Rare Earth Neodymium Magnets

As one of the professional industrial magnet manufacturers, we focus on the development and sales of magnetic assemblies, related products involve neodymium pot(cup) magnets, ferrite pot(cup)magnets, rubber-coated(rubberized) pot magnets, salvage fishing magnets, all kinds of magnetic hooks, magnetic holder, and office magnets. These magnetic products can meet the needs of multidisciplinary applications for holding&fixing, salvaging & lifting, mounting, and hanging.

Rare Earth Neodymium Magnets

Rare earth magnets have higher energy products and are known as rare earth strong magnetsor powerful rare earth magnets. As the third generation rare earth magnet, neodymium magnet, also known as NdFeB magnet, is a tetragonal crystal composed of the elements of Nd, Fe, and B. The magnetic energy product BH(max) of rare earth NdFeB magnetsis higher than that of SmCo magnet, it is the most powerful and strongest rare earth industry magnet in the world. It is also the most commonly used rare earth industry magnet.

Application of Sintered Custom Shaped Neodymium Magnets

Thanks to the excellent magnetic properties,sintered neodymium(NdFeB) strongest rare earth magnetmaterials are widely used in electronics, electrical machinery, motors,medical devices, toys, packaging, hardware machinery, aerospace and other fields. The most common application products are permanent magnet motors, loudspeakers, magnetic separators, magnetic fishing and mounting products.

Classification of Rare Earth Neodymium Powerful Magnets

Neodymium(NdFeB) magnet can be classified as sintered NdFeB and bonded NdFeB. Bonded NdFeB rare earth magnetshave magnetism and corrosion resistance in all directions; sintered NdFeB magnet is generally divided into axial magnetized and diametrical magnetized, which is determined according to the required working face.

The sintered neodymium magnet is easy to corrode, and the surface needs to be coated, generally including zinc plating, nickel, environmental protection zinc, environmental protection nickel, nickel-copper-nickel, environmental protection nickel-copper-nickel, and epoxy coating. Meank is a professional manufacturer and supplier of sintered rare earth neodymium strong magnet, which is the strongest magnet in the world. We offer a wide range of NdFeB magnets for sale at a cheap magnet neodymium price. Wholesale is available, bulk buying is welcomed. Contact us and buy custom rare earth magnetsnow!

Magnetic Property/performance of Sintered Rare Earth Strong Industry Magnets Material

MagnetType(Grade)	Remanence (Br)		HcB		HcJ		(B-H)max
	(KGs)	(mT)	(Koe)	(KA/m)	(Koe)	(KA/m)	(MGOe)	(KJ/m3)	℃
N35		1170-1220	≥10.9	≥868	≥12	≥955	33-36	263-287	80℃
N38		1220-1250	≥11.3	≥899	≥12	≥955	36-39	287-310	80℃
N40		1250-1280	≥11.4	≥907	≥12	≥955	38-41	302-326	80℃
N42		1280-1320	≥11.5	≥915	≥12	≥955	40-43	318-342	80℃
N45		1320-1380	≥11.6	≥923	≥12	≥955	43-46	342-366	80℃
N48		1380-1420	≥10.5	≥836	≥12	≥955	46-49	366-390	80℃
N50		1400-1450	≥10.0	≥796	≥11	≥876	48-51	382-406	80℃
N52		1430-1480	≥10.0	≥796	≥11	≥876	50-53	398-422	60℃
N54		1450-1510	≥10.0	≥796	≥11	≥876	50-53	398-422	60℃
33M		1130-1170	≥10.5	≥836	≥14	≥1114	31-33	247-263	100℃
35M		1170-1220	≥10.9	≥868	≥14	≥1114	33-36	263-287	100℃
38M		1220-1250	≥11.3	≥899	≥14	≥1114	36-39	287-310	100℃
40M		1250-1280	≥11.6	≥923	≥14	≥1114	38-41	302-326	100℃
42M		1280-1320	≥12.0	≥955	≥14	≥1114	40-43	318-342	100℃
45M		1320-1380	≥12.5	≥995	≥14	≥1114	43-46	342-366	100℃
48M		1360-1430	≥12.9	≥1027	≥14	≥1114	46-49	366-390	100℃
50M		1400-1450	≥13.0	≥1033	≥14	≥1114	48-51	382-406	100℃
35H		1170-1220	≥10.9	≥868	≥17	≥1353	33-36	263-287	120℃
38H		1220-1250	≥11.3	≥899	≥17	≥1353	36-39	287-310	120℃
40H		1250-1280	≥11.6	≥923	≥17	≥1353	38-41	302-326	120℃
42H		1280-1320	≥12.0	≥955	≥17	≥1353	40-43	318-342	120℃
45H		1320-1360	≥12.1	≥963	≥17	≥1353	43-46	342-366	120℃
48H		1370-1430	≥12.5	≥995	≥17	≥1353	46-49	366-390	120℃
35SH		1170-1220	≥11.0	≥876	≥20	≥1592	33-36	263-287	150℃
38SH		1220-1250	≥11.4	≥907	≥20	≥1592	36-39	287-310	150℃
40SH		1250-1280	≥11.8	≥939	≥20	≥1592	38-41	302-326	150℃
42SH		1280-1320	≥12.4	≥987	≥20	≥1592	40-43	318-342	150℃
45SH		1320-1380	≥12.6	≥1003	≥20	≥1592	43-46	342-366	150℃
28UH		1020-1080	≥9.6	≥764	≥25	≥1990	26-29	207-231	180℃
30UH		1080-1130	≥10.2	≥812	≥25	≥1990	28-31	223-247	180℃
33UH		1130-1170	≥10.7	≥852	≥25	≥1990	31-34	247-271	180℃
35UH		1180-1220	≥10.8	≥860	≥25	≥1990	33-36	263-287	180℃
38UH		1220-1250	≥11.0	≥876	≥25	≥1990	36-39	287-310	180℃
40UH		1250-1280	≥11.3	≥899	≥25	≥1990	38-41	302-326	180℃
28EH		1040-1090	≥9.8	≥780	≥30	≥2388	26-29	207-231	200℃
30EH		1080-1130	≥10.2	≥812	≥30	≥2388	28-31	223-247	200℃
33EH		1130-1170	≥10.5	≥836	≥30	≥2388	31-34	247-271	200℃
35EH		1170-1220	≥11.0	≥876	≥30	≥2388	33-36	263-287	200℃
38EH		1220-1250	≥11.3	≥899	≥30	≥2388	36-39	287-310	200℃
28AH		1040-1090	≥9.9	≥787	≥33	≥2642	26-29	207-231	230℃
30AH		1080-1130	≥10.3	≥819	≥33	≥2642	28-31	223-247	230℃
33AH		1130-1170	≥10.6	≥843	≥33	≥2642	31-34	247-271	230℃

