Samarium Cobalt (SmCo) is a high-performance permanent magnet material made from the rare earth metal samarium and the transition metal cobalt. It is mainly divided into two series: 1:5 type and 2:17 type. Featuring high maximum energy product, strong coercivity, excellent high-temperature resistance, oxidation resistance, and outstanding magnetic stability, it can operate reliably in environments above 300°C. It is widely used in aerospace, precision instruments, microwave devices, and high-end motors.
| Material | Br | Hcb | Hcj | (BH)max | TW | ||||||
| Grade | T | KA/m | KA/m | KJ/m3 | |||||||
| KGs | KOe | KOe | MGOe | ||||||||
| Max | Min | Max | Min | Max | Min | Max | Min | ℃ | |||
| SmCo5 and Sm(Pr)Co | XG18 | 0.92 | 0.82 | 756 | 639 | 1751 | 1194 | 159 | 127 | 250 | |
| 9.2 | 8.2 | 9.5 | 8 | 22 | 15 | 20 | 16 | ||||
| XG20 | 0.95 | 0.87 | 756 | 639 | 1751 | 1194 | 175 | 143 | |||
| 9.5 | 8.7 | 9.5 | 8 | 22 | 15 | 22 | 18 | ||||
| XG22 | 1 | 0.93 | 772 | 660 | 1751 | 1194 | 191 | 159 | |||
| 10 | 9.3 | 9.7 | 8.3 | 22 | 15 | 24 | 20 | ||||
| XG24 | 1.04 | 0.96 | 780 | 660 | 1751 | 1194 | 207 | 175 | |||
| 10.4 | 9.6 | 9.8 | 8.3 | 22 | 15 | 26 | 22 | ||||
| Sm2Co17 | XGS24M | 1.04 | 0.96 | 772 | 318 | 955 | 398 | 207 | 175 | 350 | |
| 10.4 | 9.6 | 9.7 | 4 | 12 | 5 | 26 | 22 | ||||
| XGS24 | 1.04 | 0.96 | 780 | 660 | ≥1194 | 207 | 175 | ||||
| 10.4 | 9.6 | 9.8 | 8.3 | ≥15.0 | 26 | 22 | |||||
| XGS24H | 1.04 | 0.96 | 780 | 660 | ≥1592 | 207 | 175 | ||||
| 10.4 | 9.6 | 9.8 | 8.3 | ≥20.0 | 26 | 22 | |||||
| XGS26M | 1.07 | 1 | 796 | 318 | 955 | 398 | 223 | 191 | |||
| 10.7 | 10 | 10 | 4 | 12 | 5 | 28 | 25 | ||||
| XGS26 | 1.07 | 1 | 820 | 677 | ≥1194 | 223 | 191 | ||||
| 10.7 | 10 | 10.3 | 8.5 | ≥15.0 | 28 | 25 | |||||
| XGS26H | 1.07 | 1 | 820 | 677 | ≥1592 | 223 | 191 | ||||
| 10.7 | 10 | 10.3 | 8.5 | ≥20.0 | 28 | 25 | |||||
| XGS28M | 1.1 | 1.04 | 796 | 318 | 955 | 398 | 239 | 207 | |||
| 11 | 10.4 | 10 | 4 | 12 | 5 | 30 | 26 | ||||
| XGS28 | 1.1 | 1.04 | 820 | 677 | ≥1194 | 239 | 207 | ||||
| 11 | 10.4 | 10.3 | 8.5 | ≥15.0 | 30 | 26 | |||||
| XGS28H | 1.1 | 1.04 | 820 | 677 | ≥1592 | 239 | 207 | ||||
| 11 | 10.4 | 10.3 | 8.5 | ≥20.0 | 30 | 26 | |||||
| XGS30M | 1.12 | 1.07 | 796 | 318 | 955 | 398 | 247 | 223 | |||
| 11.2 | 10.7 | 10 | 4 | 12 | 5 | 31 | 28 | ||||
| XGS30 | 1.12 | 1.07 | 820 | 677 | ≥1194 | 247 | 223 | ||||
| 11.2 | 10.7 | 10.3 | 8.5 | ≥15.0 | 31 | 28 | |||||
| XGS32M | 1.15 | 1.09 | 796 | 318 | 955 | 398 | 262 | 238 | |||
| 11.5 | 10.9 | 10 | 4 | 12 | 5 | 32 | 29 | ||||
| XGS32 | 1.15 | 1.09 | 820 | 677 | ≥955 | 262 | 238 | ||||
| 11.5 | 10.9 | 10.3 | 8.5 | ≥12.0 | 32 | 29 | |||||
| Low Temp. Coeff Sm2Co17 | XGL22LT | 1 | 0.93 | 756 | 677 | ≥1194 | 191 | 159 | 350 | ||
| 10 | 9.3 | 9.5 | 8.5 | ≥15.0 | 24 | 20 | |||||
| XGL24LT | 1.04 | 0.96 | 756 | 677 | ≥1194 | 207 | 175 | ||||
| 10.4 | 9.6 | 9.5 | 8.5 | ≥15.0 | 26 | 22 | |||||
| XGL26LT | 1.07 | 1 | 812 | 677 | ≥1433 | 223 | 191 | ||||
| 10.7 | 10 | 10.2 | 8.5 | ≥18.0 | 28 | 25 | |||||
Samarium Cobalt (SmCo) is a high-performance permanent magnet material primarily composed of rare earth samarium and metallic cobalt. It features high maximum energy product, strong coercivity, excellent high-temperature resistance, and outstanding magnetic stability. It is widely used in aerospace, precision instruments, high-end motors, and other advanced applications.
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