neodymium(NdFeB) magnets, samarium cobalt(SmCo5, Sm2Co17)magnets, Alnico magnets, permanent rare earth magnets.
NCMag™ supplier of rare earth neodymium SmCo Neo(cubes,block,cylinder) magnets; manufacturer of NIB, AlNiCo SmCo(arc, disc, ring) magnets in china.

what's neodymium magnet? where's NdFeB, SmCo,AlNiCo magnets manufacturers? how to buy NIB(arc, disc, ring), SmCo(block,cylinder), AlNiCo?

we are manufacturer neodymium magnet segments, AlNiCo4 N52, SmCo block magnets, SmCo5 permanent AlNiCo2 magnets, NdFeB ring magnets,N50, AlNiCo6 strong NIB cylinder magnets, AlNiCo8 N54, rare earth arc magnets,N48, Neocubes, samarium cobalt disks,Sm2Co17 neodymium iron boron plates, super powder bars, powerful rod magnets.

what's neodymium magnets?

Often referred to as neo magnet, NIB or NdFEB, neodymium rare earth magnets are permanent magnets composed of an alloy of neodymium, boron and iron. Of late, this magnet holds the title for being the strongest type of permanent magnet. It also has a metallic appearance.

types of neodymium(NdFEB, SmCo, Alnico) magnets

neodymium magnets, SmCo magnets, Alnico magnets
magnets Br(T) Hci(kA/m) (BH)max(kJ/m3) Tc(C)
Nd2Fe14B(sintered) 1.0C1.4 750C2000 200C440 310C400
Nd2Fe14B(bonded) 0.6C0.7 600C1200 60C100 310C400
SmCo5(sintered) 0.8C1.1 600C2000 120C200 720
Sm(Co,Fe,Cu,Zr)7(sintered) 0.9C1.15 450C1300 150C240 800
Alnico (sintered) 0.6C1.4 275 10C88 700C860
Sr-ferrite (sintered) 0.2C0.4 100C300 10C40 450
Total 6 NdFeB magnets, samarium cobalt magnets, Alnico magnets

grades and temperature of neodymium magnets

neodymium iron boron NdFeB, NIB NEO magnets
No. Curie(Tc) working(Tc) Grades
1 310°C 80°C N-( N30,N33,N35, N38, N40, N42, N45, N48, N50,N52,N55)
2 340°C 100°C M-(N33M,N35M, N38M, N40M,N42M, N45M, N48M,N50M)
3 340°C 120°C H-(N33H,N35H, N38H, N40H, N42H, N44H,N46H,N48H)
4 340°C 150°C SH-(N30SH, N33SH, N35SH, N38SH, N40SH, N42SH,N45SH)
5 340°C 180°C UH-(N30UH, N33UH, N35UH, N38UH,N40UH)
6 350°C 200°C EH-(N28EH, N30EH, N33EH, N35EH,N38EH)
7 350°C 220°C AH-(N28AH, N30AH, N33AH)
total 7 neodymium iron boron magnets NdFeB magnets, NIB magnets, NEO magnets

what's SmCo magnets?

Permanent Samarium Cobalt magnets (SmCo) are composed of samarium, cobalt and iron. These rare earth magnets are extremely strong for their small size, metallic in appearance and found in simple shapes such as rings, blocks and discs.

According to standards, visual imperfections such as hairline cracks, porosity and minor chips are commonly found in sintered metallic magnets. A chipped edge is considered acceptable if no more than 10% of the surface is missing. Cracks are acceptable as long as they do not extend across more than 50% of pole surfac.

Most of customers request NdFeB magnet with high maximum working temperature, such as 38SH, 35EH, 35UH, use some small arc magnets to form a ring magnet, magnetization direction is through diameter, N-S and S-N. And some request other shapes such as segment, wedge shape, block, ring, or special shape.

tolerance of neodymium(NdFEB, SmCo, Alnico) magnets

neodymium(NdFEB, SmCo, Alnico) magnets
types Parameter Maximum Minimum Thickness (mm)
Ring Magnet Outer Diameter(mm) 160 140 50
Inner Diameter (mm) 2.6 1.8 0.5
Tolerance ±0.1 ±0.1 ±0.1
Block Magnet Length (mm) 150 50 30
Width (mm) 2.0 1.5 1.5
Tolerance ±0.1 ±0.1 ±0.1
Segments Outer arc(mm) 160 140 20
Inner arc(mm) 150 30 3
Tolerance ±0.1 ±0.1 ±0.1
Disc Magnet Diameter (mm) 200 1.2 35-0.5
Tolerance ±0.1 ±0.1 ±0.1
Total 4 neodymium (NdFEB) magnets, SmCo(SmCo1:5, SmCo2:17), Alnico magnets

Alnico magnets are manufactured by a cast or sintered process. Production level cast Alnico magnets are produced by conventional foundry methods using resin bonded sand molds. The magnetic characteristics for some exotic grades of Alnico magnets are achieved during the casting operation and are due to the unique crystalline grain orientation developed during the process.

Sintered Alnico is a powdered metal and it is manufactured by compacting finely milled Alnico powder in a metallic mold. The resulting geometry is not fully dense and it must be sintered in a furnace to achieve a solid state.

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