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 and loudspeakers.

Magnetic properties will differ depending upon alignment direction during compaction and upon size and shape. Download individual specification sheets from the table below, or get the full neo catalogue for specific grades and their magnetic properties, including the trade-off in Br (and energy product) for HcJ (intrinsic coercivity, resistance to demagnetisation). 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 behaviour. 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

Properties:BrHcBHcJBHmaxRev. Temp. Coef.Temp.
GradeTypical mTTypical gaussmin kA/mmin oerstedsmin kA/mmin oerstedsTypical kJ/m3Typical MGOeBr %/°CHcJ %/°Cmax °C
N301,10511,05079610,00095512,00023530-0.12-0.7580
N331,15011,50083610,50095512,00025933-0.12-0.7580
N351,21012,10086010,80095512,00028335-0.12-0.7580
N381,26012,60086010,80095512,00030638-0.12-0.7580
N401,28512,85092311,60095512,00031840-0.12-0.7580
N421,31513,15086010,80095512,00033442-0.12-0.7580
N451,35013,50086010,80095512,00035044-0.12-0.7580
N481,40014,00083610,50095512,00037447-0.12-0.7580
N501,42514,25083610,50095512,00039049-0.12-0.7580
N521,45014,50083610,50087611,00040651-0.12-0.7560
N551,49014,9007169,00087611,00043054-0.12-0.7560
N33M1,17511,75083610,5001,11414,00026734-0.12-0.675100
N35M1,21012,10086810,9001,11414,00028335-0.12-0.675100
N38M1,26012,60089911,3001,11414,00030739-0.12-0.675100
N40M1,28512,85092311,6001,11414,00032240-0.12-0.675100
N42M1,31513,15095512,0001,11414,00033842-0.12-0.675100
N45M1,35013,50097112,2001,11414,00035444-0.12-0.675100
N48M1,39513,95099512,5001,11414,00037848-0.12-0.675100
N50M1,41514,1501,03513,0001,11414,00039049-0.12-0.675100
N52M1,44514,45099512,5001,03513,00040651-0.12-0.675100
N30H1,10511,05079610,0001,35317,00023530-0.12-0.605120
N33H1,17511,75083610,5001,35317,00026734-0.12-0.605120
N35H1,21012,10086810,9001,35317,00028335-0.12-0.605120
N38H1,26012,60089911,3001,35317,00030739-0.12-0.605120
N40H1,28512,85092311,6001,35317,00032240-0.12-0.605120
N42H1,30013,00095512,0001,35317,00033041-0.12-0.605120
N45H1,35013,50097112,2001,35317,00035444-0.12-0.605120
N48H1,39013,9001,01112,7001,35317,00037848-0.12-0.605120
N50H1,41514,1501,03513,0001,27416,00039049-0.12-0.605120
N30SH1,12511,25081110,2001,59220,00024331-0.12-0.535150
N33SH1,17511,75084410,6001,59220,00026734-0.12-0.535150
N35SH1,21012,10087611,0001,59220,00028335-0.12-0.535150
N38SH1,26012,60090711,4001,59220,00030739-0.12-0.535150
N40SH1,28512,85093911,8001,59220,00032240-0.12-0.535150
N42SH1,31013,10095512,0001,59220,00033041-0.12-0.535150
N45SH1,35013,50097912,3001,59220,00035444-0.12-0.535150
N48SH1,39013,90099512,5001,51219,00037447-0.12-0.535150
N28UH1,07510,7507649,6001,99025,00022729-0.12-0.465180
N30UH1,12511,25081210,2001,99025,00024331-0.12-0.465180
N33UH1,17511,75085210,7001,99025,00026734-0.12-0.465180
N35UH1,21012,10086010,0801,99025,00028335-0.12-0.465180
N38UH1,26012,60087611,0001,99025,00030739-0.12-0.465180
N40UH1,28512,85091511,5001,99025,00031840-0.12-0.465180
N42UH1,31013,10095512,0001,99025,00033041-0.12-0.465180
N45UH1,35013,50095512,5001,91024,00035845-0.12-0.465180
N28EH1,08510,8507809,8002,38830,00022729-0.12-0.42200
N30EH1,12511,25081210,2002,38830,00024331-0.12-0.42200
N33EH1,16511,65082010,3002,38830,00026734-0.12-0.42200
N35EH1,20012,00083610,5002,38830,00027935-0.12-0.42200
N38EH1,23512,35089911,3002,38830,00030338-0.12-0.42200
N40EH1,27012,70091511,5002,38830,00031439-0.12-0.42200
N42EH1,31013,10097112,2002,30829,00032641-0.12-0.42200
N28AH1,07510,7507809,8002,70634,00022328-0.12-0.393220
N30AH1,12011,20081210,2002,70634,00023930-0.12-0.393220
N33AH1,14011,40081210,2002,70634,00023129-0.12-0.393220
N35AH1,19511,95088311,1002,70634,00027535-0.12-0.393220
N38AH1,24012,40092311,6002,62633,00029938-0.12-0.393220

