Neodymium Iron Boron Magnets

Neodymium Iron Boron Magnets

Neodymium iron boron (NdFeB), or “neo” magnets offer the highest energy product of any material today and are available in a wide range of shapes, sizes and grades. Neo magnets can be found in a variety of applications including high performance motors, brushless DC motors, magnetic separation, magnetic resonance imaging, sensors, switches and loudspeakers.

Arnold is now able to supply NdFeB that is fully compliant with the U.S. Defense Federal Acquisition Regulation Supplement (DFARS 225.7018 Restriction on acquisition of certain magnets and tungsten, ‘The John S. McCain National Defense Authorization Act – NDAA 2019’).

Magnetic properties will differ depending upon alignment direction during compaction and upon size and shape. Download individual spec sheets from the table below, or get the full neo catalog for specific grades and their magnetic properties, including the trade-off in Br (and energy product) for HcJ (intrinsic coercivity, resistance to demagnetization). For GBD Neo Grades, see below.


MAXIMUM USE TEMPERATURE AND CORROSION

Determining whether or not to use neo magnets instead of our RECOMA® SmCo magnets, for example, is a function of the maximum temperature of the application, required magnetic output at typical use temperature and total cost of the system.

Neo magnets have some limitations due to their corrosive behavior. In humid applications, a protective coating is highly recommended. Coatings which have been used successfully include epoxy coating, nickel plating and combinations of these coatings. Arnold also has the capability to apply Parylene coating to neo magnets. Effectiveness of coating is dependent upon the quality of the base material. Arnold has evaluated multiple manufacturers for corrosion resistance of the base material and only supplies licensed, highly corrosion-resistant materials produced under tight control.


AVAILABLE NEO GRADES

Edit Properties:BrBrHcBHcBHcJHcJBHmaxBHmaxRev. Temp. Coef.Rev. Temp. Coef.Temp.
Grade
Typical mT
Typical gauss
min kA/m
min oersteds
min kA/m
min oersteds
Typical kJ/m3
Typical MGOe
Br %/°C
HcJ %/°C
max °C
N30
1105
11,050
796
10,000
955
12,000
235
30
-0.12
-0.75
80
N33
1150
11,500
836
10,500
955
12,000
259
33
-0.12
-0.75
80
N35
1210
12,100
860
10,800
955
12,000
283
35
-0.12
-0.75
80
N38
1260
12,600
860
10,800
955
12,000
306
38
-0.12
-0.75
80
N40
1285
12,850
923
11,600
955
12,000
318
40
-0.12
-0.75
80
N42
1315
13,150
860
10,800
955
12,000
334
42
-0.12
-0.75
80
N45
1350
13,500
860
10,800
955
12,000
350
44
-0.12
-0.75
80
N48
1400
14,000
836
10,500
955
12,000
390
49
-0.12
-0.75
80
N50
1425
14,250
836
10,500
955
12,000
390
49
-0.12
-0.75
80
N52
1450
14,500
836
10,500
876
11,000
406
51
-0.12
-0.75
60
N55
1490
14,900
716
9,000
876
11,000
430
54
-0.12
-0.75
60
1175
11,750
836
10,500
1114
14,000
267
34
-0.12
-0.675
100
1210
12,100
868
10,900
1114
14,000
283
35
-0.12
-0.675
100
1260
12,600
899
11,300
1114
14,000
307
39
-0.12
-0.675
100
1285
12,850
923
11,600
1114
14,000
322
40
-0.12
-0.675
100
1315
13,150
955
12,000
1114
14,000
338
42
-0.12
-0.675
100
1350
13,500
971
12,200
1114
14,000
354
44
-0.12
-0.675
100
1395
13,950
995
12,500
1114
14,000
378
48
-0.12
-0.675
100
1415
14,150
1035
13,000
1114
14,000
390
49
-0.12
-0.675
100
1445
14,450
995
12,500
1035
13,000
406
51
-0.12
-0.675
100
1105
11,050
796
10,000
1353
17,000
235
30
-0.12
-0.605
120
1175
11,750
836
10,500
1353
17,000
267
34
-0.12
-0.605
120
1210
12,100
868
10,900
1353
17,000
283
35
-0.12
-0.605
120
1260
12,600
899
11,300
1353
17,000
307
39
-0.12
-0.605
120
1285
12,850
923
11,600
1353
17,000
322
40
-0.12
-0.605
120
1300
13,000
955
12,000
1353
17,000
330
41
-0.12
-0.605
120
1350
13,500
971
12,200
1353
17,000
354
44
-0.12
-0.605
120
1390
13,900
1011
12,700
1353
17,000
378
48
-0.12
-0.605
120
1415
14,150
1035
13,000
1274
16,000
390
49
-0.12
-0.605
120
1125
11,250
811
10,200
1592
20,000
243
31
-0.12
-0.535
150
1175
11,750
844
10,600
1592
20,000
267
34
-0.12
-0.535
150
1210
12,100
876
11,000
1592
20,000
283
35
-0.12
-0.535
150
1260
12,600
907
11,400
1592
20,000
307
39
-0.12
-0.535
150
1285
12,850
939
11,800
1592
20,000
322
40
-0.12
-0.535
150
1310
13,100
955
12,000
1592
20,000
330
41
-0.12
-0.535
150
1350
13,500
979
12,300
1592
20,000
354
44
-0.12
-0.535
150
1390
13,900
995
12,500
1512
19,000
374
47
-0.12
-0.535
150
1075
10,750
764
9,600
1990
25,000
227
29
-0.12
-0.465
180
1125
11,250
812
10,200
1990
25,000
243
31
-0.12
-0.465
180
1175
11,750
852
10,700
1990
25,000
267
34
-0.12
-0.465
180
1210
12,100
860
10,080
1990
25,000
283
35
-0.12
-0.465
180
1260
12,600
876
11,000
1990
25,000
307
39
-0.12
-0.465
180
1285
12,850
915
11,500
1990
25,000
318
40
-0.12
-0.465
180
1310
13,100
955
12,000
1990
25,000
330
41
-0.12
-0.465
180
1350
13,500
955
12,500
1910
24,000
358
45
-0.12
-0.465
180
1085
10,850
780
9,800
2388
30,000
227
29
-0.12
-0.42
200
1125
11,250
812
10,200
2388
30,000
243
31
-0.12
-0.42
200
1165
11,650
820
10,300
2388
30,000
267
34
-0.12
-0.42
200
1200
12,000
836
10,500
2388
30,000
279
35
-0.12
-0.42
200
1235
12,350
899
11,300
2388
30,000
303
38
-0.12
-0.42
200
1270
12,700
915
11,500
2388
30,000
314
39
-0.12
-0.42
200
1310
13,100
971
12,200
2308
29,000
326
41
-0.12
-0.42
200
1075
10,750
780
9,800
2706
34,000
223
28
-0.12
-0.393
220
1120
11,200
812
10,200
2706
34,000
239
30
-0.12
-0.393
220
1140
11,400
812
10,200
2706
34,000
231
29
-0.12
-0.393
220
1195
11,950
883
11,100
2706
34,000
275
35
-0.12
-0.393
220
1240
12,400
923
11,600
2626
33,000
299
38
-0.12
-0.393
220

