Super Permanent Strong Samarium Cobalt SmCo Magnets 
Description Of Super Permanent Strong Samarium Cobalt SmCo Magnets
Permanent strong Samarium Cobalt Magnets are made of Sintered SmCo Magnet, Samarium-Cobalt, 35% Sm, 60% Co with the balance being Fe & Cu.
There are two compositions of magnets in this family: Sm1Co5 and Sm2Co17. The highest commercially available energy products of Sm2Co17 are in the 30MGOe range.
1:5 alloy material
1:5 offers 16 MGOe (energy product) to 22 MGOe and is made up of approximately 50% samarium and 50% cobalt. The 1:5 series has a maximum recommended operating temperature of 250°C. SmCo 1:5 magnets require lower field strengths than 2:17 materials to magnetize. In some instances, 1:5 material may be magnetized with multiple poles, provided that a magnetizing fixture is available.
2:17 alloy material
2:17 offers 24 MGOe to 32 MGOe and is composed of about 25% samarium, 5% copper, 18% iron, 2% hafnium or zirconium, with the remainder being cobalt. The 2:17 series of has a maximum operating temperature of 350°C. Special grades of 2:17 are available which can operate to even higher temperatures. SmCo 2:17 requires extremely high magnetizing fields, and multiple pole magnetization is not possible.
Samarium Cobalt (SmCo) magnets are powerful magnets rare earth magnets composed of samarium and cobalt. They are commonly used in high performance motors, magnetic couplings and magnetic separators. These are brittle magnets and are prone to cracking and chipping. Samarium magnets can be used for high temperature applications where neodymium will not work.
Features of Super Permanent Strong Samarium Cobalt SmCo Magnets
• Samarium cobalt magnets are hard and brittle and may chip or break if dropped.
• They have high magnetic properties.
• Samarium cobalt magnets offer good thermal stability.
• Samarium cobalt magnets are resistant to corrosion.
• Samarium cobalt magnets resistant to demagnetization.
Super Permanent Strong Samarium Cobalt SmCo Magnets Size Range:
Samarium Cobalt Magnet Grades of SmCo 5(Sintered SmCo Magnet) 
Samarium Cobalt Magnet Grades of SmCo 17(Sintered SmCo Magnet)
Process Of Super Permanent Strong Samarium Cobalt SmCo Magnets 
Physical Feature Of Super Permanent Strong Samarium Cobalt SmCo Magnets
Sintered Smco Physical Feature | |||
Parameter Name | Unit | SmCo 1:5 | SmCo 2:17 |
Density | G/cm3 | 8.3 | 8.4 |
Curie Temperature Tc | K | 1000 | 1100 |
Vickers Hardness Hv | MPa | 450-500 | 550-600 |
Compressive Strength | MPa | 1000 | 800 |
Electrical Resistivity ρ | Ω.cm | 5~6×10-5 | 8~9×10-5 |
Bending Strength | Mpa | 150-180 | 130-150 |
Tensile Strength | Mpa | 400 | 350 |
Thermal Expansion Coefficient | (10-6/℃) | 6⊥12 | 8⊥11 |
Magnetic field strength H(min) of Super Permanent Strong Samarium Cobalt SmCo Magnets
Materials | SmCo1:5 | SmCo1:5 | SmCo2:17 | SmCo2:17 | Ce(co,Fe,cu)5 |
Hcj Scope | HCj≥1194 | HCj ≤ 1433 | HCj ≥ 1433 | HCj ≤1273 | HCj ≤800 |
Demagnetizing curve of SmCo5 and Sm2Co17 Samarium Cobalt SmCo Magnets: 
Difference between Neodymium and SmCo magnets:
Comparison of NdFeB and SmCo Magnets | ||
Property | Neodymium | SmCo |
Remanence (T) | 1–1.3 | 0.82–1.16 |
Coercivity (MA/m) | 0.875–1.99 | 0.493–1.59 |
Relative permeability | 1.05 | 1.05 |
Temperature coefficient of remanence (%/K) | −0.12 | −0.03 |
Temperature coefficient of coercivity (%/K) | −0.55..–0.65 | −0.15..–0.30 |
Curie temperature (°C) | 320 | 800 |
Density (g/cm3) | 7.3–7.5 | 8.2–8.4 |
CTE, magnetizing direction (1/K) | 5.2×10−6 | 5.2×10−6 |
CTE, normal to magnetizing direction (1/K) | −0.8×10−6 | 11×10−6 |
Flexural strength (N/mm2) | 250 | 150 |
Compressive strength (N/mm2) | 1100 | 800 |
Tensile strength (N/mm2) | 75 | 35 |
Vickers hardness (HV) | 550–650 | 500–650 |
Electrical resistivity (Ω·cm) | (110–170)×10−6 | 86×10−6 |
Certificates of SmCo5 and Sm2Co17 Samarium Cobalt SmCo Magnets: 
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