Neodymium Magnet

1) high quality NdFeb materials, 2) customized size & accurate tolerance, 3) fast and safe delivery & excellent service - details see: //
Place of Origin: Zhejiang China (Mainland)Brand Name: SkymagType: PermanentComposite: Rare Earth Magnet
Shape: BlockApplication: Industrial MagnetGrade:: N35-N52Coating:: Nickel, Black nickel, Zn, Gold, Silver, Copper, Epoxy,
Neodymium Magnet
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Properties of Selected Magnetics Materials
This chart presents some of the magnetic properties of a subset of magnetic materials:



Product Bhmax(MGOe)





Force Hc(Koe)




Ceramic 53.439502400400
Sintered Alnico53.910900620540
Cast Alnico 85.382001650540
Samarium Cobalt 20(1.5)2090008000260
Samarium Cobalt

28 (2,17)

Neodymium N4545135001080080
Neodymium 33UH331150010700180


Neodymium magnets attract each other with almost twice the force that they use to attract

steel objects.They also attract each other through very large distances, even small

magnetswill attract each other through the thickness of your finger!

About NdFeB magnet:

Neodymium iron boron ( NdFeB) is a type of rare earth magnetic material.
NdFeB is the most advanced commercialized permanent magnet material available today.

This material has similar properties as the samarium cobalt except that it is more easily oxidized

and generally doesn't have the same temperature resistance.
However, NdFeB magnets have the highest energy products approaching 52MGOe and are

mechanically stronger than samarium cobalt magents. NdFeB material is more costly by weight than

ceramic or alnico but produces the highest amount of flux per unit of volume or mass amking it very economical for many applicantions. Their high energy products lend themselves to comnpact designs

that result in innovative applications and lower manufacturing costs.
Unprotected NdFeB magnets are subject to corronsion. Surface treatments has ben developed that

allow them to be used in most applications. These treatments include copper, silver,, gold, nickel,

zinc and tin plating and epoxy resin coating.
Beneficial characteristics of NdFeB magnets include their very high energy product, very high

coercive force, and moderate temperature stability. Drawbacks include lower mechanical strength,

and low corrosion resistance when not properly coated or plated.

Magnetic Grades and Temperature:

The Grade of a magent directly refers to the Maximum Energy Product of the material that composes the magnet. It in no way refers to the physical properties of the magnet. Grade is generally used to describe

how "strong" a permanent magnet material is. The energy products is specified in the unites Gauss Oersted.

One MGOe is 1,000,000 Gauss Obersted. A grade forty (N40) would have a Maximum Energy Product of 40 MGOe.The higher the grade the "stronger" the magnet.

Magnetic materials have a wide range of working temperatures. The following chart the various materials and their maximum working temperature. NdFeB material
comes in many different heat tolerances but as the heat tolerance increases the maximum available fulx density decreases:



Material:NdFeB magnet

Woking Temperature

GradeMax.Operating Temperature

Passivation1silver greyTemporary Protection
NickelNi+Ni10-20bright silverexcellent against humidity
ZincZn8-20bright bluegood against salt spray
C-Znshinny colorexcellent against salt spray
TinNi+Cu+SN15-20silverSuperior Against Humidity
GoldNi+Cu+AU10-20goldsuperior against humidity
CopperNi+Cu10-20goldTemporary protection
Epoxyepoxy15-25black, red, greyexcellent against humidity and salt spray
ChemicalNi10-20Silver greyexcellent against humidity
Paryleneparylene5-20greyexcellent against humidity, salt spray, superior against solvents, gases, fungi and bacteria

Magnetic Orientations
Magnets can be delivered magnnetized and un-magnetized. Many automated production methods rely on the magnets being incorporated into assemblies in a un-magnetized state and later magnetized once the assembly is completed.
A magnet can be magnetized in a variety of directions. The diagrams below depict various magnetic orientations available for magnets. Anisotropic materials must be magnetically oriented during the production of material. They therefore are inclined to a fixed orientation.
The radial orientations below are difficlut to produce and currently only available in some isotropic materials.

Magnets are prevasive in the moden environment. From the humblue refrigerator magnet to the Hubble space Telescope, magnets impact almost every aspect of our lives. Magnets are part of most everyday electronic devices. You'll find magnets in almost every device with an electronic motor. Televisions, computers, autombiles, loud speakers, cell phones, and microwave ovens, all use magnets. Magnets are used to keep kitchen cabinet doors closed, are part of the sensors in home alarm systems, are palced in cows stomachs to catch barbed wire and nails, are used in magnetic resonance imaging systems, are used to slow elevators, roller coasters and subways, and in ountless other devices. Because of the broad used of magents it is difficlut to provide a definitive list of all other applications. However, the bulk of magnets manufactured today are used primarily in holding applications and electro-motive applications.

Contact us:

Please do no hesitate to contact with us if you have any questions or requests on magnet.
You can inquiry either by email/fax or instant message
We are pleased to offer your service and respond within 12 hours

Sales manager: Mr. Majo
Skype: infoskymagnet

Tel:+86 574 88229326

Relevant Shipping Advantage:
1) Appointed forwarder is welcome
2) We can ship by express, air & sea
3) We have big discount on our won forwarder, and mainly world-wide express such as : DHL, UPS, Fedex

Packaging Detail:standart export cartons with inner white boxes
Delivery Detail:within 15 days

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