Neodymium Magnet Grades
Description
12 Years' Professional Rare Earth Magnet Manufacturer
Material: Sintered Neodymium Magnets
When selecting an NdFeB grade, keep in mind that the higher the grade (lower in the chart) the more brittle the magnets will be. Operating Temperatures are grouped by color for ease of reading. When selecting a working temperature, make sure you will not reach or exceed the Tmax value in the chart, or the magnets will be damaged.
| Grade | Br (KG) | Hcb (KOe) | Hci (KOe) | BHmax (MGOe) | Tmax |
| N35 | 11.7-12.2 | ?10.9 | ?12.0 | 33-36 | 80°C / 176°F |
| N38 | 12.2-12.5 | ?10.9 | ?12.0 | 36-39 | 80°C / 176°F |
| N40 | 12.5-12.8 | ?11.4 | ?12.0 | 38-41 | 80°C / 176°F |
| N42 | 12.8-13.2 | ?11.5 | ?12.0 | 40-43 | 80°C / 176°F |
| N45 | 13.2-13.8 | ?11.6 | ?12.0 | 43-46 | 80°C / 176°F |
| N48 | 13.8-14.2 | ?11.6 | ?12.0 | 46-49 | 80°C / 176°F |
| N50 | 14.0-14.5 | ?10.0 | ?11.0 | 48-51 | 80°C / 176°F |
| N52 | 14.3-14.8 | ?10.0 | ?11.0 | 50-53 | 80°C / 176°F |
| 30M | 10.8-11.3 | ? 10.0 | ? 14.0 | 28-31 | 100°C / 212°F |
| 33M | 11.3-11.7 | ?10.5 | ?14.0 | 31-33 | 100°C / 212°F |
| 35M | 11.7-12.2 | ?10.9 | ?14.0 | 33-36 | 100°C / 212°F |
| 38M | 12.2-12.5 | ?11.3 | ?14.0 | 36-39 | 100°C / 212°F |
| 40M | 12.5-12.8 | ?11.6 | ?14.0 | 38-41 | 100°C / 212°F |
| 42M | 12.8-13.2 | ?12.0 | ?14.0 | 40-43 | 100°C / 212°F |
| 45M | 13.2-13.8 | ?12.5 | ?14.0 | 43-46 | 100°C / 212°F |
| 48M | 13.6-14.3 | ?12.9 | ?14.0 | 46-49 | 100°C / 212°F |
| 50M | 14.0-14.5 | ?13.0 | ?14.0 | 48-51 | 100°C / 212°F |
| 30H | 10.8-11.3 | ?10.0 | ?17.0 | 28-31 | 120°C / 248°F |
| 33H | 11.3-11.7 | ?10.5 | ?17.0 | 31-34 | 120°C / 248°F |
| 35H | 11.7-12.2 | ?10.9 | ?17.0 | 33-36 | 120°C / 248°F |
| 38H | 12.2-12.5 | ?11.3 | ?17.0 | 36-39 | 120°C / 248°F |
| 40H | 12.5-12.8 | ?11.6 | ?17.0 | 38-41 | 120°C / 248°F |
| 42H | 12.8-13.2 | ?12.0 | ?17.0 | 40-43 | 120°C / 248°F |
| 45H | 13.2-13.8 | ?12.0 | ?17.0 | 43-46 | 120°C / 248°F |
| 48H | 13.7-14.3 | ?12.5 | ?17.0 | 46-49 | 120°C / 248°F |
| 30SH | 10.8-11.3 | ?10.1 | ?20.0 | 28-31 | 150°C / 302°F |
| 33SH | 11.3-11.7 | ?10.6 | ?20.0 | 31-34 | 150°C / 302°F |
| 35SH | 11.7-12.2 | ?11.0 | ?20.0 | 33-36 | 150°C / 302°F |
| 38SH | 12.2-12.5 | ?11.4 | ?20.0 | 36-39 | 150°C / 302°F |
| 40SH | 12.4-12.8 | ?11.8 | ?20.0 | 38-41 | 150°C / 302°F |
| 42SH | 12.8-13.2 | ?12.4 | ?20.0 | 40-43 | 150°C / 302°F |
| 45SH | 13.2-13.8 | ?12.6 | ?20.0 | 43-46 | 150°C / 302°F |
| 28UH | 10.2-10.8 | ?9.6 | 25.0 | 26-29 | 180°C / 356°F |
| 30UH | 10.8-11.3 | ?10.2 | ?25.0 | 28-31 | 180°C / 356°F |
| 33UH | 11.3-11.7 | ?10.7 | ?25.0 | 31-34 | 180°C / 356°F |
| 35UH | 11.8-12.2 | ?10.8 | ?25.0 | 33-36 | 180°C / 356°F |
| 38UH | 12.2-12.5 | ?11.3 | ?25.0 | 36-39 | 180°C / 356°F |
| 40UH | 12.4-12.8 | ?11.3 | ?25.0 | 38-41 | 180°C / 356°F |
| 28EH | 10.4-10.9 | ?9.8 | ?30.0 | 26-29 | 200°C / 392°F |
| 30EH | 10.8-11.3 | ?10.2 | ?30.0 | 28-31 | 200°C / 392°F |
| 33EH | 11.3-11.7 | ?10.5 | ?30.0 | 31-34 | 200°C / 392°F |
| 35EH | 11.7-12.2 | ?11.0 | ?30.0 | 33-36 | 200°C / 392°F |
| 38EH | 12.2-12.5 | ?11.3 | ?30.0 | 36-39 | 200°C / 392°F |
Neodymium (NdFeB) Magnets - Physical Properties
| Curie Temperature (°C) | 310-370 |
| Maximum Operating Temperature (°C) | 80-240 |
| Resistivity (µ ohm.cm) | 160 |
| Hardness (Hv) | 560-580 |
| Density (g/cm3) | 7.40 |
| Relative Recoil Permeability (µrec) | 1.05 |
| Saturation Field Strength, kOe (kA/m) | 30-40 (2400-3200) |
| Temperature Coefficient of Br (%/°C) | -0.12 ~ -0.10 |
| Temperature Coefficient of iHc (%/°C) | -0.6 |
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