Samarium Cobalt (SmCo) Magnet Material Specs & Technical Data
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Samarium Cobalt (SmCo) magnets are produced in both sintered and bonded forms and provide energy products ranging from 18 to 30 MGOe. Known for high Curie temperatures, excellent thermal stability, and low temperature coefficients, SmCo materials are often selected for demanding high-temperature applications. Due to their high cobalt content, these magnets offer reliable performance but come at a higher material cost.
Please refer to the table below for sintered SmCo materials specs. Click any grade to view its demagnetization (B-H) curve.
Download Sintered SmCo Materials Chart (PDF) - click here
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Read our blog article — Understanding Magnet Grades & Magnet Tables
| Grade | Remanence | Coercivity | Max Energy Product | Temperature Coefficient |
Max Working Temperature |
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Br | HcB | HcJ | (BH)max | α(Br) | β(HcJ) | TwMax | |||||
| T | kGs | kA/m | kOe | kA/m | kOe | kJ/m³ | MGOe | %/°C | %/°C | °C | |
| Sm1Co5 | |||||||||||
| SmCo-20 | 0.89-0.93 | 8.9-9.3 | 684-732 | 8.6-9.2 | ≥1830 | ≥23 | 150-167 | 19-21 | -0.045 | -0.28 | 250 |
| SmCo-22 | 0.92-0.96 | 9.2-9.6 | 710-756 | 8.9-9.5 | ≥1830 | ≥23 | 167-183 | 21-23 | -0.045 | -0.28 | 250 |
| SmCo-24 | 0.96-1.00 | 9.6-10.0 | 740-788 | 9.3-9.9 | ≥1830 | ≥23 | 183-199 | 23-25 | -0.045 | -0.28 | 250 |
| Sm2Co17 | |||||||||||
| SmCo-30L | 1.08-1.15 | 10.8-11.5 | 541-796 | 6.8-10.0 | 636-955 | 8-12 | 220-240 | 28-30 | -0.035 | -0.20 | 250 |
| SmCo-32L | 1.10-1.15 | 11.0-11.5 | 541-812 | 6.8-10.2 | 636-955 | 8-12 | 230-255 | 29-32 | -0.035 | -0.20 | 250 |
| SmCo-30M | 1.08-1.10 | 10.8-11.0 | 676-835 | 8.5-10.5 | 955-1433 | 12-18 | 220-240 | 28-30 | -0.035 | -0.20 | 300 |
| SmCo-32M | 1.10-1.13 | 11.0-11.3 | 676-852 | 8.5-10.7 | 955-1433 | 12-18 | 230-255 | 29-32 | -0.035 | -0.20 | 300 |
| SmCo-28 | 1.03-1.08 | 10.3-10.8 | 756-812 | 9.5-10.2 | ≥1433 | ≥18 | 207-220 | 26-28 | -0.035 | -0.20 | 300 |
| SmCo-30 | 1.08-1.10 | 10.8-11.0 | 788-835 | 9.9-10.5 | ≥1433 | ≥18 | 220-240 | 28-30 | -0.035 | -0.20 | 300 |
| SmCo-32 | 1.10-1.13 | 11.0-11.3 | 812-860 | 10.2-10.8 | ≥1433 | ≥18 | 230-255 | 29-32 | -0.035 | -0.20 | 300 |
| SmCo-28H | 1.03-1.08 | 10.3-10.8 | 756-812 | 9.5-10.2 | ≥1990 | ≥25 | 207-220 | 26-28 | -0.035 | -0.20 | 350 |
| SmCo-30H | 1.08-1.10 | 10.8-11.0 | 788-835 | 9.9-10.5 | ≥1990 | ≥25 | 220-240 | 28-30 | -0.035 | -0.20 | 350 |
| SmCo-32H | 1.10-1.13 | 11.0-11.3 | 812-860 | 10.2-10.8 | ≥1990 | ≥25 | 230-255 | 29-32 | -0.035 | -0.20 | 350 |
| SmCo-33H | 1.13-1.15 | 11.3-11.5 | 830-880 | 10.4-11 | ≥1990 | ≥25 | 246-262 | 31-32 | -0.039 | -0.22 | 350 |
| SmCo-35H | 1.16-1.20 | 11.6-12.0 | 852-899 | 10.7-11.3 | ≥1990 | ≥25 | 255-271 | 32-34 | -0.039 | -0.25 | 300 |