Neodymium magnets

What is Neodymium magnet?

The Neodymium magnet (also known as the NdFeb magnet) is made from the alloy between Neodymium and pure iron. With a capacity of 57 MGOe, this is the most powerful permanent magnet ever. Plus it’s light weight so it’s pretty widely used.

Characteristics

  • Energy product above 50 MGOe possible
  • Very powerful magnets
  • Lower resistance to corrosion
  • Application: in automotive, sensors, speakers, scanners

Disc Neodymium Magnets

Also known as disc magnets, usually less than or equal to the thickness, this is a common magnet because it is easy to apply. The N and S poles are located on both sides of the magnet. This is also considered NdFeb magnets cheaper than other shapes.

nam cham neodymium hinh tron

Disc Neodymium magnets

nam cham neodymium hinh tron

N and S

 

Ring Neodymium magnets

The shape is similar to the rounded NdFeb magnet but has a hole (large or small depending on requirements) at the center to meet the demand for production.

 

nam cham neodymium hinh tron

Disc Neodymium magnets

nam cham neodymium hinh tron

Disc Neodymium magnets

Block Neodymium magnets

There are two types of rectangular blocks or cubes. This is the sample that is diverse in terms of type and size. Accordingly, the magnetic direction and magnetic force are also different.

 

nam cham neodymium hinh khoi

Square block Neodymium magnets

 

nam cham neodymium hinh tron

Rectangular block Neodymium magnets

Arc Neodymium magnets

This is considered to be the most distinctive form of NdFeb, requiring magnetic force guidance to be more carefully calculated.
nam cham neodymium hinh cung

Arc Neodymium magnets

nam cham neodymium hinh cung

Arc Neodymium magnets

Standard Sepcifications for NdFeb Magnet

Properties Remanence Br Coercive force Hcb Intrinsic coercive force Hcj Max.Energy product (BH)max

Temp. coefficient (200C-TW)

Density D Curie Temp. TC Max Working Temp. 
No Grade Unit kGs T kOe kA/m kOe kA/m MGOe Kj/m3 α Br  α Hcj
 -%0C  -%0C  g/cm  0C  0C
 1 N35 11.7-12.1 1.17-1.21 >=868 >=10.9 >=12 >=955 33-36 263-287  0.12 0.6 >=7.4 310 80
2 N38 12.1-12.5   1.21-1.25 >=899   >=11.3  >=12 >=955 36-38 287-303 0.12 0.6 >=7.4 310 80
3  N40 12.5-12.8 1.25-1.28   >=923 >=11.6 >=12 >=955 38-41 303-326 0.12 0.6 >=7.4 310 80
4 N42 12.8-13.2 1.28-1.32 >=923 >=11.6 >=12 >=955 41-43 326-342 0.12 0.6 >=7.4 310  80
5  N45 13.2-13.8 1.32-1.38 >=876 >=11.0 >=12 >=955 43-46 342-366 0.12 0.6 >=7.4 310 80
6  N48 13.8-14.2 1.38-1.42 >=876 >=11.0 >=12 >=955 46-49 366-390 0.12 0.3 >=7.4 310 80
7  N50 13.9-14.6 1.39-1.46 >=836 >=10.5 >=12 >=955 47-51 374-406 0.12 0.6 >=7.4 310 80
8  N52 14.2-14.7 1.42-14.7 >=836 >=10.5 >=12 >=955 49-53 399-422 0.12 0.6 >=7.4 310 80
9  35M 11.7-12.1 1.17-1.21 >=868 >=10.9 >=15 >=1194 33-36 263-287 0.11 0.6 >=7.4 320 100
10  38M 12.1-12.5 1.21-1.25 >=899 >=11.3 >=15 >=1194 36-38 287-303 0.11 0.6 >=7.4 320 100
11 40M 12.5-12.8 1.25-1.28 >=923 >=11.6 >=15 >=1194 38-41 303-326 0.11 0.6 >=7.4 320 100
12 42M 12.8-13.2 1.28-1.32 >=955 >=12.0 >=15 >=1194 41-43 326-342 0.11 0.6 >=7.4 320 100
13 45M 13.2-13.8 1.32-1.38 >=955 >=12.0 >=15 >=1194 43-46 342-366 0.11 0.6 >=7.4 320 100
14 48M 13.8-14.2 1.38-14.2 >=955 >=12.0 >=15 >=1194 46-49 366-390 0.11 0.6 >=7.4 320 100
15  35H 11.7-12.1 1.17-1.21 >=868 >=10.9 >=17 >=1353 33-36 263-287 0.11 0.6 >=7.4 320-340 120
16  38H 12.1-12.5 1.21-1.25 >=899 >=11.30 >=17 >=1353 36-38 287-303 0.11 0.6 >=7.4 320-340 120
17  40H 12.5-12.8 1.25-1.28 >=923 >=11.6 >=17 >=1353 38-41 303-326 0.11 0.6 >=7.4 320-340 120
18  42H 12.8-13.2 1.28-1.32 >=955 >=12.00 >=17 >=1353 41-43 326-342 0.11 0.6 >=7.4 320-340 120
19   45H 13.2-13.8 1.32-1.38 >=955 >=12.00 >=17 >=1353 43-46 342-366 0.11 0.6 >=7.4 320-340 120
20  48H 13.8-14.2 1.38-14.2 >=955 >=12.00 >=17 >=1353 46-49 366-390 0.11 0.6 >=7.4 320-340 120
21  33SH 11.3-11.7 1.13-1.17 >=835 >=10.50 >=20 >=1592 31-33 247-263 0.10 0.6 >=7.4 340-400 150
22  35SH 11.7-12.1 1.17-1.21 >=868 >=10.9 >=20 >=1592 33-36 263-287 0.10 0.6 >=7.4 340-400 150
23  38SH 12.1-12.5 1.21-1.25 >=899 >=11.30 >=20 >=1592 36-38 287-303 0.10 0.6 >=7.4 340-400 150
24  40SH 12.5-12.8 1.25-1.28 >=923 >=11.6 >=20 >=1592 38-41 303-326 0.10 0.6 >=7.4 340-400 150
25  42SH 12.8-13.2 1.28-1.32 >=955 >=12.00 >=20 >=1592 41-43 326-342 0.10 0.6 >=7.4 340-400 150
26  30UH 10.8-11.3 1.08-1.13 >=812 >=10.20 >=25 >=1990 28-31 223-247 0.10 0.6 >=7.4 340-400  180
27  33UH- 11.3-11.7 1.13-1.17 >=835 >=10.50 >=25 >=1990 31-33 247-263 0.10 0.6 >=7.4 340-400 180
28  35UH 11.7-12.1 1.17-1.21 >=868 >=10.90 >=25 >=1990 33-36 263-287 0.10 0.6 >=7.4 340-400 180
29  38UH 12.1-12.5 1.21-1.25 >=899 >=11.30 >=25 >=1990 36-39 287-303 0.10 0.6 >=7.4 340-400 180
30   30EH 10.8-11.3 1.08-11.3 >=812 >=10.20 >=30 >=2387 28-31 223-247 0.10 0.6 >=7.4 340-400 200
31  33EH 11.3-11.7 1.13-1.17 >=835 >=10.50 >=30 >=2387 31-33 247-263 0.10 0.6 >=7.4 340-400 200
32  35EH 11.7-12.1 1.17-1.21 >=868 >=10.90 >=30 >=2387 33-36 263-287 0.10 0.6 >=7.4 340-400 200


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