Neodymium Magnets (NdFeB) | Arnold Magnetic Technologies

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:	Br	Br	HcB	HcB	HcJ	HcJ	BHmax	BHmax	Rev. 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
N35	1210	12,100	860	10,800	955	12,000	283	35	-0.12	-0.618	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
N33M	1175	11,750	836	10,500	1114	14,000	267	34	-0.12	-0.675	100
N35M	1210	12,100	868	10,900	1114	14,000	283	35	-0.12	-0.675	100
N38M	1260	12,600	899	11,300	1114	14,000	307	39	-0.12	-0.675	100
N40M	1285	12,850	923	11,600	1114	14,000	322	40	-0.12	-0.675	100
N42M	1315	13,150	955	12,000	1114	14,000	338	42	-0.12	-0.675	100
N45M	1350	13,500	971	12,200	1114	14,000	354	44	-0.12	-0.675	100
N48M	1395	13,950	995	12,500	1114	14,000	378	48	-0.12	-0.675	100
N30H	1105	11,050	796	10,000	1353	17,000	235	30	-0.12	-0.605	120
N33H	1175	11,750	836	10,500	1353	17,000	267	34	-0.12	-0.605	120
N35H	1210	12,100	868	10,900	1353	17,000	283	35	-0.12	-0.605	120
N38H	1260	12,600	899	11,300	1353	17,000	307	39	-0.12	-0.605	120
N40H	1285	12,850	923	11,600	1353	17,000	322	40	-0.12	-0.605	120
N42H	1300	13,000	955	12,000	1353	17,000	330	41	-0.12	-0.605	120
N45H	1350	13,500	971	12,200	1353	17,000	354	44	-0.12	-0.605	120
N48H	1390	13,900	1011	12,700	1353	17,000	378	48	-0.12	-0.605	120
N50H	1415	14,150	1035	13,000	1274	16,000	390	49	-0.12	-0.605	120
N30SH	1125	11,250	811	10,200	1592	20,000	243	31	-0.12	-0.535	150
N33SH	1175	11,750	844	10,600	1592	20,000	267	34	-0.12	-0.535	150
N35SH	1210	12,100	876	11,000	1592	20,000	283	35	-0.12	-0.535	150
N38SH	1260	12,600	907	11,400	1592	20,000	307	39	-0.12	-0.535	150
N40SH	1285	12,850	939	11,800	1592	20,000	322	40	-0.12	-0.535	150
N42SH	1310	13,100	955	12,000	1592	20,000	330	41	-0.12	-0.535	150
N45SH	1350	13,500	979	12,300	1592	20,000	354	44	-0.12	-0.535	150
N48SH	1390	13,900	995	12,500	1512	19,000	374	47	-0.12	-0.535	150
N28UH	1075	10,750	764	9,600	1990	25,000	227	29	-0.12	-0.465	180
N30UH	1125	11,250	812	10,200	1990	25,000	243	31	-0.12	-0.465	180
N33UH	1175	11,750	852	10,700	1990	25,000	267	34	-0.12	-0.465	180
N35UH	1210	12,100	860	10,080	1990	25,000	283	35	-0.12	-0.465	180
N38UH	1260	12,600	876	11,000	1990	25,000	307	39	-0.12	-0.465	180
N40UH	1285	12,850	915	11,500	1990	25,000	318	40	-0.12	-0.465	180
N42UH	1310	13,100	955	12,000	1990	25,000	330	41	-0.12	-0.465	180
N45UH	1350	13,500	955	12,500	1910	24,000	358	45	-0.12	-0.465	180
N28EH	1085	10,850	780	9,800	2388	30,000	227	29	-0.12	-0.42	200
N30EH	1125	11,250	812	10,200	2388	30,000	243	31	-0.12	-0.42	200
N33EH	1165	11,650	820	10,300	2388	30,000	267	34	-0.12	-0.42	200
N35EH	1200	12,000	836	10,500	2388	30,000	279	35	-0.12	-0.42	200
N38EH	1235	12,350	899	11,300	2388	30,000	303	38	-0.12	-0.42	200
N40EH	1270	12,700	915	11,500	2388	30,000	314	39	-0.12	-0.42	200
N28AH	1075	10,750	780	9,800	2706	34,000	223	28	-0.12	-0.393	220
N30AH	1120	11,200	812	10,200	2706	34,000	239	30	-0.12	-0.393	220
N35AH	1195	11,950	883	11,100	2706	34,000	275	35	-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:	Br	Br	HcB	HcB	HcJ	HcJ	BHmax	BHmax	Rev. 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
G45SH	1350	13,500	979	12,300	1592	20,000	354	44	-0.12	-0.549	150
G48SH	1390	13,900	1011	12,700	1592	20,000	374	47	-0.12	-0.549	150
