Samarium-cobalt-Tianjin Northern Permanent Magnet Technology Co., Ltd.

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Phone:022-87897560

Mobile: 13512985509
Email:info@north-magnet.cc
Fax: 022-87897562
Address: Floor 5, No. 4, Xinxing Park, Houtai Industrial Park, Xiqing District, Tianjin City

Samarium-cobalt

Product Introduction:

Samarium–cobalt magnets currently come in two main compositions: SmCo5 and Sm2Co17. They are produced by precisely proportioning samarium, cobalt, and other rare-earth metals, melting them into an alloy, and then subjecting the alloy to crushing, pressing, and sintering. These magnets exhibit a high magnetic energy product and an extremely low temperature coefficient, with a maximum operating temperature of up to 350°C and no lower‑temperature limit. At operating temperatures above 180°C, their thermal stability and chemical stability surpass those of neodymium‑iron‑boron permanent magnets.

Product Features:

Manufactured by powder metallurgy, with a chemical composition of SmCo5 and Sm2Co17.	Extremely hard and brittle
High demagnetization resistance	Excellent corrosion resistance
Raw materials are limited, hence the high cost.	Good temperature stability

Samarium-Cobalt Performance Table

Performance of SMCO5 Series Sintered Samarium–Cobalt Permanent Magnetic Materials
Material grade Grade	Remanent magnetic flux density Br		Magnetic coercivity Hcb	Intrinsic coercivity Hcj	Maximum magnetic energy product (BH)max		Curie temperature Tc	Operating temperature Tw	Remanence Temperature Coefficient T.C.α (Br)	Intrinsic coercivity temperature coefficient T.C.α(HcJ)

	Typical value	Minimum value	Minimum value	Minimum value	Typical value	Minimum value		Maximum value	Typical value	Typical value
	[T]	[T]	[kA/m]	[kA/m]	[kJ/m3]		[℃]	[℃]	[%/°C]	[%/°C]
	[KGs]	[KGs]	[KOe]	[KOe]	[MGOe]
SmCo16	0.83	0.81	620	1274	127	119	750	250	-0.04	-0.3
	8.3	8.1	7.8	16	16	15
SmCo18	0.87	0.84	645	1274	143	135	750	250	-0.04	-0.3
	8.7	8.4	8.1	16	18	17
SmCo20	0.92	0.89	680	1274	159	151	750	250	-0.04	-0.3
	9.2	8.9	8.5	16	20	19
SmCo22	0.95	0.93	710	1274	167	159	750	250	-0.04	-0.3
	9.5	9.3	8.9	16	21	20
SmCo24	0.98	0.96	730	1194	183	175	750	250	-0.04	-0.3

Material grade Grade	Remanent magnetic flux density Br		Magnetic coercivity Hcb	Intrinsic coercivity Hcj	Maximum magnetic energy product (BH)max		Curie temperature Tc	Operating temperature Tw	Remanence Temperature Coefficient T.C.α (Br)	Intrinsic coercivity temperature coefficient T.C.α(HcJ)

	Typical value	Minimum value	Minimum value	Minimum value	Typical value	Minimum value		Maximum value	Typical value	Typical value
	[T]	[T]	[kA/m]	[kA/m]	[kJ/m3]		[℃]	[℃]	[%/°C]	[%/°C]
	[KGs]	[KGs]	[KOe]	[KOe]	[MGOe]
SmCo24A	0.99	0.96	692	1990	183	175	820	350	-0.03	-0.2
	9.9	9.6	8.7	25	23	22
SmCo 24B	0.99	0.96	692	1433	183	175	820	300	-0.03	-0.2
	9.9	9.6	8.7	18	23	22
SmCo 26A	1.04	1.02	750	1990	199	191	820	350	-0.03	-0.2
	10.4	10.2	9.4	25	25	24
SmCo 26B	1.04	1.02	750	1433	199	191	820	300	-0.03	-0.2
	10.4	10.2	9.4	18	25	24
SmCo 28A	1.07	1.04	756	1990	215	207	820	350	-0.03	-0.2
	10.7	10.4	9.5	25	27	26
SmCo 28B	1.07	1.04	756	1433	215	207	820	300	-0.03	-0.2
	10.7	10.4	9.5	18	27	26
SmCo 30A	1.1	1.08	788	1990	239	222	820	350	-0.03	-0.2
	11	10.8	9.9	25	30	28
SmCo 30B	1.1	1.08	788	1433	239	222	820	300	-0.03	-0.2
	11	10.8	9.9	18	30	28
SmCo 32A	1.12	1.1	796	1433	255	230	820	300	-0.03	-0.2
	11.2	11	10	18	32	29

Physical Properties Table

Grade	SmCo ₅ (RECo ₅)	Sm2Co17(RE2Co17)
Temperature Coefficient of Remanence (Br)	-0.05%/°C	-0.03%/°C
Curie Temperature	750℃	800℃
Density	8.2–8.4 g/cm³	8.3–8.5 g/cm³
Vickers Hardness	450-500Hv	500-600Hv
Maximum Operating Temperature	250℃	300-350℃

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Phone:022-87897560

Mobile: +86 187 5658 8758
Email:info@north-magnet.cc
Fax: 022-87897562
Address: Floor 5, No. 4, Xinxing Park, Houtai Industrial Park, Xiqing District, Tianjin City

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