Sintered SmCo magnet
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.
The characteristics of Samarium Cobalt Magnet
Very high magnetic properties with good stability
Superior resistance to high temperature, Curie temperature of majority is over 800°C
Excellent corrosion resistance capability, no coating is needed for surface protection
Typical Magnetic Porperties of Samarium Cobalt Materials
Properties of SmCo Permanent Magnet
SmCo Magnet Physical Properties |
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Grade | Residual Flux Density Br | Coercive Force Hcb | Intrinsic Coercive force Hcj | Max. energy product (BH)max |
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| 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 |
Characteristics & Application of permanent SmCo magnet |
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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 |
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Max. Working Temp. | Tmax | °C | 350 | Compress strength | N/m2 | ~8×108 |
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Electrical Resistivity |
| Ω. Cm | ~8.6×10-5 | Tensile strength | N/m2 | ~3.5×107 |
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Vickers Hardness | Hv |
| 500~600 | young's modulus | N/m2 | ~1.2×1011 |
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Thermal Conduct Rate |
| W/mK | ~12 | Magnetization field Ha | kA/m | ≥1600 |
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Typical Characteristic Curve for Samarium Cobalt permanent magnet
