Sintered NdFeB Magnet

Neodymium Iron Boron (NdFeB), the most powerful Rare Earth magnet available today, possesses high energranging from 8MGOe to 52MGOe and wonderful coercive force. As the third generation of Rare Earth permanent magnet, NdFeB products are quite a bit less expensive, and are mechanically stronger and less brittle than SmCo, also density of NdFeB products is about 13% smaller than SmCo products. Because NdFeB magnets are more prone to oxidation than any other magnet alloy, for most applications, coating or plating the magnets is recommended.

Super-Strength Rare Earth Magnet----Sintered NdFeB magnets, have the characteristics of:

Extreme strong Br Resident induction.

Excellent demagnetization resistance capability.

Good Price relative to its high magnetic properties.

Coating is needed for NdFeB.

Surface Treatment Method: Type Information
Metallic Zinc, Nickel, Nickel+Nickel, Copper+Nickel, Nickel+Copper+Nickel
Gold, Organic Epoxy, Nickel+Epoxy coating
Temporary Surface: Passivation

Sintered NdFeB Properties
TYPE	Remanence Br		Coercive force bHc		Intrinsic coercive force iHc		Max. energy product (BH) max		Working MAGNETIC AND PHYSICAL CHARACTERISTICS (NdFeB) Temperature
TYPE	KGs	T	KOe	KA/m	KOe	KA/m	MGOe	KJ/m³	°C
N-30	10.8-11.2	1.08-1.12	9.8-10.5	780-836	≥12	≥955	28-30	223-239	≤80
N-33	11.4-11.7	1.14-1.17	10.5-11.0	836-876	≥12	≥955	31-33	247-263	≤80
N-35	11.7-12.1	1.17-1.21	10.8-11.5	860-915	≥12	≥955	33-35	263-279	≤80
N-36	11.9-12.2	1.19-1.22	10.8-11.5	860-915	≥12	≥955	34-36	271-287	≤80
N-38	12.2-12.6	1.22-1.26	10.8-11.5	860-915	≥12	≥955	36-38	287-303	≤80
N-40	12.6-12.9	1.26-1.29	10.5-11.0	836-876	≥12	≥955	38-40	303-318	≤80
N-42	12.9-13.2	1.29-1.32	10.5-11.0	836-876	≥12	≥955	40-42	318-334	≤80
N-43	13.0-13.3	1.30-1.33	10.5-11.0	836-876	≥12	≥955	41-43	326-342	≤80
N-45	13.3-13.7	1.33-1.37	10.5-11.0	836-876	≥12	≥965	43-45	342-358	≤80
N-48	13.8-14.2	1.38-1.42	≥10.5	≥835	≥12	≥955	46-49	366-390	≤80
N-50	13.8-14.5	1.38-1.45	≥10.5	≥835	≥11	≥955	47-51	374-406	≤80
N-52	14.3-14.8	1.43-1.48	≥10.8	≥860	≥11	≥876	50-53	398-422	≤80
N-27M	10.2-10.6	1.02-1.06	9.6-10.1	764-804	≥15	≥1194	25-27	199-215	≤100
N-30M	10.8-11.2	1.08-1.12	10.1-10.6	804-844	≥15	≥1194	28-30	223-239	≤100
N-33M	11.4-11.7	1.14-1.17	10.5-11.0	844-884	≥15	≥1194	31-33	247-263	≤100
N-35M	11.7-12.1	1.17-1.21	10.8-11.5	860-915	≥15	≥1114	33-35	263-279	≤100
N-36M	11.9-12.2	1.19-1.22	11.1-11.6	884-923	≥15	≥1194	34-36	271-287	≤100
N-38M	12.2-12.6	1.22-1.26	10.8-11.5	860-915	≥14	≥1114	36-38	287-303	≤100
N-40M	12.6-12.9	1.26-1.29	10.8-11.5	860-915	≥14	≥1114	38-40	303-318	≤100
N-42M	12.9-13.2	1.29-1.32	10.8-11.4	860-907	≥14	≥1114	40-42	318-334	≤100
N-45M	13.3-13.7	1.33-1.37	10.8-11.4	860-907	≥17	≥1114	43-45	334-358	≤100
N-48M	13.6-14.0	1.36-1.40	≥11.8	≥939	≥14	≥1114	46-49	366-390	≤100
N-50M	14.0-14.5	1.40-1.45	≥13.0	≥1033	≥14	≥1114	48-51	382-406	≤100
