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NdFeB magnet

Product > Maget > NdFeB magnet

NdFeB magnet

Neodymium(Nd)-Iron(Fe)-Boron(B) is the third generation of Rare Earth Magnet, it is the most powerful magnet in the world at present, its maximum energy product is up to 48 MGOe. Due to its excellent performance and reasonable price, it has been developed rapidly and widely applied to motor, permanent magnet meter, electronic industry, automobile industry, oil industry, acoustics equipment, magnetic suspension system and so on.

NdFeB is very easy to be rusted and oxidated in the air, so the surface treatments is necessary in order to hold close mechanical tolerances, such as: Zine coating, Nickel coating, Gold coating, electrophoretic coating, epoxy resin coating, passivation (temporary surface) etc.

Physical properties of Sintered NdFeB

Item	Unit	Value
Temperature Coefficient of Br	%/°C	-0.11
Density	G/cm³	7.3-7.6
Vickers Hardness	Hv	600
Tensile Strength	kg/mm²	8
Specific Heat	Cak(kg°C)	0.12k
Young’s Modulus	N/m²	1.6x10¹¹
Poisson’s Ratio		0.24
Curie Temperature	°C	310-340
Electrical Resistivity	Ω.cm	144

Typical magnetic properties if sintered NdfeB

Grade		Remanence		Coercive force		Intrinsic coercive force		Maximum energy product		Tw
		Br		HcB (min.)		HcJ (mim.)		(BH)max		Tw
		T	kOe	kA/m	kOe	kA/m	kOe	kJ/m³	MGOe	℃
1	N33	1.13 –1.17	11.3 – 11.7	836	10.5	955	12	247 - 270	31 - 34	≤80
2	N35	1.17 – 1.22	11.7 – 12.2	868	10.9	955	12	263 - 287	33 - 36	≤80
3	N38	1.22 – 1.25	12.2 – 12.5	899	11.3	955	12	287 - 310	36 - 39	≤80
4	N40	1.25 – 1.28	12.5 – 12.8	907	11.4	955	12	302 - 326	38 - 41	≤80
5	N42	1.28 – 1.32	12.8 – 13.2	915	11.5	955	12	318 - 342	40 - 43	≤80
6	N45	1.32 – 1.38	13.2 – 13.8	923	11.6	955	12	342 - 366	43 - 46	≤80
7	N48	1.38 – 1.42	13.8 – 14.2	796	10.0	955	12	366 - 390	46 - 49	≤80
8	N50	1.40 – 1.45	14.0 – 14.5	836	10.5	876	11	382 - 405	48 - 51	≤80
9	N52	1.43 – 1.48	14.3 – 14.8	836	10.5	876	11	398 - 421	50 - 53	≤80
10	N55	1.47 – 1.53	14.7 – 15.3	836	10.5	876	11	413 - 445	53 - 56	≤80
11	N33M	1.13 – 1.17	11.3 – 11.7	836	10.5	1114	14	247 - 270	31 - 34	≤100
12	N35M	1.17 – 1.22	11.7 – 12.2	868	10.9	1114	14	263 - 287	33 - 36	≤100
13	N38M	1.22 – 1.25	12.2 – 12.5	899	11.3	1114	14	287 - 310	36 - 39	≤100
14	N40M	1.25 – 1.28	12.5 – 12.8	923	11.6	1114	14	302 - 326	38 - 41	≤100
15	N42M	1.28 – 1.32	12.8 – 13.2	955	12.0	1114	14	318 - 342	40 - 43	≤100
16	N45M	1.32 – 1.38	13.2 – 13.9	995	12.5	1114	14	342 - 366	43 - 46	≤100
17	N48M	1.36 – 1.43	13.6 – 14.3	1019	12.8	1114	14	366 - 390	46 - 49	≤100
18	N50M	1.40 – 1.43	14.0 – 14.3	1035	13.0	1114	14	382 - 405	48 - 51	≤100
19	N52M	1.43 – 1.47	14.3 – 14.7	995	12.5	1114	14	398 - 421	50 - 53	≤100
20	N55M	1.47 – 1.53	14.7 – 15.3	836	10.5	1035	13	413 - 445	53 - 56	≤100
21	N33H	1.13 – 1.17	11.3 – 11.7	836	10.5	1353	17	247 - 270	31 - 34	≤120
22	N35H	1.17 – 1.22	11.7 – 12.2	868	10.9	1353	17	263 - 287	33 - 36	≤120
