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NdFeB magnets are mainly made from Neodymium, Iron, Boron, with excellent magnetic property, abundant raw material and reasonable prices, NdFeB magnets can be used as an ideal magnets in mini-motor, permanent magnet instrument, electronic industry, auto industry, petro-chemical industry, nuclear magnetic resonance, sound device magnetic suspension system, magnetic transmission machine and magnetic therapy apparatus etc.. The disadvantage of NdFeB magnets is its weak corrosion and oxidation resistance. its surface usually is treated with some special methods. The surface treatment method include Zinc, Nickel, Tin, Silver, Gold plating and phosphor and spray epoxy resin etc..

Magnetic Properties of Sintered NdFeB
Properties		Remanence				Coercive force				Intrinsic coercive		Maximum energy product				Working
		Remanence				Coercive force				Intrinsic coercive		Maximum energy product				Working
		Br				Hcb				Force,Hcj		(BH)max				temp
No	Grade	KGs		T		KOe		KA/m		KOe	KA/m	MGOe		KJ/m3		B/レ 0H=-2
	Grade	KGs		T		KOe		KA/m				MGOe		KJ/m3		B/レ 0H=-2
		Nom.	Min.	Nom.	Min.	Nom.	Min.	Nom.	Min.			Nom.	Min.	Nom.	Min.	∩
1	N30	11.2	10.8	1.12	1.08	10.5	10	836	796	>12	>955	30	28	239	223	÷80
2	N35	12	11.7	1.2	1.17	11.5	10.8	915	860	>12	>955	35	33	279	263	÷80
3	N38	12.6	12.2	1.26	1.22	11.5	11.3	915	900	>12	>955	38	36	303	287	÷80
4	N40	12.9	12.6	1.29	1.26	11.6	11.4	924	908	>12	>955	40	38	318	303	÷80
5	N42	13.1	12.9	1.31	1.29	11.8	11.5	939	915	>12	>955	42	40	342	326	÷80
6	N45	13.6	13.3	1.36	1.33	12	11.6	955	924	>12	>955	45	43	358	342	÷80
7	N48	14	13.8	1.4	1.38	10.8	10.2	860	810	>11	>875	48	46	383	367	÷80
8	N50	14.3	14.1	1.43	1.41	10.8	10	860	794	>11	>875	50	48	398	383	÷80
9	N30M	11.2	10.8	1.12	1.08	10.5	10	836	794	>14	>1114	30	28	239	223	÷100
10	N35M	12	11.7	1.2	1.17	11.5	10.9	915	868	>14	>1114	35	33	279	263	÷100
11	N38M	12.6	12.2	1.26	1.22	11.8	11.3	939	900	>14	>1114	38	36	303	287	÷100
12	N40M	12.9	12.6	1.29	1.26	12	11.6	955	924	>14	>1114	40	38	318	303	÷100
13	N42M	13.2	12.9	1.32	1.29	12.4	12	987	955	>14	>1114	42	40	342	326	÷100
14	N45M	13.5	13.3	1.35	1.33	12.6	12.2	1003	971	>14	>1114	45	43	358	342	÷100
15	N48M	14	13.8	1.4	1.38	13.3	12.9	1059	1027	>14	>1114	48	46	383	367	÷100
16	N30H	11.2	10.8	1.12	1.08	10.5	10	836	794	>17	>1353	30	28	239	223	÷120
17	N33H	11.7	11.4	1.17	1.14	11	10.5	876	836	>17	>1353	33	31	263	247	÷120
18	N35H	12	11.7	1.2	1.17	11.5	10.9	915	868	>17	>1353	35	33	279	263	÷120
19	N38H	12.6	12.2	1.26	1.22	11.8	11.3	939	900	>17	>1353	38	36	303	287	÷120
20	N40H	12.8	12.6	1.28	1.26	12	11.6	955	924	>17	>1353	40	38	318	303	÷120
21	N42H	13	12.8	1.3	1.28	12.4	12	987	955	>17	>1353	42	40	342	326	÷120
22	N45H	13.5	13.3	1.35	1.33	12.6	12.2	1003	971	>17	>1353	45	43	358	342	÷120
23	N30SH	11.2	10.8	1.12	1.08	10.5	10.1	836	804	>20	>1595	30	28	239	223	÷150
24	N33SH	11.7	11.4	1.17	1.14	11	10.6	876	844	>20	>1595	33	31

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