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Dimension Range of Sintered NdFeB
 Length (OD) mm
Width (ID)Â mm
Thickness (mm)
Min.
Max.
Min.
Max.
Min.
Max.
Block
1
150
1
100
0.5
150
Ring
1
180
1
140
0.6
50
Disc/Bar
1
150
 Â
 Â
0.6
50
 Length
Chord Length
Â
Â
Min.
Max
Min.
Max.
Â
Â
Segment
3
50
5
150
 Â
 Â
Magnetic Characteristics and Physical Properties of Sintered NdFeB
Grade
Remanence
Coercive Force
Intrinsic Coercive force
Max Energy Product
Highest Work temperature
Br
Hcb
Hci
(BH) max
T
KGs
KOe
KA/m
KOe
KA/m
MGOe
KJ/m
ºC
N35
1.16-1.22
11.6-12.2
11
876
12
955
33-36
263-287
80
N38
1.22-1.27
12.2-12.7
11
876
12
955
36-39
287-310
80
N40
1.25-1.31
12.5-1.31
11
876
12
955
38-41
303-326
80
N42
1.28-1.34
12.8-13.4
11
876
12
955
40-43
318-342
80
N45
1.32-1.38
13.2-13.8
11
876
12
955
43-46
342-366
80
N48
1.37-14.3
13.7-14.3
10.5
836
11.5
915
46-49
366-390
80
N50
1.40-1.46
14.0-14.6
10.5
836
11.5
915
48-51
382-406
80
N52
1.43-1.49
14.3-14.9
10.5
836
11.5
915
50-53
398-422
80
N30M
1.08-1.14
10.8-11.4
9.8
780
14
1114
28-31
223-247
100
N33M
1.14-1.18
11.4-11.8
10.3
820
14
1114
31-33
247-263
100
N35M
1.6-1.22
11.6-12.2
10.6
845
14
1114
33-36
263-287
100
N38M
1.23-1.27
12.3-12.7
11
876
14
1114
38-41
303-326
100
N40M
1.25-1.31
12.5-13.1
11.5
912
14
1114
38-41
303-326
100
N42M
1.28-1.34
12.8-13.4
11.8
938
14
1114
40-43
318-342
100
N45M
1.32-1.38
13.2-13.8
12.2
976
14
1114
43-46
342-366
100
N48M
1.37-1.43
13.7-14.3
12.7
1012
13.5
1075
46-49
366-390
100
N50M
1.40-1.46
14.0-14.6
13
1035
13.5
1075
48-51
382-406
100
N35H
1.16-1.22
11.6-12.2
10.6
845
17
1353
33-36
263-287
120
N38H
1.21-1.27
12.1-12.7
11.1
886
17
1353
36-39
287-310
120
N40H
1.25-1.31
12.5-13.1
11.5
912
17
1353
38-41
303-326
120
N42H
1.28-1.34
12.8-13.4
11.8
938
16.5
1313
40-43
318-342
120
N45H
1.32-1.38
13.2-13.8
12.2
976
16
1274
43-46
342-366
120
N30SH
1.07-1.14
10.7-11.4
9.7
772
20
1592
28-31
223-247
150
N33SH
1.22-1.19
1.14-1.18
10.2
816
20
1592
31-34
247-271
150
N35SH
1.16-1.22
11.6-12.2
10.6
845
20
1592
33-36
263-287
150
N38SH
1.21-12.7
12.1-12.7
11.1
886
20
1592
36-39
278-310
150
N40SH
1.25-1.31
12.5-13.1
11.5
912
20
1592
38-41
302-326
150
N42SH
1.28-1.34
12.8-13.4
11.8
938
20
1592
40-43
318-342
150
N30UH
1.07-1.14
10.7-11.4
9.7
772
25
1990
28-31
223-247
180
N33UH
1.12-1.19
11.2-11.9
10.2
816
25
1991
31-34
247-271
180
N35UH
1.16-1.22
11.6-12.2
10.6
845
24
1910
33-36
263-287
180
N38UH
1.21-1.27
12.1-12.7
11.1
886
24
1910
36-39
287-310
180
N30EH
1.07-1.14
10.7-11.4
9.7
772
30
2388
28-31
223-247
200
N33EH
1.12-1.19
11.2-11.9
10.2
816
30
2388
31-34
247-271
200
N35EH
1.16-1.22
11.6-12.2
10.6
845
30
2388
33-36
263-287
200
Physical Properties of Sintered NdFeB Material
Properties
Unit
Parameter
Curie Point
ºC
310-340
((Br)/ (%/K)Temp.Coeff.of Br
%ºC
-0.08 ~ - 0.12
(β(Hcj/%/K)Temp.Coeff.of Hcj
%ºC
-0.42 ~ -0.70
Density
g/cm3
≥7.3
Vickers Hardness
Hv
600
Bending strength
Mpa
250
Tensile strength
Mpa
80
Compressive strength
Mpa
1050
Electrical resistivity
μΩcm
150
Thermal conductivity
W/(m.ºC)
6 ~8
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