Permanent Sector SmCo Magnets

Samarium cobalt magnets (also known as SmCo magnets), are extremely powerful permanent magnetS. Part of the rare-earth magnet family

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Samarium Cobalt Permanent Sector SmCo Magnets

High-Performance Magnets with Excellent Temperature Stability

Samarium cobalt magnets (also known as Permanent Sector SmCo Magnets), are extremely powerful permanent magnetS. Part of the rare-earth magnet family, Permanent Sector SmCo Magnets rank similarly in strength to neodymium magnets but have much higher temperature stability and higher coercivity. They can operate at temperatures up to 525°F (300°C). In addition, they have a very high resistance to demagnetization and to corrosion. SmCo magnets are available in numerous shapes, sizes and grades that span a wide range of properties and application requirements.

SmCo Magnetic Materials Properties Data

Samarium Cobalt -Magnetic Properties
Grade	Press¹	Type²	Br (kGauss)	Hc (kOersteds)	Hci (kOersteds)	BHmax (MGOe)	Temperature Coefficients (%/℃)		Maximum Operating Temp @ Pc =2(²)
Grade	Press¹	Type²	Range	Typical	Minimum	Range	of Br	of Hci	(℃)	(°F)
S3410	D	2:17	11,3～12,1	100	100	29～34	-0.03	-0.22	~300	~570
S3320	D	2:17	11,2～12,0	106	200	28～33	-0.04	-0.27	~325	~610
S3310	D	2:17	11,2～12,0	90	100	28～33	-0.04	-0.25	~300	~570
S3120	D	2:17	10,7～11,5	103	200	25～31	-0.04	-0.20	~350	~660
S3018	D	2:17	10,2～11,2	98	180	24～30	-0.04	-0.20	~400	~750
S3007	D	2:17	10,5～11,2	825	700	24～30	-0.04	-0.17	~250	~480
S2909	D	2:17	10,2～11,0	925	900	25～29	-0.03	-0.17	~300	~570
S2809	D	2:17	10,0～10,8	925	900	24～28	-0.03	-0.19	~300	~570

1 D: Die-Pressed, I: Isostatcally-Pressed
2 Type: Sm.Co5 or Sm2C017 types
3 The Maximum Operating Temperature shown here is for magnets operating at a Permeance Coeficient of 2. At the temperatures shown the materal's BH Curve does not develop a knee and is still fairly linear.

Samarium Cobalt-Typical Physical Properties
Density		Bending Strength		Compressive Strength		Electrical Resistivity(Ωm)	Coeff.Of Thermal Expansion⁴		Curie Temperature
(kg/m³)	(Ibs/in³)	(kg/m²)	(Ibs/in²)	(kg/m²)	(Ibs/in²)	Electrical Resistivity(Ωm)	// M	”'M	(℃)	(°F)
8.4x10³	0.30⁴	1.2×10³	1.7×10⁴	9.1x10³	1.3×10⁵	0.8x10^-6	9.2×10^-6	11.8×10^-6	825	1510

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