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Stable Performance Sintered Neodymium NdFeB Magnets N35-N52 Rare Earth Magnets

Introduction

Neodymium Iron Boron (NdFeB) or Neodymium magnets are extremely strong for their size. Shapes include rings, blocks, discs and custom.

To prevent unwanted oxidation, neodymium magnets are usually finished with a zinc, nickel or epoxy coating.

Manufacturing - In general, the elements are melted together and milled into a powder that is dry-pressed to shape in the presence of a magnetic field.

The material is then sintered, ground to dimension, magnetized and tested. They are called “rare earth” magnets because the elements of neodymium are classified as such in the lanthanides section of the Periodic Table of the Elements.

Physical Properties of Sintered Neodymium Magnet

Parameter Name	Parameter Values	Unit
Curie Temperature	310～380	℃
Relative Recoil Permeability	1.02～1.05
Reversible Temperature Coefficient of Br (20~100℃)	-0.09～-0.13	%/℃
Reversible Temperature Coefficient of Hcj (20~100℃)	-0.4～-0.7	%/℃
Density	7.50～7.70	g/cm³
Vickers Hardness	550～700
Bending Strength	-0.09～-0.13	MPa
Tensile Strength	≥80	MPa
Compressive Strength	800 ~1050	MPa
Electric Resistivity	150	μΩ·cm
Thermal Conductivity	8～10	W/(M·℃)
Coefficient of Thermal Expansion (Parallel to the orientation)	5	10^-6/K
Coefficient of Thermal Expansion (vertical to the orientation)	-1.5	10^-6/K
Young's Modulus	150～200	GPa
Specific Heat(20℃～320℃)	3.0～4.6	J/(g·k)
weight loss(low weight loss products)	≤2	mg/cm²

Magnetic Properties of Sintered Neodymium Magnet

Grade		Remanence		Coercivity		Intrinsic Coercivity		Max Energy Product		Working Temp
Grade		(Br)		(HcB)		(HcJ)		(BH)max		Tw
		KGs	T	KOe	KA/m	KOe	KA/m	MGOe	KJ/m³	℃
N Series	N35	11.7-12.2	1.17-1.22	≥10.9	≥868	≥12	≥955	33-36	263-287	≤80
	N38	12.2-12.5	1.22-1.25	≥11.3	≥899	≥12	≥955	36-39	287-310	≤80
	N40	12.5-12.8	1.25-1.28	≥11.4	≥907	≥12	≥955	38-41	302-326	≤80
	N42	12.8-13.2	1.28-1.32	≥11.5	≥915	≥12	≥955	40-43	318-342	≤80
	N45	13.2-13.8	1.32-1.38	≥11.6	≥923	≥12	≥955	43-46	342-366	≤80
	N48	13.8-14.2	1.38-1.42	≥11.6	≥923	≥12	≥955	46-49	366-390	≤80
	N50	14.0-14.5	1.40-1.45	≥10.0	≥796	≥11	≥876	48-51	382-406	≤60
	N52	14.3-14.8	1.43-1.48	≥10.0	≥796	≥11	≥876	50-53	398-422	≤60
M Series	35M	11.7-12.2	1.17-1.22	≥10.9	≥868	≥14	≥1114	33-36	263-287	≤100
	38M	12.2-12.5	1.22-1.25	≥11.3	≥899	≥14	≥1114	36-39	287-310	≤100
	40M	12.5-12.8	1.25-1.28	≥11.6	≥923	≥14	≥1114	38-40	302-326	≤100
	42M	12.8-13.2	1.28-1.32	≥12.0	≥955	≥14	≥1114	40-43	318-342	≤100
	45M	13.2-13.8	1.32-1.38	≥12.5	≥955	≥14	≥1114	43-46	342-366	≤100
	48M	13.6-14.3	1.36-1.43	≥12.9	≥1027	≥14	≥1114	46-49	366-390	≤100
	50M	14.0-14.5	1.40-1.45	≥13.0	≥1033	≥14	≥1114	48-51	382-406	≤100
	52M	14.3-14.8	1.43-1.48	≥13.0	≥995	≥14	≥1114	50-52	398-414	≤100
H Series	33H	11.3-11.7	1.13-1.17	≥10.6	≥844	≥17	≥1353	31-34	263-287	≤120
	35H	11.7-12.2	1.17-1.21	≥10.9	≥869	≥17	≥1353	33-36	263-287	≤120
	38H	12.2-12.5	1.22-1.25	≥11.3	≥899	≥17	≥1353	36-39	287-310	≤120
	40H	12.5-12.8	1.25-1.28	≥11.6	≥923	≥17	≥1353	38-41	302-326	≤120
	42H	12.8-13.2	1.28-1.32	≥12.0	≥955	≥17	≥1353	40-43	318-342	≤120
	45H	13.0-13.6	1.30-1.36	≥12.1	≥963	≥17	≥1353	43-46	326-358	≤120
	48H	13.7-14.3	1.37-1.43	≥12.5	≥955	≥17	≥1274	46-49	366-390	≤120
SH Series	30SH	10.8-11.3	1.08-1.13	≥10.1	≥804	≥20	≥1592	28-31	233-247	≤150
	33SH	11.3-11.7	1.13-1.17	≥10.6	≥844	≥20	≥1592	31-34	247-271	≤150
	35SH	11.7-12.2	1.17-1.22	≥11.0	≥876	≥20	≥1592	33-36	263-287	≤150
	38SH	12.2-12.5	1.22-1.25	≥11.4	≥907	≥20	≥1592	36-39	287-310	≤150
	40SH	12.5-12.8	1.25-1.28	≥11.8	≥939	≥20	≥1592	38-41	302-326	≤150
	42SH	12.8-13.2	1.28-1.32	≥12.4	≥987	≥20	≥1592	40-43	318-342	≤150
	45SH	13.2-13.8	1.32-1.38	≥12.6	≥1003	≥20	≥1592	43-46	342-366	≤150
	48SH	13.7-14.3	1.37-1.43	≥12.6	≥1003	≥20	≥1592	46-49	366-390	≤150
UH Series	30UH	10.8-11.3

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Categories	Sintered Neodymium Magnet
Certification:	ISO9001
Price:	As negotiation
MOQ:	100pcs
Packaging Details:	cartons,pallets
Delivery Time:	20-25days
Payment Terms:	T/T L/C
Supply Ability:	100 tons per month for NdFeB magnet
Magnetic Performance:	Stable
Corrosion Resistance:	High
Temperature Resistance:	High
Grade:	N35-N52
Pull Force:	High
Application:	Widely Used