Samarium Cobalt holds its standard property in higher maximum temperatures than neodymium, although its maximum strengh is less. The cost of SmCo material is the most expensive, so SmCo magnet is recommended only when its performance is a high temperature environment is a concern.
| Grade | Residual Flux Density Br | Coercive Force Hcb | Intrinsic Coercive force Hcj | Max. energy product (BH)max | ||||
| mT | kGs | kA/m | koe | kA/m | koe | kJ/m3 | MGOe | |
| SmCo-YX6 | 500~600 | 5.0~6.0 | ≥358 | 4.5~5.5 | ≥960 | ≥12.0 | 47~72 | 6~9 |
| SmCo-YX10 | 600~700 | 6.0~7.0 | ≥438 | 5.5~6.5 | ≥1200 | ≥15.0 | 64~88 | 8~11 |
| SmCo-YX12 | 700~750 | 7.0~7.5 | ≥520 | 6.5~7.3 | ≥1591 | ≥20.0 | 96~120 | 12~15 |
| SmCo5-YX16 | 750~880 | 7.5~8.8 | 597±40 | 7.5±0.5 | ≥1591 | ≥20.0 | 127±16 | 16±2 |
| SmCo-YX16A | 750~880 | 7.5~8.8 | 597±40 | 7.5±0.5 | ≥1989 | ≥25.0 | 127±16 | 16±2 |
| SmCo-YX16B | 750~880 | 7.5~8.8 | 597±40 | 7.5±0.5 | ≥2386 | ≥30.0 | 127±16 | 16±2 |
| Sm2Co17-YX18 | 800~930 | 8.0~9.3 | 637±40 | 8.0±0.5 | ≥1194 | ≥15.0 | 143±16 | 18±2 |
| SmCo-YX18A | 800~930 | 8.0~9.3 | 637±40 | 8.0±0.5 | ≥1591 | ≥20.0 | 143±16 | 18±2 |
| SmCo-YX18T | 800~930 | 8.0~9.3 | 637±40 | 8.0±0.5 | ≥1591 | ≥20.0 | 143±16 | 18±2 |
| SmCo-YX18B | 800~930 | 8.0~9.3 | 637±40 | 8.0±0.5 | ≥1989 | ≥25.0 | 143±16 | 18±2 |
| Sm2Co17-YX20 | 900~980 | 9.0~9.8 | 637±40 | 8.0±0.5 | ≥1432 | ≥18.0 | 159±16 | 20±2 |
| SmCo-YX20 | 900~950 | 9.0~9.5 | ≥670 | 8.5~9.2 | ≥1591 | ≥20.0 | 159±16 | 20±2 |
| SmCo-YX20A | 900~980 | 9.0~9.8 | 637±40 | 8.0±0.5 | ≥1989 | ≥25.0 | 159±16 | 20±2 |
| SmCo-YX22 | 900~1030 | 9.0~10.3 | 653±40 | 8.2±0.5 | ≥1432 | ≥18.0 | 175±16 | 22±2 |
| SmCo-YX22A | 900~1030 | 9.0~10.3 | 653±40 | 8.2±0.5 | ≥1989 | ≥25.0 | 175±16 | 22±2 |
| SmCo-YX24 | 950~1080 | 9.5~10.8 | 676±40 | 8.2±0.5 | ≥1432 | ≥18.0 | 191±16 | 24±2 |
| SmCo-YX24A | 1000~1100 | 10.0~11.0 | 676±40 | 8.2±0.5 | ≥1989 | ≥25.0 | 191±16 | 24±2 |
| SmCo-YX26 | 1000~1130 | 10.0~11.3 | 357~516 | 4.5~6.5 | 413~556 | 5.0~7.0 | 207±16 | 26±2 |
| YX26A | 1000~1130 | 10.0~11.3 | 716±40 | 9.0±0.5 | ≥796 | ≥10.0 | 207±16 | 26±2 |
| YX26B | 1000~1130 | 10.0~11.3 | 716±40 | 9.0±0.5 | ≥1194 | ≥15.0 | 207±16 | 26±2 |
| YX26C | 1000~1130 | 10.0~11.3 | 716±40 | 9.0±0.5 | ≥1591 | ≥20.0 | 207±16 | 26±2 |
| YX26D | 1000~1080 | 10.0~10.8 | ≥732 | 9.0~10.5 | ≥2300 | ≥30.0 | 207±16 | 26±2 |
| SmCo-YX28 | 1060~1180 | 10.6~11.8 | 357~516 | 4.5~6.5 | 413~556 | 5.0~7.0 | 223±16 | 28±2 |
| SmCo-YX28A | 1060~1180 | 10.6~11.8 | 763±40 | 9.6±0.5 | ≥796 | ≥10.0 | 223±16 | 28±2 |
| SmCo-YX28B | 1050~1150 | 10.5~11.5 | ≥750 | 9.4~9.8 | ≥960 | ≥12.0 | 223±16 | 28±2 |
| SmCo-YX28C | 1060~1180 | 10.6~11.8 | 763±40 | 9.6±0.5 | ≥1194 | ≥15.0 | 223±16 | 28±2 |
| SmCo-YX30 | 1100~1200 | 11.0~12.0 | 438~597 | 5.5~6.5 | 454~597 | 5.7~7.5 | 238±16 | 30±2 |
| SmCo-YX30A | 1100~1200 | 11.0~12.0 | ≥560 | 7.0~8.5 | ≥716 | ≥12.0 | 238±16 | 30±2 |
| Curie Temp. | Tc | °C | 800~850 | Coeff. of thermal expansion | C // | 1/°C | ~8×10-5 |
| Density | D | g/cm3 | 8.3~8.5 | C⊥ | 1/°C | ~11×10-5 | |
| Recoil Permeability | µrec | 1.00~1.05 | Regidity strength | N/m2 | ~1.5×108 | ||
| Max. Working Temp. | Tmax | °C | 350 | Compress strength | N/m2 | ~8×108 | |
| Electrical Resistivity | Ω. Cm | ~8.6×10-5 | Tensile strength | N/m2 | ~3.5×107 | ||
| Vickers Hardness | Hv | 500~600 | young's modulus | N/m2 | ~1.2×1011 | ||
| Thermal Conduct Rate | W/mK | ~12 | Magnetization field Ha | kA/m | ≥1600 | ||
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