| RARE EARTH MAGNET |
| Item | Unit | Nd-Fe-B | Sm-Co |
| Compositon | — | Nd2•Fe14•B | Sm2Co17 |
| Molding Process | — | Imposing magnetic field on the magnet |
Imposing magnetic field on the magnet |
| Residual Flux Density Br |
mT | 1210 to 1270 | 970 to 1020 |
| kG | 12.1 to 12.7 | 9.7 to 1.02 | |
| Coercive Force bHc |
kA/m | 867 to 979 | 557 to 836 |
| KOe | 10.9 to 12.3 | 7 to10.5 | |
| Intrinsic Coercive Force iHc |
kA/m | >1353 | 716 to 1194 |
| KOe | >17 | 9 to 15 | |
| Maximum Energy Product (BH) max |
kJ/m2 | 278 to 310 | 175 to 199 |
| MGOe | 35 to 39 | 22 to 25 | |
| Temperature Coefficent Br | %/ K | -0.12 | -0.04 |
| Temperature Coefficent iHc | %/ K | -0.58 | -0.03 |
| Curie Point Tc |
K | 593 | 1093 |
| °C | 320 | 820 | |
| Recoil Relative Magnetic Permeability μ rec |
— | 1.05 | 1.05 |
| Density | g/cm2 | 7.4 | 8.3 |
| Deflecting Strength | Mpa | 245 | 118 |
| Kgf/mm2 | 25 | 12 | |
| Compression Strength | MPa | 1050 | 500 to 519 |
| 2 | 107 | 51 to 53 | |
| Tensile Strength | MPa | 44 | 36 |
| Kgf/mm2 | 4.5 | 3.6 | |
| Specific Heat | J/(Kg•K) | 0.50x103 | 034x103 |
| cal/g•°C | 0.12 | 0.08 | |
| Vickers Hardness | HV | 600 | 550 |
| Thermal Expansion Coefficient Vertical |
ppm/K | 5.5 to 7.5 | 8 |
| Thermal Expansion Coefficient Vertical |
ppm/K | -3 to 0.5 | 11 |
| JIS | — | REFe280/120 | RECo160/70 |
| MMPA | — | — | — |
| Magnetic Field To Be Charged For Magnetization |
kA/m | 2400 | 1990 |
| KOe | 30 | 25 | |
| Electric Resistance | nΩ•m | 1.3x10-4 | 0.8 to 0.9 |