General Description

Possessing a unique combination of strong magnetic properties,good anti-corrosion ability and long thermal stability (up to 350°c), Samarium-Cobalt Magnet is ideal for use in devices like servomotors, sensor controls and other equipments which require magnetic properties to be functional at the continuous raised temperature or under easy corrosion circumstance.


Samarium-Cobalt Magnet owns following advantages:
·1. possess strong magnetic properties - 5-7 times more powerful than ferrite
·2.very steady in the conditions capable to cause corrosion
·3.possess stable magnetic properties at high temperatures (to 350°c)


As another kind of rare-earth permanent magnet--Samarium Cobalt(the following called SmCo-magnet) is widely used second generation rare-earth magnetic material. SmCo magnet is made from cobalt and samarium and other rare-earth elements, is a high performance permanent magnet, it exhibits high magnetic performance characteristics in energy and coercive force. There are two compositions of magnets in this family: Sm1Co5 and Sm2Co17. The highest commercially available energy products of Sm2Co 17 are in the 30MGOe range. The 2:17(most popular) offers a better performance & lower temperature coefficient, however it is slightly more expensive and require very high magnetic field to magnetise it.
SmCo-magnet has higher maximum working temperatures than neodymium, although its maximum strengh is less. Its biggest advantage is its high working temperature up to 300 degree centigrade. In the meantime, its higher corrosion and oxidation resistance are also crucial. So SmCo magnets usually need not be plated with other metal. The cost of SmCo material is the most expensive, so SmCo-magnet is recommended only when its performance is a high temperature environment concerned .

Material	Grade	Energy Product BH(max)		Residual Induction Br(min-max)		Coercive Force Hcb(min-max)		Intrinsic Coercive Force Hcj(min-max)		Density	Max work Temp.
		KJ/m3	MGoe	T	KGs	KA/m	KOe	KA/m	KOe	g/cm3	℃
SmCo5	XG16	120-143	15-18	0.77-0.86	7.7-8.6	613-716	7.7-9.0	>1194	>15	8.3	250
	XG16H	120-143	15-18	0.77-0.86	7.7-8.6	613-716	7.7-9.0	>1592	>20
	XG18	135-159	17-20	0.81-0.92	8.1-9.2	637-756	8.0-9.5	>1194	>15
	XG18H	135-159	17-20	0.81-0.92	8.1-9.2	637-756	8.0-9.5	>1592	>20
	XG20	151-175	19-22	0.85-0.95	8.5-9.5	637-756	8.0-9.5	>1194	>15
	XG20H	151-175	19-22	0.85-0.95	8.5-9.5	637-756	8.0-9.5	>1592	>20
	XG22	167-191	21-24	0.89-1.00	8.9-10	661-772	8.3-9.7	>1194	>15
	XG22H	167-191	21-24	0.89-1.00	8.9-10	661-772	8.3-9.7	>1592	>20
Sm2Co17	XGS24M	175-199	22-25	0.92-1.04	9.2-10.4	318-788	4.0-9.9	398-1194	5.0-15.0	8.4	350
	XGS24	175-199	22-25	0.92-1.04	9.2-10.4	661-796	8.3-10.0	1194-1990	15.0-25.0
	XGS24H	175-199	22-25	0.92-1.04	9.2-10.4	661-804	8.3-10.1	1990	25.0
	XGS26M	191-215	24-27	1.00-1.06	10.0-10.6	318-796	4.0-10.0	398-1194	5.0-15.0
	XGS26	191-215	24-27	1.00-1.06	10.0-10.6	677-820	8.5-10.3	1194-1990	15.0-25.0
	XGS26H	191-215	24-27	1.00-1.06	10.0-10.6	677-820	8.5-10.3	1990	25.0
	XGS28M	207-231	26-29	10.4-11.0	10.4-11.0	318-804	4.0-10.1	398-1194	5.0-15.0
	XGS28	207-231	26-29	10.4-11.0	10.4-11.0	677-820	8.5-10.3	1194-1990	15.0-25.0
	XGS28H	207-231	26-29	10.4-11.0	10.4-11.0	677-820	8.5-10.3	1990	25.0
	XGS30M	223-247	28-31	10.7-11.2	10.7-11.2	318-804	4.0-10.1	398-1194	5.0-15.0
	XGS30	223-247	28-31	10.7-11.2	10.7-11.2	700-828	8.8-10.4	1194-1990	15.0-25.0
	XGS30H	223-247	28-31	10.7-11.2	10.7-11.2	700-828	8.8-10.4	1990	25.0
	XGS32M	231-255	29-32	10.9-11.5	10.9-11.5	318-804	4.0-10.1	398-955	5.0-12.0
	XGS32	231-255	29-32	10.9-11.5	10.9-11.5	716-836	9.0-10.5	955	12.0
	XGS22LT	159-183	20-23	9.0-9.9	9.0-9.9	677-756	8.5-9.5	>1194	>15.0
	XGS24LT	159-183	20-23	9.2-10.2	9.2-10.2	677-756	8.5-9.5	>1194	>15.0