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 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).

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.

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.

Available Neo Grades

Properties:BrHcBHcJBHmaxRev. Temp. Coef.Temp.
GradeTypical mTTypical gaussmin kA/mmin oerstedsmin kA/mmin oerstedsTypical kJ/m3Typical MGOeBr %/°CHcJ %/°Cmax °C
N30110511,05079610,00095512,00023530-0.12-0.7580
N33115011,50083610,50095512,00025933-0.12-0.7580
N35121012,10086010,80095512,00028335-0.12-0.7580
N38126012,60086010,80095512,00030638-0.12-0.7580
N40128512,85092311,60095512,00031840-0.12-0.7580
N42131513,15086010,80095512,00033442-0.12-0.7580
N45135013,50086010,80095512,00035044-0.12-0.7580
N48140014,00083610,50095512,00037447-0.12-0.7580
N50142514,25083610,50095512,00039049-0.12-0.7580
N52145014,50083610,50087611,00040651-0.12-0.7560
N55149014,9007169,00087611,00043054-0.12-0.7560
N33M117511,75083610,500111414,00026734-0.12-0.675100
N35M121012,10086810,900111414,00028335-0.12-0.675100
N38M126012,60089911,300111414,00030739-0.12-0.675100
N40M128512,85092311,600111414,00032240-0.12-0.675100
N42M131513,15095512,000111414,00033842-0.12-0.675100
N45M135013,50097112,200111414,00035444-0.12-0.675100
N48M139513,95099512,500111414,00037848-0.12-0.675100
N50M141514,150103513,000111414,00039049-0.12-0.675100
N52M144514,45099512,500103513,00040651-0.12-0.675100
N30H110511,05079610,000135317,00023530-0.12-0.605120
N33H117511,75083610,500135317,00026734-0.12-0.605120
N35H121012,10086810,900135317,00028335-0.12-0.605120
N38H126012,60089911,300135317,00030739-0.12-0.605120
N40H128512,85092311,600135317,00032240-0.12-0.605120
N42H130013,00095512,000135317,00033041-0.12-0.605120
N45H135013,50097112,200135317,00035444-0.12-0.605120
N48H139013,900101112,700135317,00037848-0.12-0.605120
N50H141514,150103513,000127416,00039049-0.12-0.605120
N30SH112511,25081110,200159220,00024331-0.12-0.535150
N33SH117511,75084410,600159220,00026734-0.12-0.535150
N35SH121012,10087611,000159220,00028335-0.12-0.535150
N38SH126012,60090711,400159220,00030739-0.12-0.535150
N40SH128512,85093911,800159220,00032240-0.12-0.535150
N42SH131013,10095512,000159220,00033041-0.12-0.535150
N45SH135013,50097912,300159220,00035444-0.12-0.535150
N48SH139013,90099512,500151219,00037447-0.12-0.535150
N28UH107510,7507649,600199025,00022729-0.12-0.465180
N30UH112511,25081210,200199025,00024331-0.12-0.465180
N33UH117511,75085210,700199025,00026734-0.12-0.465180
N35UH121012,10086010,080199025,00028335-0.12-0.465180
N38UH126012,60087611,000199025,00030739-0.12-0.465180
N40UH128512,85091511,500199025,00031840-0.12-0.465180
N42UH131013,10095512,000199025,00033041-0.12-0.465180
N45UH135013,50095512,500191024,00035845-0.12-0.465180
N28EH108510,8507809,800238830,00022729-0.12-0.42200
N30EH112511,25081210,200238830,00024331-0.12-0.42200
N33EH116511,65082010,300238830,00026734-0.12-0.42200
N35EH120012,00083610,500238830,00027935-0.12-0.42200
