Magnets of Samarium-Cobalt (SmCo)
SmCo Magnets belong to the rare earth magnets, their production process is as of neodymium magnets. The availability of it's raw materials Samarium and Cobalt limited and therefore expensive. SmCo magnets are very brittle, their limited mechanical charateristics are counterbalanced by their superior magnetic properties. The materials is resistant to corrosion and is usable in a large temperature area from -40°C up to +250°C. If you need very good magnetical properties in higher temperature environment, SmCo magnets are the best choice.
rings
from ø 10 mm to ø 110 mm
cylinders
from ø 1,5 mm to ø 40 mm
blocks
from 1,5 mm to 100 mm
special designs
according to your requirements
We've got more than 100 different types on stock. Please ask for your requested design and size.
Physical and Chemical Characteristics
| Specification | Unit | SmCo5 | Sm2Co17 |
| rel. Permeability | [up] | 1,05 - 1,1 | 1,0 - 1,1 |
| Temperature coefficient TK(B) | [%/°K] | -0,05 | -0,03 |
| Temperature coefficient TK(Hc) | [%/°K] | -0,2 | -0,2 |
| Saturation field strength Hs | [kA/m] | 2500 | 4000 |
| Max. Curie Temperature | [°C] | 700 - 750 | 800 - 850 |
| Max. working temperature | [°C] | 250* | 300* |
| Density | [g/cm3] | 8,0 - 8,2 | 8,3 - 8,5 |
| Flexual strengthFb | [N/mm2] | 180 | 120 |
| Compressive strength Fp | [N/mm2] | 1000 | 800 |
| Vickers hardness | [Hv] | 400 - 500 | 500 - 600 |
| Specific electric resistance | [Ω · mm2 / m] | 0,5 - 0,6 | 0,75 - 0,85 |
Magnetical Data
| Material | Remanence | Energy Product [kJ/m³] | Coercivity field intensity [kA/m]] | max. working - | |
| Br min/max [mT ] | BHmax min/max | HcB min/max | HcJ min/max | temperature [°C] | |
| SmCo5 | 900/960 | 151/175 | 652/716 | >=1194/1512 | 250 |
| Sm2Co17-175 | 950/1020 | 175/191 | 637/732 | >=1433/1990 | 250 |
| Sm2Co17-200 | 1020/1050 | 191/207 | 748/796 | >=1433/1990 | 250 |
| Sm2Co17-220 | 1050/1080 | 207/223 | 756/796 | >=1433/1831 | 250 |
