NdFeB Magnet

performance

With very high magnetic energy product and coercivity, known as “King of magnet”

COST performance

Ndfeb magnet is cost-effective compared to samarium cobalt.

NdFeB magnet

Neodymium magnets (also known as NdFeB, NIB or Neo magnet) have higher remanence, much higher coercivity and energy product.

Developed independently in 1984 by General Motors and Sumitomo Special Metals, neodymium magnets are the strongest type of permanent magnet available commercially.

application fileds

It is widely used in new energy vehicles, wind power generation, industrial motors, consumer electronics, medical devices and other fields.

Good mechanical properties

Good mechanical properties, easy to process into ring, round, square, tile and a variety of special-shaped sub-material products.

NdFeB Performance Table

牌号 Grade		剩磁 (Br)Remanence				内禀矫顽力(Hcj) Intrinic Coercivity		矫顽力 (Hcb) Coercivity		最大磁能积 (BH)max Max Energy Product				密度 Density	最大工作温度 Max Working Temperature
		T		kGs		kA/m	kOe	kA/m	kOe	kJ/m3		MGOe		g/cm3	℃
		Max	Min	Max	Min	Min	Min	Min	Min	Max	Min	Max	Min	Min	℃
N	N56	1.51	1.47	15.1	14.7	876	11	836	10.5	454	414	57	52	7.5	80
	N54	1.49	1.45	14.9	14.5	955	12	836	10.5	437	406	55	51	7.5	80
	N52	1.46	1.42	14.6	14.2	955	12	836	10.5	422	390	53	49	7.5	80
	N50	1.44	1.39	14.4	13.9	955	12	860	10.8	406	374	51	47	7.5	80
	N48	1.43	1.37	14.3	13.7	955	12	860	10.8	390	358	49	45	7.5	80
	N45	1.37	1.32	13.7	13.2	955	12	860	10.8	366	342	46	43	7.5	80
	N42	1.32	1.28	13.2	12.8	955	12	860	10.8	342	318	43	40	7.5	80
	N40	1.28	1.25	12.8	12.5	955	12	860	10.8	326	302	41	38	7.5	80
	N38	1.25	1.22	12.5	12.3	955	12	860	10.8	310	287	39	36	7.5	80
	N35	1.22	1.17	12.2	11.7	955	12	860	10.8	287	263	36	33	7.5	80
	N33	1.17	1.13	11.7	11.3	955	12	836	10.5	271	247	34	31	7.5	80
	N30	1.13	1.08	11.3	10.8	955	12	796	10	247	223	31	28	7.5	80
M	56M	1.5	1.46	15	14.6	1035	14	995	12.5	446	406	56	51	7.5	100
	54M	1.49	1.44	14.9	14.4	1114	14	1035	13	438	398	55	50	7.5	100
	52M	1.46	1.42	14.6	14.2	1114	14	1035	13	422	382	53	49	7.5	100
	50M	1.44	1.39	14.4	13.9	1114	14	1035	13	406	374	51	47	7.5	100
	48M	1.42	1.37	14.2	13.7	1114	14	1027	12.9	390	358	49	45	7.5	100
	45M	1.37	1.32	13.7	13.2	1114	14	995	12.5	366	342	46	43	7.5	100
	42M	1.32	1.28	13.2	12.8	1114	14	955	12	342	318	43	40	7.5	100
	40M	1.28	1.25	12.8	12.5	1114	14	923	11.6	326	302	41	38	7.5	100
	38M	1.25	1.22	12.5	12.3	1114	14	899	11.3	310	287	39	36	7.5	100
	35M	1.22	1.17	12.2	11.7	1114	14	868	10.9	287	263	36	33	7.5	100
	33M	1.17	1.13	11.7	11.3	1114	14	836	10.5	271	247	34	31	7.5	100
	30M	1.13	1.08	11.3	10.81	1141	14	796	10	247	223	31	28	7.5	100
H	54H	1.49	1.44	14.9	14.4	1353	17	1075	13.5	438	398	55	50	7.5	120
	52H	1.46	1.42	14.6	14.2	1353	17	1059	13.3	422	382	53	48	7.5	120
	50H	1.44	1.39	14.4	13.9	1353	17	1043	13.1	406	374	51	47	7.5	120