N38EH123512,35089911,300238830,00030338-0.12-0.42200
N40EH127012,70091511,500238830,00031439-0.12-0.42200
N42EH131013,10097112,200230829,00032641-0.12-0.42200
N28AH107510,7507809,800270634,00022328-0.12-0.393220
N30AH112011,20081210,200270634,00023930-0.12-0.393220
N33AH114011,40081210,200270634,00023129-0.12-0.393220
N35AH119511,95088311,100270634,00027535-0.12-0.393220
N38AH124012,40092311,600262633,00029938-0.12-0.393220
N45SHGBD135013,50097912,300159220,00035444-0.12-0.549150
N48SHGBD139013,900101112,700159220,00037447-0.12-0.549150
N50SHGBD142514,25083610,500159220,00039049-0.12-0.549150
N52SHGBD144014,400106713,400159220,00040251-0.12-0.549
150
N55SHGBD146014,600108313,600151219,00041853-0.12-0.549150
N48SHGBD-B139013,900101112,700175122,00037447-0.12-0.549150
N50SHGBD-B142514,25083610,500175122,00039049-0.12-0.549150
N52SHGBD-B144014,400106713,400175122,00040251-0.12-0.549150
N55SHGBD-B146014,600108313,600167221,00041853-0.12-0.549150
N38UHGBD126012,60087611,000199025,00030739-0.12-0.465180
N40UHGBD128512,85091511,500199025,00031840-0.12-0.465180
N42UHGBD131013,10095512,000199025,00033041-0.12-0.465180
N45UHGBD135013,50097912,300199025,00035444-0.12-0.465180
N48UHGBD139013,900101112,700199025,00037447-0.12-0.465180
N50UHGBD141014,100105113,200199025,00038649-0.12-04.65180
N52UHGBD143014,300106713,400199025,00039450-0.12-0.465180
N42UHGBD-B131013,10095512,000214927,00033041-0.12-0.465180
N45UHGBD-B135013,50097912,300214927,00035444-0.12-0.465180
N48UHGBD-B139013,900101112,700241927,00037447-0.12-0.465180
N50UHGBD-B141014,100105113,200244927,00038648.506-0.12-0.465180
N30EHGBD112511,25081210,200238830,00024331-0.12-0.472200
N33EHGBD116511,65082010,300238830,00026734-0.12-0.472200
N35EHGBD120012,00083610,500238830,00027935-0.12-0.472200
N38EHGBD126012,60087611,000238830,00030739-0.12-0.472200
N40EHGBD128512,85091511,500238830,00031840-0.12-0.472200
N42EHGBD131013,10095512,000238830,00033041-0.12-0.472200
N44EHGBD131013,10097112,200238830,00033842.474-0.12-0.472200
N46EHGBD136013,600101112,700238830,00036245.49-0.12-0.472200
N48EHGBD138513,850102712,900238830,00037046.496-0.12-0.472200
N38EHGBD-B126012,60087611,000245732,000306.538.516-0.12-0472200
N40EHGBD-B128512,85091511,500254732,00031839.961-0.12-0.472200
N44EHGBD-B131013,10097112,200254732,00033842.474-0.12-0.472200
N46EHGBD-B136013,600101112,700254732,00036245.49-0.12-0.472200
N30AHGBD112511,25081210,200270634,00024331-0.12-0.449220
N33AHGBD116511,65082010,300270634,00026734-0.12-0.449220
N35AHGBD120012,00083610,500270634,00027935-0.12-0.449220
N38AHGBD126012,60087611,000270634,00030739-0.12-0.449220
N40AHGBD128512,85091511,500270634,00031840-0.12-0.449220
N38EHGBD-S125012,50092311,600278635,000298.537.511-0.12-0.472200
N40EHGBD-S127512,75095512,000278635,00032240.464-0.12-0.472200
N44EHGBD-S132013,20097912,300278635,00034643.48-0.12-0.472200
N38EHGBD-SB123512,35091511,500294537,000306.538.516-0.12-0.472200
N40EHGBD-SB127512,75095512,000294537,000323.540.652-0.12-0.472200