This is Sintered NdFeB magnet, it is the third Generation rare earth permanent magnet.
1. It is the most powerful and most strong magnet in the World at present.This is sintered NdFeB ring shaped magnet, and it is mainly used in loudspeakers. The fast development in loudspeakers, earthphone or other audio equipment require very high energy neo magnet which has stable performance at high temperature. Our SH grade ring magnets are proved to be the one of best choices.
2. As for high power requirement for the magnets in assemblying to loudspeaker parts, surface tension of the coating is critical for magnet choice.
3. Our trivalent chrome Zinc coating on neo magnets provide high surface tension and it is surely of environmental protection.
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Magnetic Characteristics And Physical Properties of Sintered NdFeB magnets |
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Properties |
Remanence |
Coercive Force |
Intrinsic Coercive Force |
Max Energy Product |
Max Working Temp |
|
Br |
Hcb |
Hcj |
(BH)max |
Tw |
Grade |
mT(KGs) |
KA/m (KGs) |
KA/m (KOe) |
KJ/m 3 ( MGOe ) |
℃ |
N-30 |
1080-1130 |
≥ 796 |
≥ 955 |
223-247 |
≤ 80 |
(10.8-11.3) |
( ≥ 10) |
( ≥ 12) |
(28-31) |
||
N-33 |
1130-1180 |
≥ 836 |
≥ 955 |
247-270 |
≤ 80 |
(11.3-11.8) |
( ≥ 10.5) |
( ≥ 12) |
(31-34) |
||
N-35 |
1170-1220 |
≥ 868 |
≥ 955 |
263-287 |
≤ 80 |
(11.7-12.2) |
( ≥ 10.9) |
( ≥ 12) |
(33-36) |
||
N-38 |
1220-1250 |
≥ 899 |
≥ 955 |
287-310 |
≤ 80 |
(12.2-12.5) |
( ≥ 11.3) |
( ≥ 12) |
(36-39) |
||
N-40 |
1250-1280 |
≥ 923 |
≥ 955 |
302-326 |
≤ 80 |
(12.5-12.8) |
( ≥ 11.6) |
( ≥ 12) |
(38-41) |
||
N-42 |
1280-1320 |
≥ 923 |
≥ 955 |
318-342 |
≤ 80 |
(12.8-13.2) |
( ≥ 11.6) |
( ≥ 12) |
(40-43) |
||
N-45 |
1320-1380 |
≥ 876 |
≥ 955 |
342-366 |
≤ 80 |
(13.2-13.8) |
( ≥ 11.0) |
( ≥ 12) |
(43-46) |
||
N-48 |
1380-1420 |
≥ 836 |
≥ 876 |
366-390 |
≤ 80 |
(13.8-14.2) |
( ≥ 10.5) |
( ≥ 11) |
(46-49) |
||
N-50 |
1400-1450 |
≥ 860 |
≥ 876 |
382-406 |
≤ 80 |
(14.0-14.5) |
( ≥ 10.8) |
( ≥ 11) |
(48-51) |
||
30M |
1080-1130 |
≥ 796 |
≥ 1114 |
223-247 |
≤ 100 |
(10.8-11.3) |
( ≥ 10) |
( ≥ 14) |
(28-31) |
||
33M |
1130-1180 |
≥ 836 |
≥ 1114 |
247-270 |
≤ 100 |
(11.3-11.8) |
( ≥ 10.5) |
( ≥ 14) |
(31-34) |
||
35M |
1170-1220 |
≥ 868 |
≥ 1114 |
263-287 |
≤ 100 |
(11.7-12.2) |
( ≥ 10.9) |
( ≥ 14) |
(33-36) |
||
38M |
1220-1250 |
≥ 899 |
≥ 1114 |
287-310 |
≤ 100 |
(12.2-12.5) |
( ≥ 11.3) |
( ≥ 14) |
(36-39) |
||
40M |
1250-1280 |
≥ 923 |
≥ 1114 |
302-326 |
≤ 100 |
(12.5-12.8) |
( ≥ 11.6) |
( ≥ 14) |
(38-41) |
||
42M |
1280-1320 |
≥ 955 |
≥ 1114 |
318-342 |
≤ 100 |
12.8-13.2 |
( ≥ 12.0) |
( ≥ 14) |
(40-43) |
||
45M |
1320-1380 |
≥ 995 |
≥ 1114 |
342-366 |
≤ 100 |
(13.2-13.8) |
( ≥ 12.5) |
( ≥ 14) |
(43-46) |
||
48M |
1360-1430 |
≥ 1027 |
≥ 1114 |
366-390 |
≤ 100 |
(13.6-14.3) |
( ≥ 12.9) |
( ≥ 14) |
(46-49) |
||
50M |
1400-1450 |
≥ 1033 |
≥ 1114 |
382-406 |
≤ 100 |
(14.0-14.5) |
( ≥ 13.0) |
( ≥ 14) |
