Similarly to recently very popular neodymium magnets (NdFeB magnets), also samarium magnets (SmCo) belong to the strongest magnets. Their power is almost comparable with the power of neodymium magnets.

On-line sale of SmCo magnets

Choose the magnet shape and the way of magnetizing

Main benefits of samarium magnets

However, on contrary to neodymium magnets, they are characterized with one very remarkable positive feature, i.e. their temperature resistance. The temperature resistance may be even up to 300 °C (in neodymium magnets this is 200 °C at maximum).

Another great strength of these magnets consists in their resistance against corrosion without a need of a surface treatment - therefore the SmCo magnets are supplied without any surface treatment.

Composition of the SmCo magnet

According to the ratio of main elements contained in these magnets, samarium - Sm and cobalt, Co, we divide them into two main types: SmCo5 and Sm2Co17.

Magnets comparison table

	Ferrite isotropic	Ferrite anisotropic	Rare-earth	SmCo
Price
Force
Temperature resistance
Chemical resistance

 

In the following table you may choose the magnetic and physical properties of SmCo materials that will suit you most.

Magnetic properties (at the temperature of 20 °C)

Tyep	Residual Induction (Br)		Coercive Force (Hcb)		Intrinsic Coercive Force (Hcj)		Max. Energy Product (BH max)		Curie temp..
	mT	kGs	kA/m	kOe	kA/m	kOe	kJ/m³	MGOe	°C
SmCo5(SmPr)Co5
YX-16	0.81-0.85	8.1-8.5	620-660	7.8-8.3	1194-1830	15-23	110-127	14-16	750
YX-18	0.85-0.90	8.5-9.0	660-700	8.3-8.8	1194-1830	15-23	127-143	16-18	750
YX-20	0.90-0.94	9.0-9.4	676-725	8.5-9.1	1194-1830	15-23	150-167	19-21	750
YX-22	0.92-0.96	9.2-9.6	710-748	8.9-9.4	1194-1830	15-23	160-175	20-22	750
YX-24	0.96-1.00	9.6-10.0	730-770	9.2-9.7	1194-1830	15-23	175-190	22-24	750
SmCo5
YX-16s	0.79-0.84	7.9-8.4	620-660	7.8-8.3	≥1830	≥23	118-135	15-17	750
YX-18s	0.84-0.89	8.4-8.9	660-700	8.3-8.8	≥1830	≥23	135-151	17-19	750
YX-20s	0.89-0.93	8.9-9.3	684-732	8.6-9.2	≥1830	≥23	150-167	19-21	750
YX-22s	0.92-0.96	9.2-9.6	710-756	8.9-9.5	≥1830	≥23	167-183	21-23	750
YX-24s	0.96-1.00	9.6-10.0	740-788	9.3-9.9	≥1830	≥23	183-199	23-25	750
SmCo5 (SmGd)Co5
LTc (YX-10)	0.62-0.66	6.2-6.6	485-517	6.1-6.5	≥1830	≥23	75-88	9.5-11	750
Ce(CoFeCu)5
YX-12	0.70-0.74	7.0-7.4	358-390	4.5-4.9	358-478	4.5-6	80-103	10-13	450
Sm2Co17 Sm2(CoFecuzr)17
YXG-24H	0.95-1.02	9.5-10.2	692-764	8.7-9.6	≥1990	≥25	175-191	22-24	800
YXG-26H	1.02-1.05	10.2-10.5	748-796	9.4-10.0	≥1990	≥25	191-207	24-26	800
YXG-28H	1.03-1.08	10.3-10.8	756-812	9.5-10.2	≥1990	≥25	207-220	26-28	800
YXG-30H	1.08-1.10	10.8-11.0	788-835	9.9-10.5	≥1990	≥25	220-240	28-30	800
YXG-32H	1.10-1.13	11.0-11.3	812-860	10.2-10.8	≥1990	≥25	230-255	29-32	800
YXG-22	0.93-0.97	9.3-9.7	676-740	8.5-9.3	≥1433	≥18	160-183	20-23	800
YXG-24	0.95-1.02	9.5-10.2	692-764	8.7-9.6	≥1433	≥18	175-191	22-24	800
YXG-26	1.02-1.05	10.2-10.5	748-796	9.4-10.0	≥1433	≥18	191-207	24-26	800
YXG-28	1.03-1.08	10.3-10.8	756-812	9.5-10.2	≥1433	≥18	207-220	26-28	800
YXG-30	1.08-1.10	10.8-11.0	788-835	9.9-10.5	≥1433	≥18	220-240	28-30	800
YXG-32	1.10-1.13	11.0-11.3	812-860	10.2-10.8	≥1433	≥18	230-255	29-32	800
YXG-26M	1.02-1.05	10.2-10.5	676-780	8.5-9.8	955-1433	12-18	191-207	24-26	800
YXG-28M	1.03-1.08	10.3-10.8	676-796	8.5-10.0	955-1433	12-18	207-220	26-28	800
YXG-30M	1.08-1.10	10.8-11.0	676-835	8.5-10.5	955-1433	12-18	220-240	28-30	800
YXG-32M	1.10-1.13	11.0-11.3	676-852	8.5-10.7	955-1433	12-18	230-255	29-32	800
YXG-24L	0.95-1.02	9.5-10.2	541-716	6.8-9.0	636-955	8.12	175-191	22-24	800
YXG-26L	1.02-1.05	10.2-10.5	541-748	6.8-9.4	636-955	8.12	191-207	24-26	800
YXG-28L	1.03-1.08	10.3-10.8	541-764	6.8-9.6	636-955	8.12	207-220	26-28	800
YXG-30L	1.08-1.15	10.8-11.5	541-796	6.8-10.0	636-955	8.12	220-240	28-30	800
YXG-32L	1.10-1.15	11.0-11.5	541-812	6.8-10.2	636-955	8.12	230-255	29-32	800
Sm2Co17 (SmEr)2（CoTM)17
LTC (YXG-22)	0.94-0.98	9.4-9.8	668-716	8.4-9.0	≥1433	≥18	167-183	21-23	840

Download

• The magnetic characteristics of samarium-cobalt magnets (PDF)