Grain Boundary Diffusion (GBD)

“GBD Neo” magnets offer a combination of high energy density and temperature stability at a 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 favours 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 Catalogue for specific grades and their magnetic properties.

Available Grain Boundary Diffused Neo Grades

Properties:BrHcBHcJBHmaxRev. Temp. Coef.Temp.
GradeTypical mTTypical gaussmin kA/mmin oerstedsmin kA/mmin oerstedsTypical kJ/m3Typical MGOeBr %/°CHcJ %/°Cmax °C
G45SH1,35013,50097912,3001,59220,00035444-0.12-0.549150
G48SH1,39013,9001,01112,7001,59220,00037447-0.12-0.549150
G50SH1,42514,25083610,5001,59220,00039049-0.12-0.549150
G52SH1,44014,4001,06713,4001,59220,00040251-0.12-0.549150
G55SH1,46014,6001,08313,6001,51219,00041853-0.12-0.549150
G38UH1,26012,60087611,0001,99025,00030739-0.12-0.465180
G40UH1,28512,85091511,5001,99025,00031840-0.12-0.465180
G42UH1,31013,10095512,0001,99025,00033041-0.12-0.465180
G45UH1,35013,50097912,3001,99025,00035444-0.12-0.465180
G48UH1,39013,9001,01112,7001,99025,00037447-0.12-0.465180
G50UH1,41014,1001,05113,2001,99025,00038649-0.12-04.65180
G52UH1,43014,3001,06713,4001,99025,00039450-0.12-0.465180
G30EH1,12511,25081210,2002,38830,00024331-0.12-0.472200
G33EH1,16511,65082010,3002,38830,00026734-0.12-0.472200
G35EH1,20012,00083610,5002,38830,00027935-0.12-0.472200
G38EH1,26012,60087611,0002,38830,00030739-0.12-0.472200
G40EH1,28512,85091511,5002,38830,00031840-0.12-0.472200
G42EH1,31013,10095512,0002,38830,00033041-0.12-0.472200
G44EH1,31013,10097112,2002,38830,00033843-0.12-0.472200
G46EH1,36013,6001,01112,7002,38830,00036246-0.12-0.472200
G48EH1,38513,8501,02712,9002,38830,00037047-0.12-0.472200
G30AH1,12511,25081210,2002,70634,00024331-0.12-0.449220
G33AH1,16511,65082010,3002,70634,00026734-0.12-0.449220
G35AH1,20012,00083610,5002,70634,00027935-0.12-0.449220
G38AH1,26012,60087611,0002,70634,00030739-0.12-0.449220
G40AH1,28512,85091511,5002,70634,00031840-0.12-0.449220
GS38EH1,25012,50092311,6002,78635,000298.537.511-0.12-0.472200
GS40EH1,27512,75095512,0002,78635,00032240.464-0.12-0.472200
GS44EH1,32013,20097912,3002,78635,00034643.48-0.12-0.472200
GSB38EH1,23512,35091511,5002,94537,000306.538.516-0.12-0.472200
GSB40EH1,27512,75095512,0002,94537,000323.540.652-0.12-0.472200
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