neodymium(NdFeB) magnets, samarium cobalt(SmCo5, Sm2Co17)magnets, Alnico magnets, permanent rare earth magnets.
NCMag™ supplier of neodymium(N54N52N50N48) magnets; manufacturer of super strong magnet(N35N38N45N48)magnets in china.

what's NdFeB N52N50N55 magnets? where's neodymium N54N48N45 magnets manufacturers? how to buy N35N38N40 neodymium iron boron?

what's grades of neodymium magnets?

The Neodymium magnets have a simple nomenclature. They all start with "N" which simply stands for "Neo" and is followed by a two digit number.

the current range of neodymium iron boron

N27, N30, N33, N35, N38, N40, N42, N45, N48, N50, N52, N30M, N33M, N35M, N38M, N40M, N42M, N45M, N48M, N50M, N30H, N33H, N35H, N38H, N40H, N42H, N45H, N48H, N30SH, N33SH, N35SH, N38SH, N40SH, N42SH, N45SH, N28UH, N30UH, N33UH, N35UH, N38UH, N40UH, N28EH, N30EH, N33EH, N35EH, N38EH, N33VH/AH.

This number represents the maximum energy product in Mega-Gauss Oersteds (MGOe) where 1MGOe equals 7958kJ/m3 . The range available used to be N24 up to N52. The lower grades are no longer made and the range now starts at around N30 or N33. N50 is the highest readily available grade. N52 is possible but only in certain sizes. Although the maximum possible energy product is calculated in to be N64, it is unlikely such high strengths of Neodymium will be achievable in the near future. A suffix letter may then follow the number. It is stated that these letters relate to a temperature rating. Strictly speaking this is not correct. The letters actually indicate the Intrinsic Coercivity (Hci) of the material. The higher the Hci, the higher the temperature the Neodymium magnet material can be exposed to before the magnet will start to show permanent losses in output. It is this fact that is used to link the last letter to a temperature rating.

However, the temperature rating for Neodymium is merely a guide value. It is the physical size and shape of the NdFeB magnet and the total magnetic circuit that actually determines how well a magnet will perform at raised temperature. For example a NdFeB magnet in free space will demagnetise at a lower temperature than the same sized NdFeB magnet connected to a piece of mild steel. It will also demagnetise at a lower temperature than a NdFeB magnet of twice the length in the direction of magnetisation. The Intrinsic curve shape also plays a part in the temperature performance of NdFeB.

"N" grades of sintered neodymium iron boron magnets

China NdFeB neodymium iron boron magnets
NdFeB Br HcB HcJ BHmax Tc
Grade KGs T KOe kA/m kOe kA/m mGOe kJ/m3 °C
N35 11.7-12.1 1.17-1.21 ≥10.9 ≥868 ≥12 ≥955 33-36 263-287 80
N38 12.1-12.5 1.21-1.25 ≥11.3 ≥899 ≥12 ≥955 36-39 287-310 80
N40 12.5-12.8 1.25-1.28 ≥11.6 ≥923 ≥12 ≥955 38-41 302-326 80
N42 12.8-13.2 1.28-1.32 ≥11.6 ≥923 ≥12 ≥955 40-43 318-342 80
N45 13.2-13.8 1.32-1.38 ≥11.0 ≥876 ≥12 ≥955 43-46 332-366 80
N48 13.8-14.2 1.38-1.42 ≥10.5 ≥ 835 ≥12 ≥876 46-49 366-396 80
N50 13.8-14.5 1.38-1.45 ≥10.5 ≥835 ≥12 ≥876 47-51 374-406 80
N52 14.4-14.8 1.44-1.48 ≥10.5 ≥836 ≥11 ≥876 49-53 390-422 80
total 8 neodymium iron boron magnets, NdFeB magnets,NEO magnets. NIB magnets.

magnetism unit conversion of neodymium iron boron magnets

China NdFeB neodymium iron boron magnets
from cgs to SI from SI to cgs
1Oe = 7.962 x 10 A/m 1 A/m = 1.256 x 10-2Oe
1G = 1 x 10-4 T 1 T = 1 x 10 4G
1 Gb = 0.796 At 1 At = 1 .265 Gb
1 maxwell = 1 x 10 -8 1 Wb = 1 x 108 maxwell
1 G Oe = 7.962 x 10 -3 J/m3 1 J/m3 = 1.256 x 102 G Oe
total 5 neodymium iron boron magnets, NdFeB magnets,NEO magnets. NIB magnets.
The total magnetic circuit that the Neodymium magnet is in determines its working point on the Intrinsic curve. By having a higher working point he magnet will cope with a higher temperature before it will show signs of demagnetisation. The situation is made more unclear if an external demagnetising field is present as this may mean the Neodymium magnet may demagnetise at even lower temperatures.

Therefore, it is quickly apparent that the total magnetic circuit, the total environment and the application as a whole must all be reviewed to determine whether a Neodymium magnet will still perform at a satisfactory level towards the recommended maximum working temperature as indicated by the letter in its NdFeB grade classification. For example, a magnet rated for a recommended maximum working temperature of 150 degrees C may start to demagnetise significantly at 100 degrees C is the design is poor or a magnet rated for a recommended maximum working temperature of 80 degrees C may start to demagnetise significantly at 100 degrees C is the design is really good.

NdFeB magnets are approximately 10x stronger than their ceramic counterparts. This means you will be able to use a much smaller NIB magnet in place of a ceramic magnet and the holding force will be at least equal! Simply Amazing.

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