	48H	1.42	1.36	14.2	13.6	1353	17	1027	12.9	390	358	49	45	7.5	120
	45H	1.37	1.32	13.7	13.2	1353	17	995	12.5	366	342	46	43	7.5	120
	42H	1.32	1.28	13.2	12.8	1353	17	955	12	342	318	43	40	7.5	120
	40H	1.28	1.25	12.8	12.5	1353	17	923	11.6	326	302	41	38	7.5	120
	38H	1.25	1.22	12.5	12.3	1353	17	899	11.3	310	287	39	36	7.5	120
	35H	1.22	1.17	12.2	11.7	1353	17	868	10.9	287	263	36	33	7.5	120
	33H	1.17	1.13	11.7	11.3	1353	17	836	10.5	271	247	34	31	7.5	120
	30H	1.13	1.08	11.3	10.8	1353	17	796	10	247	223	31	28	7.5	120
SH	54SH	1.49	1.44	14.9	14.4	1592	20	1075	13.5	438	398	55	50	7.5	150
	52SH	1.46	1.42	14.6	14.2	1592	20	1059	13.3	422	390	53	49	7.5	150
	50SH	1.42	1.39	14.2	13.9	1592	20	1043	13.1	406	374	51	47	7.5	150
	48SH	1.4	1.36	14	13.6	1592	20	1035	13	390	358	49	45	7.5	150
	45SH	1.37	1.32	13.7	13.2	1592	20	995	12.5	366	342	46	43	7.5	150
	42SH	1.32	1.28	13.2	12.8	1592	20	955	12	342	318	43	40	7.5	150
	40SH	1.28	1.25	12.8	12.5	1592	20	939	11.8	326	302	41	38	7.5	150
	38SH	1.25	1.22	12.5	12.2	1592	20	907	11.4	310	287	39	36	7.5	150
	35SH	1.22	1.17	12.2	11.7	1592	20	876	11	287	263	36	33	7.5	150
	33SH	1.17	1.13	11.7	11.3	1592	20	844	10.6	271	247	34	31	7.5	150
	30SH	1.13	1.08	11.3	10.8	1592	20	804	10.1	247	223	31	28	7.5	150
UH	48UH	1.4	1.36	14	13.6	1910	24	1031	12.9	390	358	49	45	7.55	180
	45UH	1.36	1.32	13.6	13.2	1990	25	1003	12.6	366	342	46	43	7.55	180
	42UH	1.32	1.28	13.2	12.8	1990	25	971	12.2	342	318	43	40	7.55	180
	40UH	1.28	1.25	12.8	12.5	1990	25	923	11.6	326	302	41	38	7.55	180
	38UH	1.25	1.22	12.5	12.2	1990	25	907	11.4	310	287	39	36	7.55	180
	35UH	1.22	1.17	12.2	11.7	1990	25	860	10.8	287	263	36	33	7.55	180
	33UH	1.17	1.13	11.7	11.3	1990	25	852	10.7	271	247	34	31	7.55	180
	30UH	1.13	1.08	11.3	10.8	1990	25	812	10.2	247	223	31	28	7.55	180
EH	45EH	1.36	1.32	13.6	13.2	2308	29	1003	12.6	366	342	46	43	7.6	200
	42EH	1.32	1.28	13.2	12.8	2388	30	970	12.2	342	318	43	40	7.6	200
	40EH	1.28	1.25	12.8	12.5	2388	30	947	11.9	326	302	41	38	7.6	200
	38EH	1.25	1.22	12.5	12.2	2388	30	915	11.5	310	287	39	36	7.6	200
	35EH	1.22	1.17	12.2	11.7	2388	30	884	11.1	287	263	36	33	7.6	200
	33EH	1.17	1.13	11.7	11.3	2388	30	860	10.8	271	247	34	31	7.6	200
	30EH	1.13	1.08	11.3	10.8	2388	30	820	10.3	247	223	31	28	7.6	200
AH	40AH	1.28	1.25	12.8	12.5	2706	34	947	11.9	326	302	41	38	7.6	230
	38AH	1.25	1.22	12.5	12.2	2786	35	915	11.5	310	287	39	36	7.6	230
	35AH	1.2	1.17	12	11.7	2786	35	883	11.1	287	263	36	33	7.6	230
	33AH	1.17	1.11	11.7	11.1	2786	35	844	10.6	271	239	34	31	7.6	230
	30AH	1.13	1.07	11.3	10.7	2786	35	812	10.2	247	215	31	27	7.6	230
	28AH	1.09	1.02	10.9	10.2	2786	35	772	9.7	231	199	29	25	7.6	230
TH	35TH	1.22	1.17	12.2	11.7	3102	39	867	10.9	287	263	36	33	7.6	250
	33TH	1.17	1.11	11.7	11.1	3182	40	851	10.7	271	239	34	31	7.6	250
	30TH	1.13	1.08	11.3	10.8	3182	40	820	10.3	247	223	31	28	7.6	250