Grain Boundary Diffusion (GBD)

“GBD Neo” magnets offer a combination of high energy density and temperature stability at moderate cost by reducing the amount of Dysprosium (Dy) (GBDD) and Terbium (Tb) (GBDT) used. This process enhances coercivity while limiting the adverse effects on remanence, when compared to traditional neo manufacturing methods. This process favors smaller magnets with a thickness of less than 6mm or laminated materials. For high frequency applications at working temperatures approaching 180°C, consider using this product. Get the full GBD Neo Catalog for specific grades and their magnetic properties.

Available Grain Boundary Diffused Neo Grades

Properties:BrBrHcBHcBHcJHcJBHmaxBHmaxRev. Temp. Coef.Rev. Temp. Coef.Temp.
Grade
Typical mT
Typical gauss
min kA/m
min oersteds
min kA/m
min oersteds
Typical kJ/m3
Typical MGOe
Br %/°C
HcJ %/°C
max °C
1350
13,500
979
12,300
1592
20,000
354
44
-0.12
-0.549
150
1390
13,900
1011
12,700
1592
20,000
374
47
-0.12
-0.549
150
1425
14,250
836
10,500
1592
20,000
390
49
-0.12
-0.549
150
1440
14,400
1067
13,400
1592
20,000
402
51
-0.12
-0.549
150
1460
14,600
1083
13,600
1512
19,000
418
53
-0.12
-0.549
150
1260
12,600
876
11,000
1990
25,000
307
39
-0.12
-0.465
180
1285
12,850
915
11,500
1990
25,000
318
40
-0.12
-0.465
180
1310
13,100
955
12,000
1990
25,000
330
41
-0.12
-0.465
180
1350
13,500
979
12,300
1990
25,000
354
44
-0.12
-0.465
180
1390
13,900
1011
12,700
1990
25,000
374
47
-0.12
-0.465
180
1410
14,100
1051
13,200
1990
25,000
386
49
-0.12
-04.65
180
1430
14,300
1067
13,400
1990
25,000
394
50
-0.12
-0.465
180
1125
11,250
812
10,200
2388
30,000
243
31
-0.12
-0.472
200
1200
12,000
836
10,500
2388
30,000
279
35
-0.12
-0.472
200
1260
12,600
876
11,000
2388
30,000
307
39
-0.12
-0.472
200
1285
12,850
915
11,500
2388
30,000
318
40
-0.12
-0.472
200
1310
13,100
955
12,000
2388
30,000
330
41
-0.12
-0.472
200
1310
13,100
971
12,200
2388
30,000
338
43
-0.12
-0.472
200
1360
13,600
1011
12,700
2388
30,000
362
46
-0.12
-0.472
200
1385
13,850
1027
12,900
2388
30,000
370
47
-0.12
-0.472
200
1125
11,250
812
10,200
2706
34,000
243
31
-0.12
-0.449
220
1165
11,650
820
10,300
2706
34,000
267
34
-0.12
-0.449
220
1200
12,000
836
10,500
2706
34,000
279
35
-0.12
-0.449
220
1260
12,600
876
11,000
2706
34,000
307
39
-0.12
-0.449
220
1285
12,850
915
11,500
2706
34,000
318
40
-0.12
-0.449
220
1250
12,500
923
11,600
2786
35,000
298.5
37.511
-0.12
-0.472
200
1275
12,750
955
12,000
2786
35,000
322
40.464
-0.12
-0.472
200
1320
13,200
979
12,300
2786
35,000
346
43.48
-0.12
-0.472
200
1235
12,350
915
11,500
2945
37,000
306.5
38.516
-0.12
-0.472
200
1275
12,750
955
12,000
2945
37,000
323.5
40.652
-0.12
-0.472
200