Common Types of Sintered Strong Ndfeb Magnet by Shape

Strong Nd-Fe-B magnet material has good machinability, is suitable for different machining, and can be customized into various shape, the shape of disc, block/rectangle, ring, cylinder, tube, cube, arc/segment, countersunk, bar, sphere, and cone are the most common types for rare earth neodymium (NdFeB)strong magnets.

Common Types of Powerful Rare Earth Ndfeb Magnets by Surface Treatment

Nickel,Zinc and Epoxy coated powerful neodymium magnetsare the most widely used types;

Gold,silver,Teflon coated neodymium strong magnets also used for special application.

Rubber and plastic coated neodymium (NdFeB)strong magnets are used as waterproof and rust-resistant neodymium magnets.

Common Types of Sintered Neodymium Strong Magnets by Grade

N35,N38,N40,N42,N45,N48,N50 and N52 are commonly used neodymium strong magnets, N52 neodymium magnet has the highest magnetic energy product.

The rare earth neodymium magnets with grade of H,SH,UH,EH,AH are used for higher working temperature.

Common Surface Treatments of Sintered Custom Rare Earth Neodymium Magnets and Basic Description for Each Kind of Surface Treatment

Surface	Coating	Thickness (Microns)	Color	Resistance
Passivation		1	Silver Grey	Temporary Protection
Nickel	Ni+Ni	10-20	Bright Silver	Excellent Against Humidity
	Ni+Cu+Ni
Zinc	Zn	8-20	Bright Blue	Good Against Salt Spray
	C-Zn		Shinny Color	Excellent Against Salt Spray
Tin	Ni+Cu+Sn	15-20	Silver	Superior Against Humidity
Silver	Ni+Cu+Ag	10-20	Silver	Superior Against Humidity
Gold	Ni+Cu+Au	10-20	Gold	Superior Against Humidity
Copper	Ni+Cu	10-20	Gold	Temporary Protection
Epoxy	Epoxy	15-25	Black,Red,Grey	Excellent Against Humidity&Salt Spray
	Ni+Cu+Epoxy
	Zn+Epoxy
Parylene	Parylene	5-20	Grey	Excellent Against Humidity,Salt Spray,Superior Against Solvents,Gases, Fungi and Bacteria,FDA Approved
Chemical	Ni	10-20	Silver Grey	Excellent Against Humidity

Common surface treatment methods of sintered rare earth neodymium(NdFeB) strong magnets are as follows:

Phosphating can be adopted on neodymium strong magnets

Electroplating is the most commonly used surface treatment for strong neodymium magnets.

Electrophoresis is also a surface treatment way for powerful neodymium(NdFeB) magnets

Electroless(chemical)plating is used when there are particularly high requirements for corrosion protection.

Organic spraying is adopted when there are different color demands for strong neodymium magnets.

Physical Properties of Sintered Neodymium(NdFeB) Magnet Material

Parameter	International Unit	Standard Data
Curie Temperature(Tc)	℃	310-380
Maximum Operating Temperature(Tw)	℃	80-230
Hardness	Hv	620
Electrical Resistivity (ᵨ)	Ω.cm
Density(D)	g/m³
Recoil Permeability(µ rec)
Magnetization Field Strength(Hs)	kA/m	≧2400
	kOe	≧30
Bending Strength	Mpa	295-345
	％℃	-0.11~-0.12
	％℃	-0.5~-0.7

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