Physical Properties of sintered NdFeB

Physical Properties of Sintered NdFeB
Reversible Temp coeff. Of Br	-0.09~-0.11%/℃
Reversible Temp coeff. Of Hcj	-0.45~-0.75%/℃
Density	7.4~7.7g/cm³
Vickers Hardness	500~600HV
Compressive Strength	1000~1500MPa
Specific Heat	0.12Kcal(Kg.℃)
Young Modulus	150~200GPa
Poisson’s Ratio	0.24
Curie Temperature	310~350℃
Electrical Resistivity	1.4~1.6μΩ·m
Tensile Strength	80~90MPa
Coefficient of Thermal Expansion	(1-4)×10-6℃
Pyroconductivity	8~10W/(m.K)
Stiffness	0.64N/m²
Compression Ratio	9.8*10-12m2/N
Relative Permeability	1.02~1.06
Standard：GB/T 13560-2009

Manufacturing Process

Our technical capability

Grain boundary diffusion process（GBDP）

Ndfeb permanent magnet has a wide range of applications in the fields of new energy, information communication and intelligent manufacturing. The high temperature performance and coercivity of NdFeb magnets are required by electric vehicle driving motor and wind power system generator. Heavy rare earths Tb and Dy can significantly improve the anisotropic field of NdFeb magnets, but reduce the remanence and increase the cost. Grain boundary diffusion technology, which appeared in the early 21st century, is an important development in the field of rare earth permanent magnet manufacturing. By infiltrating heavy rare earth elements or rare earth alloys into the magnet through grain boundary diffusion, it can effectively improve the coercivity of the magnet, greatly reduce the content of heavy rare earth, and improve the cost performance.

advantages of GBDP

Grain boundary diffusion technology can reduce the consumption of heavy rare earth and effectively save heavy rare earth resources. Reduce the cost of magnet production, improve the comprehensive cost performance of products. Compared with the traditional process, the grain boundary diffusion process can produce magnets with higher comprehensive properties, such as52SH、52UH、45EH、42AH，38TH（VH）;some of the magnets Hcj(kOe)+(BH)max(MGOe)＞82.

Demagnetizing Curve

Surface Treatment

Galvanization

Nickel Plating

Epoxy

Gold Plating

Surface treatment Type	Plating code	Color	Thickness	SST	Temp. & Humi.	High-pressure accelerated aging test	Use Temp.
Blue and white zinc	Zn.L	Blue and white	4-15μm	≥24h	/	/	≤160℃
Color zinc	Zn.C	Colourful	4-15μm	≥48h	/	/	≤160℃
Nickel copper nickel(barrel plating)	NiCuNi	Silver	5-20μm	≥48h	500h	48h	≤200℃
Nickel copper nickel (hang plating)	NiCuNi	Silver	5-20μm	≥24h	500h	48h	≤200℃
Nickel Copper Nickel + Tin	NiCuNi+Sn	Silver white	5-20μm	≥72h	500h	96h	≤200℃
Nickel+tin	Ni+Sn	Silver white	5-20μm	≥72h	500h	96h	≤200℃
Nickel+silver	Ni+Ag	Silver	5-20μm	≥72h	72h	96h	≤160℃
Nickel+gold	Ni+Au	Golden	5-20μm	≥72h	500h	96h	≤200℃
Nickel + chemical nickel (hang plating)	Ni+Ap.Ni	Silver	3-20μm	≥24h	500h	48h	≤200℃
Nickel + chemical nickel (barrel plating)	Ni+Ap.Ni	Silver	3-20μm	≥72h	500h	48h	≤200℃
Epoxy	Epoxy	Black, grey	10-30μm	≥72h	72h	200h	≤160℃
Nickel copper + epoxy	NiCu+Epoxy	Black, grey	20-40μm	≥500h	500h	200h	≤160℃
Aluminum	PVD.Al	Silver white	2-15μm	≥100h	500h	200h	≤400℃
Aluminum + epoxy	PVD.Al+Epoxy	black, grey	15-30μm	≥200h	500h	200h	≤160℃
Parylene	Parylene	Colorless and transparent	20-50	≥220h	500h	48h	≤120℃