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MAGNETIC PROPERTIES OF NEODYMIUM MAGNETS

There are eight different standard grades of neodymium magnets typically used in commercial applications today ranging from N35 to N52. Neodymium magnets are graded by their maximum energy product (BH)max  with N52 grade neodymium providing the greatest magnetic performance and N35 being the weakest. The magnetic properties of the various grades of neodymium magnets are adjusted by using varying amounts of rare earth elements in the alloy mixture, with each element adjusting the materials characteristics in a different way. Below, you can see the list of standard neodymium magnet grades and their magnetic properties below.

GradeRemanence (BR)
mT
(KGS)
Coercive Force (Hcb)
kA/m
(kOe)
Intrinisc Coercive Force (Hcj)
kA/m
(kOe)
Max. Energy Product (BH)maxMax. Operating Temp
TW
N35 1170-1220
(11.7- 2.2)
868
(10.9)
955
12
263-287
(33-36)
80
N38 1220-1250
(12.2-12.5)
899
(11.3)
955
(12)
287-310
(36-39)
80
N40 1250-1280
(12.5-12.8)
907
(11.4)
955
(12)
302-326
(38-41)
80
N42 1280-1320
(12.8-13.2)
915
(11.5)
955
(12)
318-342
(40-43)
80
N45 1320-1380
(13.2-13.8)
923
(11.6)
955
(12)
342-366
(434-46)
80
N48 1380-1420
(13.8-14.2)
923
(11.6)
955
(12)
366-390
(46-49)
80
N50 1400-1450
(14-14.5)
796
(10)
876
(11)
382-406
(48-51)
80
N52 1430-1480
(14.3-14.80)
796
(10)
876
(11)
398-422
(50-53)
80

 

In addition to the above standard grades, there are 32 different high temperature grades of neodymium magnets available with a maximum operating temperature of up to 230 degrees Celsius. To give a neodymium magnet a greater resistance to being demagnetised at higher temperatures, varying levels of rare earth elements are used, typically resulting in a trade off with overall magnetic strength.

GradeRemanence (BR)
mT
(KGS)
Coercive Force (Hcb)
kA/m
(kOe)
Intrinisc Coercive Force (Hcj)
kA/m
(kOe)
Max. Energy Product (BH)maxMax. Operating Temp
TW
N33M 1130-1170
(11.3-11.7)
836
(10.5)
1114
(14)
247-263
(31-33)
100
N35M 1170-2220
(11.7-12.2)
868
(10.9)
1114
(14)
263-287
(33-36)
100
N38M 1220-1250
(12.2-12.5)
899
(11.3)
1114
(14)
287-310
(36-39)
100
N40M 1250-1280
(12.5-12.8)
923
(11.6)
1114
(14)
302-326
(38-41)
100
N42M 1280-1320
(12.8-13.2)
995
(12)
1114
(14)
318-342
(40-43)
100
N45M 1320-1380
(13.2-13.8)
995
(12.5)
1114
(14)
342-366
(43-46)
100
N48M 1360-1430
(13.6-14.3)
1027
(12.9)
1114
(14)
366-390
(46-49)
100
N50M 1400-1450
(14.0-14.5)
1033
(13)
1114
(14)
382-406
(48-51)
100
N35H 1170-1220
(11.7-12.2)
868
(10.9)
1353
(17)
263-287
(33-36)
120
N38H 1220-1250
(12.2-12.5)
899
(11.3)
1353
(17)
287-310
(36-39)
120
N40H 1250-1280
(12.5-12.8)
923
(11.6)
1353
(17)
302-326
(38-41)
120
N42H 1280-1320
(12.8-13.2)
955
(12)
1353
(17)
318-342
(40-43)
120
N45H 1320-1360
(13.2-13.6)
963
(12.1)
1353
(17)
342-366
(43-46)
120
N48H 1370-1430
(13.7-14.3)
995
(12.5)
1353
(17)
366-390
(46-49)
120
N35SH 1170-1220
(11.7-12.2)
876
(11)
1592
(20)
263-287
(33-36)
150
N38SH 1220-1250
(12.2-12.5)
907
(11.4)
1592
(20)
287-310
(36-39)
150
N40SH 1240-1280
(12.5-12.8)
939
(11.8)
1592
(20)
302-326
(38-41)
150
N45SH 1320-1380
(13.2-13.8)
1003
(12.6)
1592
(20)
242-366
(43-46)
150
N28UH 1020-1080
(10.2-10.8)
764
(9.6)
1990
(25)
207-231
(26-29)
180
N30UH 1080-1130
(10.8-11.3)
812
(10.2)
1990
(25)
223-247
(28-31)
1800
N33UH 1130-1170
(11.3-11.7)
852
(10.7)
1990
(25)
247-271
(31-34)
180
N35UH 1180-1220
(11.8-12.2)
860
(10.8)
1990
(25)
263-287
(33-36)
180
N38UH 1220-1250
(12.2-12.5)
876
(11.0)
1990
(25)
287-310
(36-39)
180
N40UH 1240-1280
(12.5-12.8)
899
(11.3)
1990
(25)
302-326
(38-41)
180
N28EH 1040-1090
(10.4-10.9)
780
(9.8)
2388
(30)
207-231
(26-29)
200
N30EH 1080-1130
(10.8-11.3)
812
(10.2)
2388
(30)
223-247
(28-31)
200
N33EH 1130-1170
(11.3-11.7)
876
(10.5)
2388
(30)
247-271
(31-34)
200
N35EH 1170-1220
(11.7-12.2)
876
(11.0)
2388
(30)
263-287
(33-36)
200
N38EH 1220-1250
(12.2-12.5)
899
(11.3)
2388
(30)
287-310
(36-39)
200
N28AH 1040-1090
(10.4-10.9)
787
(9.9)
2624
(33)
207-231
(26-29)
230
N30AH 1080-1130
(10.8-11.3)
819
(10.3)
2624
(33)
223-247
(28-31)
230
N33AH 1130-1170
(11.3-11.7)
843
(10.6)
2624
(33)
247-271
(31-34)
230

If you require any advice regarding the most suitable grade of magnetic material to use in your application, then please give our experts a call today on 0845 5194701.