Rare Earth Magnet

Rare Earth Magnet
Neodymium Iron Boron (NdFeB) and Samarium Cobalt (SmCo) are called Rare Earth because Neodymium and Samarium are found in the rare earth elements on the periodic table. Both Neodymium and Samarium Cobalt alloys are powdered metals which are compacted in the presence of a magnetic field and are then sintered.
Neodymium (Rare Earth)
Neodymium, or Neo, is made up of Neodymium Iron and Boron and is moderate in price. With poor corrosion resistance this alloy is usually plated or coated (Examples: Nickel Plated, Epoxy Coated, Parylene Coated). Neodymium is offered in a range of operating temperatures depending on your application (80•C to 200•C). Premium Neodymium Alloys capable of operating above 120•C can become quite expensive. This permanent magnet material has many intellectual property rights associated with it and there are a limited number of licensed manufacturers in the world. Many infringing manufacturers from the Pacific-rim dump sub par material into the Western markets. This magnet material is extremely powerful and it has allowed for the miniaturization of many products from HDD (Hard Disc Drives) and motors to novelties and audio devices. Neodymium permanent magnets usually offer the best value when comparing price and performance.
Samarium Cobalt (Rare Earth)
Samarium Cobalt is made up of largely Samarium and Cobalt and it is the most expensive magnet material to manufacture and to fabricate. Most of the cost is due to the high Cobalt content and the brittle nature of the alloy. This permanent magnet material offers high resistance to corrosion and it can withstand high operating temperatures, up to 350•C. This material is used extensively in the aerospace market or in areas of industry where performance is the priority concern and cost is secondary. Samarium Cobalt is the second most powerful magnet material and it exhibits excellent resistance to demagnetizationv


Rare Earth Magnet-01

Performance
Materials
NO     Materials
Remanence
Br
Coercive Force Hcb Intrinsic Coercive force Hci Max Energy Product
(Bh)max
Square
Degress
Hk/Hcj
Highest Work temperature
KG T KOe KA/m KOe KA/m MGOe KJ/m Block Cylinder •C
1 N-35 11.4-11.8 1.18-1.28 >=10.8 >=836 >=12 >=955 33-36 263-287 >=90% >=86.8% 80
2 N-38 11.8-12.3 1.18-1.28 >=10.8 >=860 >=12 >=955 36-39 287-310 >=90% >=86.8% 80
3 N-40 12.7-12.9 1.27-1.29 >=11.0 >=876 >=12 >=955
  1. 38-41
303-326 >=90% >=86.8% 80
4 N-42 12.9-13.3 1.29-1.33 >=10.5 >=836 >=12 >=955 40-43 318-342 >=90% >=86.8% 80
5 N-45 13.3-13.8 1.33-1.38 >=9.5 >=756 >=12 >=955 43-46 342-366 >=90% >=86.8% 80
6 N-48 13.8-14.2 1.38-1.42 >=10.5 >=835 >=12 >=955 46-49 366-390 >=90% >=86.8% 80
7 N-50 13.8-14.5 1.37-1.45 >=10.5 >=835 >=11 >=955 47-51 374-406 >=90% >=86.8% 80
8 N-52 14.3-14.8 1.43-1.48 >=10.8 >=860 >=11 >=876 50-13 395-422 >=90% >=86.8% 80
9 33M 11.4-11.8 1.14-1.18 >=10.3 >=820 >=14 >=1114 31-33 247-263 >=90% >=86.8% 100
10 35M 11.8-12.3 1.18-1.23 >=10.8 >=860 >=14 >=1114 33-36 263-287 >=90% >=86.8% 100
11 38M 12.3-12.7 1.23-1.27 >=11.0 >=876 >=14 >=1114 38-41 303-326 >=90% >=86.8% 100
12 40M 12.7-12.9 1.27-1.29 >=11.4 >=907 >=14 >=1114 38-41 303-326 >=90% >=86.8% 100
13 42M 12.8-13.2 1.28-1.32 >=11.6 >=923 >=14 >=1114 40-43 318-342 >=90% >=86.8% 100
14 45M 13.2-13.8 1.32-1.38 >=11.8 >=939 >=14 >=1114 43-46 342-366 >=90% >=86.8% 100
15 48M 13.6-14.0 1.36-1.40 >=11.8 >=939 >=14 >=1114 46-49 366-390 >=90% >=86.8% 100
16 50M 14.0-14.5 1.40-1.45 >=13.0 >=1033 >=17 >=1114 48-51 382-406 >=90% >=86.8% 100
17 30H 10.8-11.4 1.08-1.14 >=10.2 >=812 >=17 >=1353 28-31 223-247 >=90% >=86.8% 120
18 33H 11.4-11.8 1.14-1.18 >=10.6 >=844 >=17 >=1353 31-33 247-263 >=90% >=86.8% 120
19 35H 11.8-123 1.18-1.28 >=11.0 >=876 >=17 >=1353 33-36 263-287 >=90% >=86.8% 120
20 38H 12.3-12.7 1.23-1.27 >=11.2 >=890 >=17 >=1353 36-39 287-310 >=90% >=86.8% 120
21 40H 12.7-12.9 1.27-1.29 >=11.5 >=915 >=17 >=1353 38-41 303-326 >=90% >=86.8% 120
22 42H 12.8-13.2 1.28-1.32 >=12.0 >=955 >=17 >=1353 40-43 318-342 >=90% >=86.8% 120
23 45H 13.2-13.5 1.32-1.38 >=12.0 >=955 >=17 >=1353 42-46 335-366 >=90% >=86.8% 120
24 46H 13.3-13.8 1.33-13.8 >=12.2 >=972 >=16 >=1274 44-47 350-374 >=90% >=86.8% 120

