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Rainbow Magnet Ltd.
Rainbow Magnet Ltd.  

Gold Index: 16481

You are here: home  > Ndfeb Magnet  > Neodymium Ring Magnets  > NdFeB ring magnets. permanent rare earth material magnet.

NdFeB ring magnets. permanent rare earth material magnet. 

Price: 0.1~60.0 USD 
Payment Terms: T/T,L/C,WU 
Place of Origin: Zhejiang, China (Mainland) 
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Product Detail

Model No.: RM-R13
Production Capacity: 100ton/month
Delivery Date: 4 weeks
Type: Permanent
Brand Name: rainbow magnet
Grade: N/M/H/SH/UH/EH
Means of Transport: Ocean,Land,Air
Packing: standard carton by sea or b...
Application: Speaker Magnet
Composite: Neodymium Magnet
Shape: ring

high quality
various size
Zn coating
grade from N35 to N52.N35M to N50M,N35H to N48H,N35SH to N45SH,N30UH to N40UH,N30EH to N38EH.


The EH grade of NdFeB magnet and its details properties, pls see follow table.
Grade
Residual Induction
Coercive Force
Intrinsic Coercive Force
Maximum Energy Product
Maximum Operating
Temperature
Br
Hcb
Hcj
(BH)max
Tw
T
KGS
KA/m
KOe
KA/m
KOe
KJ/m3
MGOe
N28EH
1.04-1.08
10.4-10.8
780-812
9.8-10.2
≥2388
≥30
207-223
26-28
≤200
N30EH
1.08-1.12
10.8-11.2
804-844
10.1-10.6
≥2388
≥30
223-239
28-30
≤200
N33EH
1.14-1.17
11.4-11.7
820-876
10.3-11.0
≥2388
≥30
247-263
31-33
≤200
N35EH
1.17-1.21
11.7-12.1
860-907
10.8-11.4
≥2388
≥30
263-279
33-35
≤200
N38EH
1.22-1.26
12.2-12.6
860-907
10.8-11.4
≥2388
≥30
287-303
36-38
≤200
Note: The above mentioned data of magnetic parameters andphysical are given at 20℃±2℃

According the max working temperature, we can divide Sinteredmagnet to 7 grades, N grade is for 80 ℃,grade M is for 100℃,grade H isfor 120℃,grade SH is for 120℃,grade UH is for 150℃ and grade EH is for 200℃,youaccording your demand to choose the grade which you need.

Mostly of rare earth permanent magnet always work do notat room temperature or under vacuum, in order to keep the accuracy of shape sizeand avoid the Corrosion and oxidation, we must make the coating on thesurface.
Sometime, the customers have high demand of NdFeB anti-corrosion,antioxidant, we can design the magnet,add some elements, such as: niobium,vanadium, cobalt and other metal to replace part of the iron to catch thecustomer requirements of the acid and alkali resistant,antioxidant level,however, because of special material, we needMOQ for it.
How to judge the Permanent magnet material propertiesadvantages and disadvantages of standard?
You can see 3 terms:
1) the magnet -crystalline anisotropy,
2) the Curie temperature.
3) the magnetization strong

The main physical properties of sintered round permanentmagnet:
magnetic properties
Parameters
Density /g.cm3
VickersHardness HV
Resistivity /υΩ.cm
Compressivestrength/N.mm-2
Coefficient of ThermalExpansion (C⊥)/K-1
Coefficient of ThermalExpansion (C∥) /K-1
7.45
570
150
780
-4.8X10-6
-3.4X10-6

the magnetic properties of rare earth magnet:
compare NdFeB and SmCo
item
Js/T
(BH)m
/KJ.m-3
HA
/MA.m-1
Tc/℃
RE/TM
TM
Nd2Fe14B
1.61
528
6
310
0.117
Fe
SmCo5
1.15
248
32
740
0.166
Co
Sm2Co17
1.56
480
8
890
0.105
Co

pic show the NdFeB ring magnet with Zn coating.

bigPhoto
 Ms. Annie

Tel: 86-574-87840198
Fax: 86-574-87393806
Mobile: 86- 189 5744 9606
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Company Info

Rainbow Magnet Ltd. [China (Mainland)]


Business Type:Manufacturer
City: Ningbo
Province/State: Zhejiang
Country/Region: China (Mainland)

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