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Samarium Cobalt Overview
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Samarium Cobalt Properties

Magnetic Properties
 
Grade Remanence (Gauss) Coercivity (Oersteds) Max. Energy Prod (MGOe) Characteristics
Br Hc min Hci BHmax Tc of Br (%/°C) Tc of Hci (%/°C) Max. Op. Temp.*
S3214 11,600 9,500 14,000 31 -0.03   350
S2818 10,700 10,300 18,000 28 -0.03   350
S2818 11,000 10,300 26,000 28 -0.03   350
S2712 10,600 9,250 11,500 27 -0.03   350
S1809 8,600 7,200 9,000 18 -0.04   250

* Maximum Service Temperature depends on permeance coefficient of magnetic circuit. Temperatures shown here are guidelines only.

Other standard grades also stocked. The above are representative of the span of magnetic properties available.


Scatter plot of Hci versus Br for the grades shown above

 


 

Physical and Thermal Properties

Description Units SmCo 1-5 Alloys SmCo 2-17 Alloys NdFeB
Mechanical Properties
Young's Modulus (106 psi) 23 17 22
(GPa) 158 117 150
Tensile Strength (103 psi) 6 5 12
(MPa) 41 34 83
Density lb/in3 0.296 0.303 0.267
g/cm3 8.2 8.4 7.4
Coefficient of thermal expansion:
Perpendicular to orientation /°C 13 x 10-6 11 x 10-6 -4.8 x 10-6
Parallel to orientation /°C 6 x 10-6 8 x 10-6 3.4 x 10-6
Electrical resistivity  μΩm 0.05 0.86 1.6
General Magnetic Characteristics:
Curie temperature  °C 750 825 310
°F 1,380 1,500 590
Recoil permeability    1.05  1.05 1.05
Max. Operating Temperature (dependent on operating conditions) °C 150 300 150
°F 570 570 300

 

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