1353 | ≥17 | 366-390 | 46-49 | -0.12 | -0.70 | 120 | 310 |
| N50H | 1.40-1.45 | 14.0-14.5 | ≥1011 | ≥12.7 | ≥1353 | ≥17 | 382-406 | 48-51 | -0.12 | -0.70 | 120 | 310 |
| N52H | 1.43-1.48 | 14.3-14.8 | ≥1027 | ≥12.9 | ≥1353 | ≥17 | 398-422 | 50-53 | -0.12 | -0.70 | 120 | 310 |
| N55H | 1.46-1.52 | 14.6-15.2 | ≥1035 | ≥13 | ≥1353 | ≥17 | 414-430 | 52-54 | -0.12 | -0.70 | 120 | 310 |
| N35SH | 1.17-1.22 | 11.7-12.2 | ≥876 | ≥11.0 | ≥1592 | ≥20 | 263-287 | 33-36 | -0.11 | -0.65 | 150 | 320 |
| N38SH | 1.22-1.25 | 12.2-12.5 | ≥907 | ≥11.4 | ≥1592 | ≥20 | 287-310 | 36-39 | -0.11 | -0.65 | 150 | 320 |
| N40SH | 1.25-1.28 | 12.5-12.8 | ≥939 | ≥11.8 | ≥1592 | ≥20 | 302-326 | 38-41 | -0.11 | -0.65 | 150 | 320 |
| N42SH | 1.28-1.32 | 12.8-13.2 | ≥987 | ≥12.4 | ≥1592 | ≥20 | 318-342 | 40-43 | -0.11 | -0.65 | 150 | 320 |
| N45SH | 1.32-1.38 | 13.2-13.8 | ≥1003 | ≥12.6 | ≥1592 | ≥20 | 342-366 | 43-46 | -0.11 | -0.65 | 150 | 320 |
| N48SH | 1.37-1.43 | 13.7-14.3 | ≥1027 | ≥12.9 | ≥1592 | ≥20 | 366-390 | 46-49 | -0.11 | -0.65 | 150 | 320 |
| N28UH | 1.04-1.08 | 10.4-10.8 | ≥764 | ≥9.6 | ≥1990 | ≥25 | 207-231 | 26-29 | -0.11 | -0.60 | 180 | 330 |
| N30UH | 1.08-1.13 | 10.8-11.3 | ≥812 | ≥10.2 | ≥1990 | ≥25 | 223-247 | 28-31 | -0.11 | -0.60 | 180 | 330 |
| N33UH | 1.13-1.17 | 11.3-11.7 | ≥852 | ≥10.7 | ≥1990 | ≥25 | 247-271 | 31-34 | -0.11 | -0.60 | 180 | 330 |
| N35UH | 1.17-1.22 | 11.7-12.2 | ≥860 | ≥10.8 | ≥1990 | ≥25 | 263-287 | 33-36 | -0.11 | -0.60 | 180 | 330 |
| N38UH | 1.22-1.25 | 12.2-12.5 | ≥876 | ≥11.0 | ≥1990 | ≥25 | 287-310 | 36-39 | -0.11 | -0.60 | 180 | 330 |
| N40UH | 1.25-1.28 | 12.5-12.8 | ≥899 | ≥11.3 | ≥1990 | ≥25 | 302-326 | 38-41 | -0.11 | -0.60 | 180 | 330 |
| N42UH | 1.28-1.32 | 12.8-13.2 | ≥899 | ≥11.3 | ≥1990 | ≥25 | 318-342 | 40-43 | -0.11 | -0.60 | 180 | 330 |
| N45UH | 1.32-1.36 | 13.2-13.6 | ≥908 | ≥11.4 | ≥1990 | ≥25 | 342-366 | 43-46 | -0.11 | -0.60 | 180 | 330 |
| N48UH | 1.37-1.43 | 13.7-14.3 | ≥908 | ≥11.4 | ≥1990 | ≥25 | 366-390 | 46-49 | -0.11 | -0.60 | 180 | 330 |
| N28EH | 1.04-1.08 | 10.4-10.8 | ≥780 | ≥9.8 | ≥2388 | ≥30 | 207-231 | 26-29 | -0.11 | -0.55 | 200 | 330 |
| N30EH | 1.08-1.13 | 10.8-11.3 | ≥812 | ≥10.2 | ≥2388 | ≥30 | 223-247 | 28-31 | -0.11 | -0.55 | 200 | 330 |
| N33EH | 1.13-1.17 | 11.3-11.7 | ≥836 | ≥10.5 | ≥2388 | ≥30 | 247-271 | 31-34 | -0.11 | -0.55 | 200 | 330 |
| N35EH | 1.17-1.22 | 11.7-12.2 | ≥876 | ≥11.0 | ≥2388 | ≥30 | 263-287 | 33-36 | -0.11 | -0.55 | 200 | 330 |
| N38EH | 1.22-1.25 | 12.2-12.5 | ≥899 | ≥11.3 | ≥2388 | ≥30 | 287-310 | 36-39 | -0.11 | -0.55 | 200 | 330 |
| N40EH | 1.25-1.28 | 12.5-12.8 | ≥899 | ≥11.3 | ≥2388 | ≥30 | 302-326 | 38-41 | -0.11 | -0.55 | 200 | 330 |
| N42EH | 1.28-1.32 | 12.8-13.2 | ≥899 | ≥11.3 | ≥2388 | ≥30 | 318-342 | 40-43 | -0.11 | -0.55 | 200 | 330 |
| N45EH | 1.32-1.36 | 13.2-13.6 | ≥899 | ≥11.3 | ≥2388 | ≥30 | 342-366 | 43-46 | -0.11 | -0.55 | 200 | 330 |
| N48EH | 1.37-1.43 | 13.7-14.3 | ≥899 | ≥11.3 | ≥2388 | ≥30 | 366-390 | 46-49 | -0.11 | -0.55 | 200 | 330 |
| N28AH | 1.04-1.08 | 10.4-10.8 | ≥787 | ≥9.9 | ≥2624 | ≥33 | 207-231 | 26-29 | -0.10 | -0.50 | 230 | 350 |
| N30AH | 1.08-1.13 | 10.8-11.3 | ≥819 | ≥10.3 | ≥2624 | ≥33 | 223-247 | 28-31 | -0.10 | -0.50 | 230 | 350 |
| N33AH | 1.13-1.17 | 11.3-11.7 | ≥843 | ≥10.6 | ≥2624 | ≥33 | 247-271 | 31-34 | -0.10 | -0.50 | 230 | 350 |
| N35AH | 1.17-1.22 | 11.7-12.2 | ≥876 | ≥11.0 | ≥2624 | ≥33 | 263-287 | 33-36 | -0.10 | -0.50 | 230 | 350 |
| N38AH | 1.22-1.25 | 12.2-12.5 | ≥899 | ≥11.3 | ≥2624 | ≥33 | 287-310 | 36-39 | -0.10 | -0.50 | 230 | 350 |
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