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Magnetic Materials and Grades
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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 |
Neodymium Super Bar Magnets N35 20X10X3
Neodymium Block Magnets,20X10X3, Ni-Cu-Ni, Grade_N35
Rectangular Block Magnet Neodymium N35 40X20X10
Neodymium Block Magnets,40X20X10, Ni-Cu-Ni, Grade_N35
Neodymium Super Bar Magnets N35 40X10X5
Neodymium Block Magnets,40X10X5, Ni-Cu-Ni, Grade_N35
