Rare Earth SmCo Magnets

Rare earth samarium-cobalt magnet（shorted as SmCo magnet）is a kind of rare earth magnet for high temperature resistance. It is a kind of functional magnetic material made of samarium, cobalt and other metal rare earth materials by mixing, melting, grinding, pressing and sintering. SmCo magnets are classified as Sm1Co5 and Sm2Co17 according the composition ratios of samarium and cobalt.

SmCo Disc Magnets

Samarium cobalt(SmCo) disc magnets are made of an alloy of samarium and cobalt. They have strong magnetic strength like as neodymium disc magnets.The reason why SmCo disc magnets are widely used is th...

SmCo Block Magnets

Samarium cobalt(SmCo) block magnets （also known as rare earth block magnets）are made of an alloy of samarium and cobalt,which also have strong magnetic force like as neodymium block magnets. Because of their ...

SmCo Bar Magnets

The long rare earth SmCo block magnets are called as SmCo bar magnets.Rare Earth samarium cobalt (SmCo) block bar magnets can be used in high temperature environment or applications with demagnetizati...

SmCo Cylinder(rod) Magnets

The cylindrical SmCo magnet with a thickness that’s equal to or larger than their diameter known as samarium cobalt (SmCo) cylinder or rod magnets.Samarium cobalt(SmCo) cylinder magnets are made of a...

SmCo Ring Magnets

The ring shape magnets on the page are made of rare earth Samarium-Cobalt(SmCo) material,which shorted as rare earth Samarium-Cobalt(SmCo) ring magnets. SmCo ring magnets are important ...

SmCo Rectangular Magnets

SmCo rectangular(Rectangle) magnets offer excellent rust resistance to water because of little free iron being present in its structure. Due to its brittle nature,care should be taken when assembling...

SmCo Arc Magnets

The rare earth arc magnets on this page are made from the rare earth magnetic material samarium and cobalt. Samarium cobalt arc magnet is the second strong magnetic material behind neodymium,and widel...

SmCo Countersunk Ring Magnet

Rare earth SmCo countersunk ring magnets have very high coercivity, which means they are not easy to demagnetize. SmCo countersunk ring magnets are known by their ability to work at temperatures up to...

Square SmCo Magnets

Rare earth samarium cobalt (SmCo) magnets are often used in applications with high temperature ,which need high magnetic performance and where magnetic stability over a wide range of ...

Application of rare earth samarium-cobalt（SmCo )magnets

Due to strong corrosion resistance and oxidation resistance, samarium-cobalt magnet(SmCo magnets) are widely used in aerospace, national defense and military industry, microwave devices, communication, medical equipment, instruments, meters, various magnetic transmission devices, sensors, magnetic processors, motors, magnetic cranes, etc.

Advantages of samarium-cobalt（SmCo）rare earth magnets

SmCo magnets have high magnetic energy product,the maximum magnetic energy product of samarium-cobalt(SmCo) magnets ranges from 16MGOe to 32MGOe, and its theoretical limit is 34MGOe. SmCo magnets also known as strong rare earth magnets.

SmCo magnets have extremely low temperature coefficient. The maximum working temperature can reach 350 ℃ and the negative temperature is unlimited. When the working temperature is above 180 ℃, all of the maximum magnetic energy product (BHmax), coercivity, temperature stability and chemical stability are better than those of neodymium-iron-boron.

SmCo magnets have strong corrosion resistance and oxidation resistance,surface treatment not needed for SmCo.

Disadvantages of rare earth samarium cobalt（SmCo） magnets

Samarium-cobalt magnets are easy to peel. Goggles must be worn when handling them.

SmCo magnets are made by a process called sintering, and sintering of all materials. cracks are very likely to occur inside

The machining performance of SmCo magnet is poor,small corners are easy to be produced because of slight collision during the process of production,packing, and transportation.

Magnetic properties of samarium-cobalt magnets(SmCo magnets)

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.
Material	Grade	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

Friendly reminding for ordering rare earth SmCo magnets:

SmCo(1:5) magnets have better mechanical and physical properties than SmCo(2:17) magnets, which is slightly easier to process

If SmCo magnets are used in acid-base environment and another bad environment, electroplating treatment can be adopted on the them, Nickel-coated SmCo magnets, Zinc-coated SmCo magnets, Epoxy-coated SmCo magnets etc can be supplied

If you need un-magnetized SmCo magnets,you should be familiar with the magnetizing energy of your magnetizing equipment, so as to choose the correct grades of SmCo magnets which can be completely full magnetized.