Performance
Materials
NO     Materials
Remanence
Br
Coercive Force Hcb Intrinsic Coercive force Hci Max Energy Product
(Bh)max
Square
Degress
Hk/Hcj
Highest Work temperature
KG T KOe KA/m KOe KA/m MGOe KJ/m Block Cylinder •C
25 48H 113.6-14.3 1.36-1.42 >=12.5 >=996 >=16 >=1274 46-49 366-390 >=90% >=86.8% 120
26 30SH 10.8-11.4 1.08-1.14 >=10.0 >=796 >=20 >=1672 28-31 223-247 >=90% >=86.8% 150
27 33SH 11.4-11.8 1.14-1.18 >=10.5 >=836 >=20 >=1672
  1. 31-34
247-276 >=90% >=86.8% 150
28 35SH 11.8-12.3 1.18-1.23 >=11.0 >=876 >=20 >=1672 33-36 263-287 >=90% >=86.8% 150
29 38SH 12.3-12.7 1.23-1.27 >=11.4 >=907 >=20 >=1972 36-39 287-310 >=90% >=86.8% 150
30 40SH 12.5-12.8 1.25-1.28 >=11.8 >=939 >=20 >=1972 39-41 302--326 >=90% >=86.8% 150
31 42SH 12.8-13.2 1.28-1.32 >=11.8 >=939 >=20 >=1672 40-43 320-343 >=90% >=86.8% 150
32 45SH 13.2-13.8 1.32-1.38 >=12.6 >=1003 >=20 >=1592 43-46 342-366 >=90% >=86.8% 150
33 30UH 10.8-11.4 1.08-1.14 >=10.2 >=812 >=25 >=1990 28-31 223-247 >=90% >=86.8% 180
34 33UH 11.3-11.7 1.13-1.17 >=10.7 >=852 >=25 >=1990 31-33 247-263 >=90% >=86.8% 180
35 35UH 11.7-12.1 1.17-1.21 >=10.7 >=852 >=25 >=1990 33-36 263-287 >=90% >=86.8% 180
36 38UH 12.1-12.5 1.21-1.25 >=11.4 >=907 >=25 >=1990 36-39 287-310 >=90% >=86.8% 180
37 40UH 12.5-12.8 1.25-1.28 >=11.4 >=907 >=30 >=1990 38-41 302-326 >=90% >=86.8% 180
38 28EH 10.5-10.8 1.05-1.08 >=9.5 >=756 >=30 >=2388 26-29 207-231 >=90% >=86.8% 200
39 30EH 10.8-11.4 1.08-1.14 >=9.5 >=756 >=30 >=2388 28-31 223-241 >=90% >=86.8% 200
40 33EH 11.3-11.7 1.13-1.17 >=10.2 >=812 >=30 >=2388 31-33 247-263 >=90% >=86.8% 200
41 35EH 11.7-12.1 1.17-1.21 >=10.2 >=812 >=30 >=2388 33-36 263-287 >=90% >=86.8% 200
42 38E 12.1-12.5 1.21-1.25 >=11.4 >=907 >=30 >=2388 36-39 287-310 >=90% >=86.8% 200
43 30AH 10.8-11.3 1.08-1.13 >=10.2 >=812 >=35 >=2785 28-32 223-255 >=90% >=86.8% 220
44 33AH 11.2-11.7 1.12-1.17 >=10.2 >=812 >=35 >=2785 31-34 247-271 >=90% >=86.8% 220

Note: 1. The above-mentioned data of magnetic
parameters and physical properties
are given at room temperature.
2. The maximun service temperature of magnet is
changeable due to the ratio
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