SmCo magnets are also named with SmCo magnetic steels, SmCo permanent magnet, SmCo permanent magnetic iron and rare earth cobalt permanent magnet. It is a high performance, low temperature coefficient permanent magnet with its high working temperature-350 degree centigrade. When working above 180 degree centigrade, its maximum energy prodcut BH and steady temperature are superior than NdFeB magnetic material. It needn't to be coated because it is difficult to be eroded and oxidized.
SmCo arc magnets widely used in motors, watch and so on.
Magnetic Characteristics of Sintered SmCo:
Materia | Grade | Max Engery product | Remanence | Coercive Force | Intrinsic Coercive Force | Temp Coeff | Density | Curie Temp | Working Temp |
(BH)max | Br | Hcb | Hcj | αBr | D | Tc | Tw |
KJ/m3(MGOe) | mT(KGs) | KA/m(KOe) | KA/m(KOe) | %/ ℃ | g/cm3 | ℃ | ℃ |
Sm1Co5 | 18A | 143(18) | 850(8.5) | 597(7.5) | 1273(16.0) | -0.04 | 8.2 | 740 | 250 |
18B | 143(18) | 850(8.5) | 660(8.3) | 1600(20.0) |
19 | 150(19) | 900(9.0) | 690(8.7) | 900(11.3) |
20A | 159(20) | 900(9.0) | 613(7.7) | 1989(25.0) |
20B | 160(20) | 900(9.0) | 660(8.3) | 900(11.3) |
20C | 160(20) | 900(9.0) | 680(8.5) | 1270(16.0) |
21 | 165(21) | 920(9.2) | 710(8.9) | 1600(20.0) |
22A | 175(22) | 940(9.4) | 700(8.8) | 900(11.3) |
22B | 180(22) | 950(9.5) | 720(9.0) | 1270(16.0) |
Sm2Co17 | 24C | 191(24) | 1000(10.0) | 356(4.5) | 413(5.2) | -0.03 | 8.3 | 820 | 350 |
24D | 190(24) | 1000(10.0) | 480(6.0) | 560(7.0) |
24E | 190(24) | 1010(10.1) | 675(8.5) | 1300(16.0) |
24F | 190(24) | 980(9.8) | 710(8.9) | 900(11.3) |
24G | 190(24) | 1000(10.0) | 740(9.3) | 2070(26.0) |
24H | 195(24) | 1020(10.2) | 748(9.4) | 1433(18.0) |
25 | 205(26) | 1040(10.4) | 700(8.8) | 1300(16.0) |
26A | 205(26) | 1020(10.2) | 420(5.2) | 440(5.5) |
26B | 207(26) | 1030(10.3) | 716(9.0) | 1432(18.0) |
26C | 210(26) | 1020(10.2) | 740(9.3) | 900(11.3) |
26D | 205(26) | 1050(10.5) | 756(9.5) | 1433(18.0) |
26E | 210(26) | 1070(10.7) | 780(9.8) | 2070(26.0) |
28A | 220(28) | 1080(10.8) | 420(5.2) | 440(5.5) |
28B | 223(28) | 1100(11.0) | 438(5.5) | 454(5.7) |
28C | 220(28) | 1090(10.9) | 520(6.5) | 560(7.0) |
28D | 224(28) | 1110(11.1) | 640(8.0) | 1040(13.0) |
28E | 225(28) | 1060(10.6) | 760(9.6) | 900(11.3) |
28F | 220(28) | 1080(10.8) | 780(9.8) | 955(18.0) |
28G | 220(28) | 1100(11.0) | 820(10.3) | 2070(26.0) |
30A | 240(30) | 1100(11.0) | 780(9.8) | 900(11.3) |

The demagnetized curve of
Sintered Sm2Co17 magnet
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Category:
SmCo Arc Magnets
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SmCo Disc Magnets
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