Ring Shape NdFeB Magnet

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China Mainland
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Rare earth permanent magnetic material is samarium, neodymium with a mixed rare earth transition metal (such as cobalt, iron, etc.) composition of the alloy, powder metallurgy method-pressure sintering a magnetic material.
Samarium Cobalt rare earth permanent magnet points (SmCo) permanent magnet and neodymium (NdFeB) permanent magnets. SmCo magnet which magnetic energy product among 15--30MGOe, a NdFeB magnet magnetic energy product among 27--50MGOe, known as "the permanent King", is the highest permanent magnetic material.
Become a rare earth permanent magnet materials electronic communication technology is an important material used in satellites, radar traveling wave tubes, circulators and micro-motors, micro recorders, aviation equipment, electronic watches, seismographs and other electronic equipment on. A rare earth permanent magnet applications penetrate into automobiles, household appliances, electronic instruments, magnetic resonance imaging, medical and audio equipment, micro motor, mobile phones and so on. In

Performance/ Grade	Br mT (KGs)		HcB KA/m (KOe)	HcJ KA/m (KOe)	(BH)max KJ/m3 (MGOe)		TW(?)
N35	1180(11.8)	1230(12.1)	868(10.9)	955(12)	263(33)	278(35)	80
N38	1230(12.3)	1250(12.5)	899(11.3)	955(12)	287(36)	295(37)	80
N40	1270(12.7)	1280(12.8)	923(11.6)	955(12)	303(38)	310(39)	80
N42	1290(12.9)	1310(13.1)	923(11.6)	955(12)	318(40)	326(41)	80
N45	1330(13.3)	1350(13.5)	876(11.0)	955(12)	342(43)	350(44)	80
N48	1360(13.6)	1380(13.8)	836(10.5)	955(12)	366(46)	374(47)	80
N50	1410(14.1)	1420(14.2)	860(10.8)	876(11)	374(47)	390(49)	70
N52	1430(14.3)	1440(14.4)	836(10.8)	876(11.0)	390(49)	406(51)	70
30M	1080(10.8)	1140(11.4)	796(10)	1114(14)	223(28)	246(31)
33M	1130(11.3)	1150(11.5)	836(10.5)	1114(14)	247(31)	255(32)
35M	1180(11.8)	1200(12.0)	868(10.9)	1114(14)	263(33)	271(34)
38M	1230(12.3)	1250(12.5)	899(11.3)	1114(14)	287(36)	295(37)
40M	1270(12.7)	1280(12.8)	923(11.6)	1114(14)	303(38)	310(39)
42M	1290(12.9)	1310(13.1)	955(12.0)	1114(14)	318(40)	326(41)
45M	1330(13.3)	1350(13.5)	995(12.5)	1114(14)	342(43)	350(44)
48M	1360(13.6)	1380(13.8)	1027(12.9)	1114(14)	358(45)	374(47)
50M	1410(14.1)	1420(14.2)	1050(13.2)	1114(14)	374(47)	390(49)
30H	1080(10.8)	1100(11.0)	796(10)	1353(17)	223(28)	239(30)
33H	113011.3)	1150(11.5)	836(10.5)	1353(17)	247(31)	255(32)
35H	1180(11.8)	1200(12.0)	868(10.9)	1353(17)	263(33)	271(34)
38H	1230(12.3)	1250(12.5)	899(11.3)	1353(17)	287(36)	295(37)
40H	1270(12.7)	1280(12.8)	923(11.6)	1353(17)	303(38)	310(39)
42H	1290(12.9)	1310(13.1)	955(12.0)	1353(17)	318(40)	326(41)
45H	1330(13.3)	1340(13.4)	995(12.5)	1353(16)	342(43)	350(44)
48H	1360(13.6)	1380(13.8)	1027(12.9)	1353(16)	358(45)	366(46)
28SH	1050(10.5)	1080(10.8)	764(9.6)	1592(20)	207(26)	215(27)
30SH	1080(10.8)	1100(11.0)	804(10.1)	1592(20)	223(28)	239(30)
33SH	1130(11.3)	1150(11.5)	844(10.6)	1592(20)	247(31)	255(32)
35SH	1180(11.8)	1200(12.0)	876(11.0)	1592(20)	263(33)	271(34)
38SH	1230(12.3)	1250(12.5)	907(11.4)	1592(20)	287(36)	295(37)
40SH	1270(12.7)	1280(12.8)	939(11.8)	1592(20)	303(38)	310(39)
42SH	1290(12.9)	1310(13.1)	955(12.0)	1592(20)	318(40)	326(41)
45SH	1320(13.2)	1340(13.4)	995(12.5)	1592(20)	334(42)	342(43)
28UH	1050(10.5)	1080(10.8)	764(9.6)	1990(25)	207(26)	223(28)
30UH	1080(10.8)	1100(11.0)	812(10.2)	1990(25)	223(28)	239(30)
33UH	1130(11.3)	1150(11.5)	852(10.7)	1990(25)	247(31)	255(32)
35UH	1180(11.8)	1200(12.0)	860(10.8)	1990(25)	263(33)	271(34)
38UH	1230(12.3)	1250(12.5)	907(11.4)	1990(25)	287(36)	295(37)
40UH	1260(12.6)	1270(12.7)	923(11.6)	1990(25)	303(38)	310(39)
42UH	1290(12.9)	1310(13.1)	923(11.6)	1990(25)	318(40)	326(41)
28EH	1050(10.5)	1080(10.8)	764(9.6)	2388(30)	207(26)	223(28)
30EH	1080(10.8)	1100(11.0)	812(10.2)	2388(30)	223(28)	239(30)
33EH	1130(11.3)	1150(11.5)	812(10.2)	2388(30)	247(31)	255(32)
35EH	1180(11.8)	1200(12.0)	812(10.2)	2388(30)	263(33)	271(34)
38EH	1230(12.3)	1250(12.5)	868(10.9)	2388(30)	287(36)	295(37)
30TH	1080(10.8)	1100(11.0)	812(10.2)	2627(33)	223(28)	239(30)
33TH	1130(11.3)	1150(11.5)	812(10.2)	2627(33)	247(31)	255(32)