Magnet physical properties is a good reference value when you choosing a magnet material from NdFeB, SmCo, AlNiCo and Ferrite Magnets. Different materials have different properties. If you can’t find the information you want here, please feel free to contact us.
Magnet Physical Properties
Parameter | Unit | Sintered NdFeB Magnet Standard Data | |
| Curie Temprature | ℃ | 320-395 | increase from N series to AH series |
| Max. Operating Temperature | ℃ | 70-250 | increase from N series to AH series |
| Resistivity | μΩ.cm | 120-160 | |
| Thermal Conductivity | W/M.C | 7.0-10.0 | |
| Hardness | HV | 560-650 | increase from N series to AH series |
| Density | G/Cm³ | 7.4-7.7 | increase from N series to AH series |
| Recoil Permeability | 1.02-1.08 | increase from N series to AH series | |
| Saturation Magnetization | KOe | 30-40 | increase from N series to AH series |
| Temperature Coefficient of Br. | %/℃ (20℃ -250℃ ) | -(0.08-0.12) | increase from N series to AH series |
| Temperature Coefficient of iHc | %/℃ (20℃ -250℃ ) | -(0.34-0.75) | increase from N series to AH series |
| Compressive Strength | N/Mm² | 1000-1300 | |
| Bending Srength | N/Mm² | 250-400 | |
| Young’s Modulus | KN/Mm² | 150-160 | |
| Elongation | % | ~0 | |
Parameter | Unit | Injection Bonded Ferrite Magnet Standard Data | Bonded NdFeB Magnet Standard Data |
| Curie Temprature | ℃ | 450 | 310 |
| Max. Operating Temperature | ℃ | 120 | 110-150 |
| Density | G/Cm³ | 3.4-3.7 | 5.8-6.2 |
| Recoil Permeability | μ rec | 1.3 | 1.15-1.22 |
| Saturation Magnetization | Koe | 10 | >25 |
| KA/m | 800 | ≥2000 | |
| Temperature Coefficient of Br. | %/℃ | -0.2 | -0.07 to -0.13 |
Parameter | Unit | Sm1Co5 Standard Data | Sm2Co17 Standard Data |
| Curie Temprature | ℃ | 700 | 800 |
| Max. Operating Temperature | ℃ | 250 | 350 |
| Resistivity | μΩ.cm | 50-60 | 80-90 |
| Hardness | Hv | 150-500 | 500-600 |
| Density | g/cm3 | 8.3 | 8.4 |
| Recoil Permeability | μ rec | 1.1 | 1.1 |
| Saturation Magnetization | Koe | >37.5 | >25 |
| KA/m | >3000 | ≥2000 | |
| Temperature Coefficient of Br. | %/℃ | -(0.05-0.03) | |
| Temperature Coefficient of iHc | %/℃ | -(0.25-0.19) | |
| Tensile Strength | N/mm2 | 400 | 350 |
| Compressive strength | N/mm2 | 1000 | |
| Bending strength | N/mm2 | 150-180 | 130-150 |
| coefficient of thermal expansion (20 to 200℃) | 10-6/k | ∥ 7 ⊥ 15 | ∥ 11⊥ 13 |
| Specific Heat | J/(Kg.K) | 370 | 350 |
| Thermal Conductivity | W/(m.K) | 11 | 10 |
| Young’s Modulus | MPa | ~1.3×105 | ~2.0×105 |
| Elasticity Modulus | MPa | ~1.59×105 | ~1.17×105 |
Parameter | Mark | Unit | Ferrite Standard Data |
| Recoil Permeability | μ rec | Gs/Oe | 1.05-1.3 |
| Curie Temprature | Tc | ℃ | 450 |
| The coefficient of demagnetization to temperature | α (Br) | ℃-1 | -0.2% (0-100℃) |
| The coefficient of magnetization coercive force to temperature | α (Hc) | ℃-1 | 0.2% -5% (0-100℃) |
| Density | d | g/cm3 | 4.7-5.0 |
| Resistivity | ρ | Ω.cm | ≥ 106 |
| The coefficient of linear expansion | α | ℃-1 | 7-15 x 10-6 |
| Hardness | Hv / – | – | 480-580 |
Parameter | Mark | Unit | AlNiCo Standard Data |
| Density | d | g/cm3 | 6.9-7.3 |
| Vickers Hardness | Hv | D.P.N | 520-700 |
| Compression Strength | C.S | N/mm2 | 300-400 |
| Coefficient Of Thermal Expansion | C// | 10-6/°C | 11.5-13 |
| Electric Resistance | r | micro Ω.cm | 45-70 |
| Tensile Strength | σUTS, or SU | kg/mm2 | 20 – 450 (37 ACA44) |
| Curie Temprature | Tc | ℃ | 810-860 |
| Transverse Modulus of Rupture | – | N/mm2 | 50-690 |
| Specific Heat | – | J/(kg.k) | 350-450 |
| Specific Thermal Conductivity | – | W/m.k | 10-100 |
| Saturation Field Strength | – | kA/M | 180-750 |