23	N38H	1.22 – 1.25	12.2 – 12.5	899	11.3	1353	17	287 - 310	36 - 39	≤120
24	N40H	1.25 – 1.28	12.5 – 12.8	923	11.6	1353	17	302 - 326	38 - 41	≤120
25	N42H	1.28 – 1.32	12.8 – 13.2	955	12.0	1353	17	318 - 342	40 - 43	≤120
26	N45H	1.32 – 1.36	13.2 – 13.6	963	12.1	1353	17	342 - 366	43 - 46	≤120
27	N48H	1.36 – 1.43	13.6 – 14.3	971	12.2	1274	16	366 - 390	46 - 49	≤120
28	N50H	1.40 – 1.45	14.0 – 14.5	1059	13.3	1274	16	382 - 405	48 - 51	≤120
29	N52H	1.42 – 1.48	14.2 – 14.8	1083	13.6	1274	16	398 - 421	50 - 53	≤120
30	N33SH	1.13 – 1.18	11.3 – 11.8	844	10.6	1592	20	247 - 270	31 - 34	≤150
31	N35SH	1.17 – 1.22	11.7 – 12.2	876	11.0	1592	20	263 - 287	33 - 36	≤150
32	N38SH	1.22 – 1.25	12.2 – 12.5	907	11.4	1592	20	287 - 310	36 - 39	≤150
33	N40SH	1.25 – 1.28	12.5 – 12.8	939	11.8	1592	20	302 - 326	38 - 41	≤150
34	N42SH	1.28 – 1.32	12.8 – 13.2	971	12.2	1592	20	318 - 342	40 - 43	≤150
35	N45SH	1.32 – 1.36	13.2 – 13.6	979	12.3	1592	20	342 - 366	43 - 46	≤150
36	N48SH	1.36 – 1.42	13.6 – 14.2	995	12.5	1512	19	366 - 390	46 - 49	≤150
37	N50SH	1.40 – 1.45	14.0 – 14.5	1075	13.5	1512	19	382 - 405	48 - 51	≤150
38	N52SH	1.42 – 1.48	14.2 – 14.8	1098	13.8	1512	19	398 - 421	50 - 53	≤150
39	N28UH	1.02 – 1.08	10.2 – 10.8	764	9.6	1990	25	207 - 231	26 - 29	≤180
40	N30UH	1.08 – 1.14	10.8 – 11.4	812	10.2	1990	25	223 - 254	28 - 32	≤180
41	N33UH	1.13 – 1.18	11.3 – 11.8	852	10.7	1990	25	247 – 270	31 - 34	≤180
42	N35UH	1.18 – 1.22	11.8 – 12.2	860	10.8	1990	25	263 - 287	33 - 36	≤180
43	N38UH	1.22 – 1.25	12.2 – 12.5	876	11.0	1990	25	287 - 310	36 - 39	≤180
44	N40UH	1.25 – 1.28	12.5 – 12.8	915	11.5	1990	25	302 - 326	38 - 41	≤180
45	N42UH	1.28 – 1.32	12.8 – 13.2	971	12.2	1990	25	310 - 342	30 - 43	≤180
46	N45UH	1.32 – 1.36	13.2 – 13.6	979	12.3	1910	24	342 - 366	43 - 46	≤180
47	N48UH	1.36 – 1.40	13.6 – 14.0	1059	13.3	1910	24	366 - 390	46 - 49	≤180
48	N28EH	1.04 – 1.08	10.4 – 10.8	780	9.8	2388	30	207 - 231	26 - 29	≤200
49	N30EH	1.08 – 1.13	10.8 – 11.3	812	10.2	2388	30	223 - 254	28 - 32	≤200
50	N33EH	1.13 – 1.17	11.3 – 11.7	820	10.3	2388	30	247 - 270	31 - 34	≤200
51	N35EH	1.17 – 1.22	11.7 – 12.2	836	10.5	2388	30	263 - 287	33 - 36	≤200
51	N38EH	1.22 – 1.25	12.2 – 12.5	915	11.5	2388	30	279 – 310	35 - 39	≤200
52	N40EH	1.25 – 1.28	12.5 – 12.8	915	11.5	2388	30	302 - 326	38 - 41	≤200
53	N42EH	1.28 – 1.32	12.8 – 13.2	971	12.2	2388	30	310 - 342	39 - 43	≤200
54	N45EH	1.32 – 1.36	13.2 – 13.6	979	12.3	2388	30	342 - 366	43 - 46	≤200
55	N28AH	1.02 – 1.09	10.2 – 10.9	780	9.8	2706	34	199 - 231	25 - 29	≤230
56	N30AH	1.07 – 1.13	10.7 – 11.3	812	10.2	2706	34	215 - 247	27 - 31	≤230
57	N33AH	1.11 – 1.17	11.1 – 11.7	836	10.5	2706	34	239 - 271	30 - 34	≤230

Remark: The above mentioned data is tested at the room temperature. The maximum working temperature will vary with L/D (Length and Diameter ratio), coating and environmental facts.

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