G50SH	1425	14,250	836	10,500	1592	20,000	390	49	-0.12	-0.549	150
G52SH	1440	14,400	1067	13,400	1592	20,000	402	51	-0.12	-0.549	150
G55SH	1460	14,600	1083	13,600	1512	19,000	418	53	-0.12	-0.549	150
G57SH	1480	14,800	1098	13,800	1512	19,000	426	54	-0.12	-0.549	150
GB48SH	1390	13,900	1011	12,700	1512	22,000	374	47	-0.12	-0.549	150
GB50SH	1425	14,250	836	10,500	1751	22,000	390	49	-0.12	-0.549	150
GB52SH	1440	14,400	1067	13,400	1751	22,000	402	51	-0.12	-0.549	150
GB55SH	1460	14,600	1083	13,600	1751	21,000	418	53	-0.12	-0.549	150
G38UH	1260	12,600	876	11,000	1990	25,000	306.5	39	-0.12	-0.51	180
G40UH	1270	12,700	915	11,500	1990	25,000	318	40	-0.12	-0.51	180
G42UH	1310	13,100	955	12,000	1990	25,000	330	41	-0.12	-0.465	180
G45UH	1350	13,500	979	12,300	1990	25,000	354	44	-0.12	-0.465	180
G48UH	1390	13,900	1011	12,700	1990	25,000	374	47	-0.12	-0.465	180
G50UH	1410	14,100	1051	13,200	1990	25,000	386	49	-0.12	-0.465	180
G52UH	1430	14,300	1067	13,400	1990	25,000	394	50	-0.12	-0.51	180
G54UH	1450	14,500	1075	13,500	1910	24,000	418	53	-0.12	-0.51	180
GB42UH	1310	13,100	955	12,000	2149	27,000	330	41	-0.12	-0.465	180
GB45UH	1350	13,500	979	12,300	2149	27,000	354	44	-0.12	-0.465	180
GB48UH	1390	13,900	1011	12,700	2419	27,000	374	47	-0.12	-0.465	180
GB50UH	1410	14,100	1051	13,200	2449	27,000	386	49	-0.12	-0.465	180
GB52UH	1430	14,300	1067	13,400	1990	25,000	394	50	-0.12	-0.51	180
G30EH	1125	11,250	812	10,200	2388	30,000	243	31	-0.12	-0.472	200
G33EH	1165	11,650	820	10,300	2388	30,000	267	34	-0.12	-0.472	200
G35EH	1200	12,000	836	10,500	2388	30,000	279	35	-0.12	-0.472	200
G38EH	1260	12,600	876	11,000	2388	30,000	306.5	39	-0.12	-0.472	200
G40EH	1270	12,700	915	11,500	2388	30,000	318	40	-0.12	-0.472	200
G42EH	1310	13,100	955	12,000	2388	30,000	330	41	-0.12	-0.472	200
G44EH	1310	13,100	971	12,200	2388	30,000	338	43	-0.12	-0.472	200
G46EH	1360	13,600	1011	12,700	2388	30,000	362	46	-0.12	-0.472	200
G48EH	1385	13,850	1027	12,900	2388	30,000	370	47	-0.12	-0.472	200
GB38EH	1260	12,600	876	11,000	2547	32,000	306.5	40	-0.12	-0.472	200
GB40EH	1285	12,850	915	11,500	2547	32,000	318	40	-0.12	-0.472	200
GB44EH	1310	13,100	971	12,200	2547	32,000	338	42	-0.12	-0.472	200
GB46EH	1360	13,600	1011	12,700	2547	32,000	362	45	-0.12	-0.472	200
G30AH	1125	11,250	812	10,200	2706	34,000	243	31	-0.12	-0.449	220
G33AH	1165	11,650	820	10,300	2706	34,000	267	34	-0.12	-0.449	220
G35AH	1200	12,000	836	10,500	2706	34,000	279	35	-0.12	-0.449	220
G38AH	1260	12,600	876	11,000	2706	34,000	306.5	39	-0.12	-0.449	220
G40AH	1270	12,700	915	11,500	2706	34,000	318	40	-0.12	-0.449	220
GS38EH	1250	12,500	923	11,600	2786	35,000	298.5	38	-0.12	-0.472	200
GS40EH	1275	12,750	955	12,000	2786	35,000	322	40	-0.12	-0.472	200
GS44EH	1320	13,200	979	12,300	2786	35,000	346	43	-0.12	-0.472	200
GSB38EH	1235	12,350	915	11,500	2945	37,000	306.5	39	-0.12	-0.472	200
GSB40EH	1275	12,750	955	12,000	2945	37,000	323.5	41	-0.12	-0.472	200

Product Neodymium Iron Boron Magnets

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MAXIMUM USE TEMPERATURE AND CORROSION

AVAILABLE NEO GRADES

Grain Boundary Diffusion (GBD)

Available Grain Boundary Diffused Neo Grades

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