N-27H	10.2-10.6	1.02-1.06	9.6-10.1	764-804	≥17	≥1353	25-27	199-215	≤120
N-30H	10.8-11.2	1.08-1.12	10.1-10.6	804-844	≥17	≥1353	28-30	223-239	≤120
N-33H	11.4-11.7	1.14-1.17	10.6-11.1	844-884	≥17	≥1353	31-33	247-263	≤120
N-35H	11.7-12.1	1.17-1.21	10.8-11.5	860-915	≥17	≥1353	33-35	263-279	≤120
N-36H	11.9-12.2	1.19-1.22	11.1-11.6	884-923	≥17	≥1353	34-36	271-287	≤120
N-38H	12.2-12.6	1.22-1.26	11.5-12.0	915-955	≥17	≥1353	36-38	287-303	≤120
N-40H	12.6-12.9	1.26-1.29	11.5-12.0	915-955	≥17	≥1353	38-40	303-318	≤120
N-42H	12.9-13.2	1.29-1.32	11.5-12.0	915-955	≥17	≥1353	40-42	318-334	≤120
N-45H	13.2-13.8	1.32-1.38	≥12.0	955	≥17	≥1353	42-46	335-366	≤120
N-46H	13.3-13.8	1.33-1.38	≥12.2	972	≥16	≥1274	44-47	350-374	≤120
N-48H	13.6-14.3	1.36-1.43	≥12.5	995	≥16	≥1274	46-49	366-390	≤120
N-27SH	10.2-10.6	1.02-1.06	9.6-10.1	764-804	≥20	≥1592	25-27	199-215	≤150
N-30SH	10.8-11.2	1.08-1.12	10.1-10.6	804-844	≥20	≥1592	28-30	223-239	≤150
N-33SH	11.4-11.7	11.4-11.7	10.6-11.1	844-884	≥20	≥1592	31-33	247-263	≤150
N-35SH	11.7-12.1	1.17-1.21	10.8-11.5	860-915	≥20	≥1595	33-35	263-279	≤150
N-38SH	12.1-12.5	1.21-1.25	10.8-11.5	860-915	≥20	≥1592	36-38	287-302	≤150
N-40SH	12.6-12.9	1.26-1.29	10.8-11.5	860-915	≥20	≥1592	38-40	303-318	≤150
N-42SH	12.8-13.2	1.28-1.32	≥11.8	≥939	≥20	≥1672	40-43	320-343	≤150
N-45SH	13.2-13.8	1.32-1.38	≥12.6	≥1003	≥20	≥1592	43-46	342-366	≤150
N25UH	9.8-10.2	0.98-1.02	9.2-9.6	732-764	≥25	≥1990	23-25	183-199	≤180
N28UH	10.4-10.8	1.04-1.08	9.8-10.2	780-812	≥25	≥1990	26-28	207-223	≤180
N30UH	10.8-11.3	1.08-1.13	≥10.2	≥812	≥25	≥1990	28-31	223-247	≤180
N35UH	11.7-12.1	1.17-1.21	10.5-11.2	836-890	≥25	≥1989	33-35	263-278	≤180
N38UH	12.1-12.5	1.21-1.25	≥11.4	≥907	≥25	≥1990	36-39	287-310	≤180
N40UH	12.5-12.8	1.25-1.28	≥11.4	≥907	≥25	≥1990	38-41	302-326	≤180
N28EH	10.4-10.8	1.04-1.08	9.8-10.2	780-812	≥30	≥2387	26-28	207-223	≤200
N30EH	10.8-11.2	1.08-1.12	10.1-10.6	804-844	≥30	≥2387	28-30	223-239	≤200
N35EH	11.7-12.1	1.17-1.21	≥10.2	≥812	≥30	≥2388	33-36	263-287	≤200
N38EH	12.1-12.5	1.21-1.25	≥11.4	≥907	≥30	≥2388	36-39	287-310	≤200
N30AH	10.8-11.3	1.08-1.13	≥10.2	≥812	≥35	≥2785	28-32	223-255	≤220
N33AH	11.2-11.7	1.12-1.17	≥10.2	≥812	≥35	≥2785	31-34	247-271	≤220

Remark: The above mentioned data of magnetic and physical characteristics are given at room temperature

** The open flux irreversible loss of the testing sample at this temperature ≤5%

Other Physical Properties (NdFeB)
Temp.Coeff.of Br:	-0.11%/°C	Temp.Coeff.of iHc:	-0.60%/°C
Density:	7.4~7.6g/cm³	Electrical Resistivity:	144µΩcm
Vickers Hardness:	600HV	Flexural Strength:	25kg/mm
Tensile Strength:	8kg/mm²	Coef. of Thermal Expansion:	4x10^-6/°C
Specific Heat:	0.12kcal/(kg.°C)	Thermal conductivity:	7.7kcal/m.h.°C
Young's Modulus:	1.6×10¹¹N/m²	Rigidity:	0.64N/m²
Poisson's Ratio:	0.24	Compressibility:	9.8x10^-12m²/N
Curie Temperature:	310~340°C