Don’t see what you need? We can help.
Ask our experts about a custom magnet for your prototype, invention or specialty project.
..to your best source for incredibly strong neodymium rare earth magnets. If you are new to our site, we're glad you found us. We hope we can fill all of your neodymium rare earth magnet needs.
Magnetic Materials and Grades
BUILD YOUR CUSTOM MAGNETS
There are a number of major families of permanent magnets available. They range from ferrite, which is low cost and low energy, to rare earth materials, which are more expensive and offer higher performance. Many factors affect the choice of magnetic material, such as operating temperature, size, weight constraints, environmental concerns and required magnetic energy. More information on our specific magnet materials is available through the links below.
| Material | Max Operating Temperature | Max Magnetic Energy Product | Resistance to Demagnetization | |
 | Neodymium Iron Boron (Nd-Fe-B) | 200ºC | 52 MGOe | Very High |
 | Samarium Cobalt (Sm-Co) | 300ºC - 350ºC * | 32 MGOe | Very High |
 | Alnico | 550ºC | 10 MGOe | Low |
 | Ceramic (Hard Ferrite) | 300ºC | 4 MGOe | Moderate |
*view grades for grade-specific information
Magnet Type and their characteristics
| Al-Ni-Co magnets | Ferrite magnets | samarium-cobalt magnets | neodymium magnets | ||
| Residual flux density | Br (kG) | 12 | 4.4 | 11 | 13 |
| Magnetic coercive force | Hcb (kOe) | 0.6 | 3.2 | 6.8 | 12 |
| Hcj (kOe) | - | 3.3 | 7 | 17 | |
| Maximum energy product (BH)max | (MGOe) | 5 | 4.6 | 30 | 40 |
| Temperature coefficient | Br (  ) | -0.02 | -0.18 | -0.03 | -0.11 |
| Curie temperature | Tc | 850 | 460 | 800 | 320 |
Density | d (  ) | 7.3 | 5.0 | 8.4 | 7.5 |
Conversion of si units and conversional units
| Item | SI unit | Conventional unit | Conversion rate |
| Magnetic flux | Wb | Mx | 1 Mx= Wb |
| Magnetomotive force | A | Gilbert | 1 Gilbert=0.795775A |
| Magnetic field strength | A/m | Oe | 1 Oe=79.5775A/m |
| Magnetic coercive force | |||
| Flux density | T(= ) | G | 1 G= T |
| Magnetic energy product | J/ | GOe(=erg/c) | 1 MGOe=7.95775kj/ |
| Magnetic permeability (absolute permeability) | H/m(= ) | G/Oe | 1 G/Oe=1.25664 H/m |
| Specific magnetic permeability | Absolute number | Absolute number | Identical |
Disc Round NdFeB Neodymium Magnets N35 D8x4
Neodymium Disc Magnets,D8x4, Ni-Cu-Ni, Grade_N35
Neodymium Rare Earth Strong Disc Magnets N35 D18x2
Neodymium Disc Magnets,D18x2, Ni-Cu-Ni, Grade_N35
Neodymium Rare Earth Block Magnets N35 50X50X20
Neodymium Block Magnets,50X50X20, Ni-Cu-Ni, Grade_N35
