SmCo Magnets

• Sintered SmCo Magnets

Sintered SmCo Magnets

Samarium Cobalt permanent magnet is widely used second generation high energy material. Using Samarium and Cobalt as its rare earth element, it exhibits high magnetic performance characteristics in energy product 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.

 

 

Typical Magnetic Properties of Sintered SmCo Magnets

Character- istics	Residual Flux Br	Coercive Force Hcj	IntIntrinsic Corecive Force Hcj	Max.Energy product (BH)max	Curie Temp Tc	Density ρ	Temp Coefficient	Thermal Expansion Coefficient		Vickers Hardness
Material Grade	T (kGS)	KA/m   (kOe)	KA/m (kOe)	KJ/m (MGOe)	(C)	g/cm	(%℃)	C⊥ (1℃)	C// (1℃)	Hv
SM-18	0.8-0.9 (8.0-9.0)	621-700 (7.8-8.8)	≥1990 (≥25.0)	127-159 (16.0-20.0)	750-800	8.1-8.3	-0.05	13x104	6 x104	450-500
SM-20	0.88-0.94 (8.8-9.4)	676-732 (8.5-9.2)	≥1433 (≥18.0)	151-167 (19-21)	750-800	8.1-8.3	-0.05	13x104	6 x104	450-500
SM-22	0.94-1.0 (9.4-10.0)	700-748 (8.8-9.4)	≥1194 (≥15.0)	167-183 (21-23)	750-800	8.1-8.3	-0.05	13x104	6 x104	450-500
SM-18T	0.85-0.95 (8.5-9.5)	636-716 (8.0-9.0)	≥1592 (≥20.0)	127-159 (16.0-20.0)	800-850	8.3-8.5	-0.01	11x104	8 x104	500-600
SM-22T	0.94-1.0 (0.94-10.0)	676-756 (8.5-95)	≥1592 (≥20.0)	159-191 （20.0-24.0）	800-850	8.3-8.5	-0.01	11x104	8 x104	500-600
SM-22L	0.95-1.02 (9.5-10.2)	477-557 (6.0-7.0)	439-597 (6.2-7.5)	159-191 （20.0-24.0）	800-850	8.3-8.5	-0.03	11x104	8 x104	500-600
SM-22H	0.95-1.02 (9.5-10.2)	557-716 (7.0-9.0)	≥636 (≥8.0)	159-191 （20.0-24.0)	800-850	8.3-8.5	-0.03	11x104	8 x104	500-600
SM-26L	1.02-1.08 (10.2-10.8)	477-557 (6.0-7.0)	439-597 (6.2-7.5)	191-223 （24.0-28.0）	800-850	8.3-8.5	-0.03	11x104	8 x104	500-600
SM-26H	1.00-1.06 (10.0-10.6)	557-716 (7.0-9.0)	≥637 (≥8.0)	199-215 （25.0-27.0）	800-850	8.3-8.5	-0.03	11x104	8 x104	500-600
SM-26U	1.02-1.08 (10.2-10.8)	756-812 (9.5-10.2)	≥1990 (≥25.0)	199-223 （25.0-28.0）	800-850	8.3-8.5	-0.03	11x104	8 x104	500-600
SM-28H	1.06-1.10 (10.6-11.0)	557-716 (7.0-9.0)	≥636 (≥8.0)	214-238 （27.0-30.0）	800-850	8.3-8.5	-0.03	11x104	8 x104	500-600
SM-30L	1.08-1.15 (10.8-11.5)	477-557 (6.0-7.0)	439-597 (6.2-7.5)	223-254 （28.0-32.0）	800-850	8.3-8.5	-0.03	11x104	8 x104	500-600
SM-30U	1.08-1.12 (10.8-11.2)	796-836 (10.0-10.5)	≥1990 (≥25.0)	223-247 （28.0-31.0）	800-850	8.3-8.5	-0.03	11x104	8 x104	500-600
SM-32H	1.1-1.16 (11.0-11.6）	557-716 (7.0-9.0)	≥637 (≥8.0)	238-262 （30.0-33.0）	800-850	8.3-8.5	-0.03	11x104	8 x104	500-600

 

Note: Special properties can be achieved with custom method.

Physical Characteristics of Sintered SmCo Magnets

Hardness	HV 10
Compression Strength	300 - 900 N/mm2
Bending Strength	120 N/mm2
Modulus	1.2-2.0x104 N/mm3
Electrical Resistance at 20°C	>0.5 ohm-cm
Specific Heat Capacity	370 J/(kg.C)

Note:
1. The minimum dimension is 0.079" Diameter.
2. All shapes and properties can be supplied to meet customers' requirements.

Typical Characteristic Curve for SmCo permanent magnet