(48-51) |
||
30H |
1080-1130 |
≥ 796 |
≥ 1353 |
223-247 |
≤ 120 |
(10.8-11.3) |
( ≥ 10) |
( ≥ 17) |
(28-31) |
||
33H |
1130-1180 |
≥ 836 |
≥ 1353 |
247-271 |
≤ 120 |
(11.3-11.8) |
( ≥ 10.5) |
( ≥ 17) |
(31-34) |
||
35H |
1170-1220 |
≥ 868 |
≥ 1353 |
263-287 |
≤ 120 |
(11.7-12.2) |
( ≥ 10.9) |
( ≥ 17) |
(33-36) |
||
38H |
1220-1250 |
≥ 899 |
≥ 1353 |
287-310 |
≤ 120 |
(12.2-12.5) |
( ≥ 11.3) |
( ≥ 17) |
(36-39) |
||
40H |
1250-1280 |
≥ 923 |
≥ 1353 |
302-326 |
≤ 120 |
(12.5-12.8) |
( ≥ 11.6) |
( ≥ 17) |
(38-41) |
||
42H |
1280-1320 |
≥ 955 |
≥ 1353 |
318-342 |
≤ 120 |
(12.8-13.2) |
( ≥ 12.0) |
( ≥ 17) |
(40-43) |
||
45H |
1320-1380 |
≥ 963 |
≥ 1353 |
342-366 |
≤ 120 |
(13.2-13.8) |
( ≥ 12.1) |
( ≥ 17) |
(43-46) |
||
48H |
1370-1430 |
≥ 995 |
≥ 1274 |
366-390 |
≤ 120 |
(13.7-14.3) |
( ≥ 12.5) |
( ≥ 16) |
(46-49) |
||
30SH |
1080-1130 |
≥ 804 |
≥ 1592 |
223-247 |
≤ 150 |
(10.8-11.3) |
( ≥ 10.1) |
( ≥ 20) |
(28-31) |
||
33SH |
1130-1170 |
≥ 844 |
≥ 1592 |
247-271 |
≤ 150 |
(11.3-11.7) |
≥ 10.6 |
( ≥ 20) |
(31-34) |
||
35SH |
1170-1220 |
≥ 876 |
≥ 1592 |
263-287 |
≤ 150 |
(11.7-12.2) |
( ≥ 11.0) |
( ≥ 20) |
(33-36) |
||
38SH |
1220-1250 |
≥ 907 |
≥ 1592 |
287-310 |
≤ 150 |
(12.2-12.5) |
( ≥ 11.4) |
( ≥ 20) |
(36-39) |
||
40SH |
1250-1280 |
≥ 939 |
≥ 1592 |
302-326 |
≤ 150 |
(12.5-12.8) |
( ≥ 11.8) |
( ≥ 20) |
(38-41) |
||
42SH |
1280-1320 |
≥ 995 |
≥ 1592 |
318-342 |
≤ 150 |
(12.8-13.2) |
( ≥ 12.5) |
( ≥ 20) |
(40-43) |
||
45SH |
1320-1380 |
≥ 1003 |
≥ 1592 |
342-366 |
≤ 150 |
(13.2-13.8) |
( ≥ 12.6) |
( ≥ 20) |
(43-46) |
||
28UH |
1020-1080 |
≥ 764 |
≥ 1990 |
207-231 |
≤ 180 |
(10.2-10.8) |
( ≥ 9.6) |
( ≥ 25) |
(26-29) |
||
30UH |
1080-1130 |
≥ 812 |
≥ 1990 |
223-247 |
≤ 180 |
(10.8-11.3) |
( ≥ 10.2) |
( ≥ 25) |
(28-31) |
||
33UH |
1130-1170 |
≥ 852 |
≥ 1990 |
247-271 |
≤ 180 |
(11.3-11.7) |
( ≥ 10.7) |
( ≥ 25) |
(31-34) |
||
35UH |
1180-1220 |
≥ 860 |
≥ 1990 |
263-287 |
≤ 180 |
(11.8-12.2) |
( ≥ 10.8) |
( ≥ 25) |
(33-36) |
||
38UH |
1220-1250 |
≥ 907 |
≥ 1990 |
287-310 |
≤ 180 |
(12.2-12.5) |
( ≥ 11.4) |
( ≥ 25) |
(36-39) |
||
30EH |
1080-1130 |
≥ 812 |
≥ 2388 |
223-247 |
≤ 200 |
(10.8-11.3) |
( ≥ 10.2) |
( ≥ 30) |
(28-31) |
||
33EH |
1130-1170 |
≥ 812 |
≥ 2388 |
247-271 |
≤ 200 |
(11.3-11.7) |
( ≥ 10.2) |
( ≥ 30) |
(31-34) |
||
35EH |
1170-1220 |
≥ 876 |
≥ 2388 |
263-287 |
≤ 200 |
(11.7-12.2) |
( ≥ 11.0) |
( ≥ 30) |
(33-36) |
||
30AH |
1080-1130 |
≥ 812 |
≥ 2785 |
223-247 |
≤ 240 |
(10.8-11.3) |
( ≥ 10.2) |
( ≥ 35) |
(28-31) |
||
33AH |
1130-1170 |
≥ 812 |
≥ 2785 |
247-271 |
≤ 240 |
(11.3-11.7) |
( ≥ 10.2) |
( ≥ 35) |
31-34 |
||
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NOTES: |
The above-mentioned data of magnetic parameters and physical properties ars given at room temperature. |
The maximum service temperature of magnet is changeable due to the ratio length and diameter and |
Environmental factors. |
Density: 7.4~7.6g/cm 3 ; α Br:-0.09~0.13%/ ℃, β Hcj: -0.50~0.80%/ ℃; Hv:600.