Magnets of Samarium-Cobalt (SmCo)

SmCo Magnets belong to the rare earth magnets, their production process is as of neodymium magnets. The availability of it's raw materials Samarium and Cobalt limited and therefore expensive. SmCo magnets are very brittle, their limited mechanical charateristics are counterbalanced by their superior magnetic properties. The materials is resistant to corrosion and is usable in a large temperature area from -40°C up to +250°C. If you need very good magnetical properties in higher temperature environment, SmCo magnets are the best choice.

rings

from ø 10 mm to ø 110 mm

cylinders

from ø 1,5 mm to ø 40 mm

blocks

from 1,5 mm to 100 mm

special designs

according to your requirements

We've got more than 100 different types on stock. Please ask for your requested design and size.

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Physical and Chemical Characteristics

Specification	Unit	SmCo5	Sm2Co17

rel. Permeability	[up]	1,05 - 1,1	1,0 - 1,1
Temperature coefficient TK(B)	[%/°K]	-0,05	-0,03
Temperature coefficient TK(Hc)	[%/°K]	-0,2	-0,2
Saturation field strength Hs	[kA/m]	2500	4000
Max. Curie Temperature	[°C]	700 - 750	800 - 850
Max. working temperature	[°C]	250*	300*
Density	[g/cm³]	8,0 - 8,2	8,3 - 8,5
Flexual strengthFb	[N/mm²]	180	120
Compressive strength Fp	[N/mm²]	1000	800
Vickers hardness	[Hv]	400 - 500	500 - 600
Specific electric resistance	[Ω · mm² / m]	0,5 - 0,6	0,75 - 0,85

Magnetical Data

Material	Remanence	Energy Product [kJ/m³]	Coercivity field intensity [kA/m]]		max. working -
	Br min/max [mT ]	BHmax min/max	HcB min/max	HcJ min/max	temperature [°C]
SmCo5	900/960	151/175	652/716	>=1194/1512	250
Sm2Co17-175	950/1020	175/191	637/732	>=1433/1990	250
Sm2Co17-200	1020/1050	191/207	748/796	>=1433/1990	250
Sm2Co17-220	1050/1080	207/223	756/796	>=1433/1831	250