Everything else / Bulk
Rare Earth Neodymium Magnets |
Magnet |
Remanence (Br) |
HcB |
HcJ |
(B-H)max |
Max.Temp. |
||||
Type(Grade) |
(KGs) |
(mT) |
(Koe) |
(KA/m) |
(Koe) |
(KA/m) |
(MGOe) |
(KJ/m3) |
℃ |
N35 |
11.7-12.2 |
1170-1220 |
≥10.9 |
≥868 |
≥12 |
≥955 |
33-36 |
263-287 |
80℃ |
N38 |
12.2-12.5 |
1220-1250 |
≥11.3 |
≥899 |
≥12 |
≥955 |
36-39 |
287-310 |
80℃ |
N40 |
12.5-12.8 |
1250-1280 |
≥11.4 |
≥907 |
≥12 |
≥955 |
38-41 |
302-326 |
80℃ |
N42 |
12.8-13.2 |
1280-1320 |
≥11.5 |
≥915 |
≥12 |
≥955 |
40-43 |
318-342 |
80℃ |
N45 |
13.2-13.8 |
1320-1380 |
≥11.6 |
≥923 |
≥12 |
≥955 |
43-46 |
342-366 |
80℃ |
N48 |
13.8-14.2 |
1380-1420 |
≥10.5 |
≥836 |
≥12 |
≥955 |
46-49 |
366-390 |
80℃ |
N50 |
14.0-14.5 |
1400-1450 |
≥10.0 |
≥796 |
≥11 |
≥876 |
48-51 |
382-406 |
80℃ |
N52 |
14.3-14.8 |
1430-1480 |
≥10.0 |
≥796 |
≥11 |
≥876 |
50-53 |
398-422 |
60℃ |
N54 |
14.5-15.1 |
1450-1510 |
≥10.0 |
≥796 |
≥11 |
≥876 |
50-53 |
398-422 |
60℃ |
33M |
11.3-11.7 |
1130-1170 |
≥10.5 |
≥836 |
≥14 |
≥1114 |
31-33 |
247-263 |
100℃ |
35M |
11.7-12.2 |
1170-1220 |
≥10.9 |
≥868 |
≥14 |
≥1114 |
33-36 |
263-287 |
100℃ |
38M |
12.2-12.5 |
1220-1250 |
≥11.3 |
≥899 |
≥14 |
≥1114 |
36-39 |
287-310 |
100℃ |
40M |
12.5-12.8 |
1250-1280 |
≥11.6 |
≥923 |
≥14 |
≥1114 |
38-41 |
302-326 |
100℃ |
42M |
12.8-13.2 |
1280-1320 |
≥12.0 |
≥955 |
≥14 |
≥1114 |
40-43 |
318-342 |
100℃ |
45M |
13.2-13.8 |
1320-1380 |
≥12.5 |
≥995 |
≥14 |
≥1114 |
43-46 |
342-366 |
100℃ |
48M |
13.6-14.3 |
1360-1430 |
≥12.9 |
≥1027 |
≥14 |
≥1114 |
46-49 |
366-390 |
100℃ |
50M |
14.0-14.5 |
1400-1450 |
≥13.0 |
≥1033 |
≥14 |
≥1114 |
48-51 |
382-406 |
100℃ |
35H |
11.7-12.2 |
1170-1220 |
≥10.9 |
≥868 |
≥17 |
≥1353 |
33-36 |
263-287 |
120℃ |
38H |
12.2-12.5 |
1220-1250 |
≥11.3 |
≥899 |
≥17 |
≥1353 |
36-39 |
287-310 |
120℃ |
40H |
12.5-12.8 |
1250-1280 |
≥11.6 |
≥923 |
≥17 |
≥1353 |
38-41 |
302-326 |
120℃ |
42H |
12.8-13.2 |
1280-1320 |
≥12.0 |
≥955 |
≥17 |
≥1353 |
40-43 |
318-342 |
120℃ |
45H |
13.2-13.6 |
1320-1360 |
≥12.1 |
≥963 |
≥17 |
≥1353 |
43-46 |
342-366 |
120℃ |
48H |
13.7-14.3 |
1370-1430 |
≥12.5 |
≥995 |
≥17 |
≥1353 |
46-49 |
366-390 |
120℃ |
35SH |
11.7-12.2 |
1170-1220 |
≥11.0 |
≥876 |
≥20 |
≥1592 |
33-36 |
263-287 |
150℃ |
38SH |
12.2-12.5 |
1220-1250 |
≥11.4 |
≥907 |
≥20 |
≥1592 |
36-39 |
287-310 |
150℃ |
40SH |
12.5-12.8 |
1250-1280 |
≥11.8 |
≥939 |
≥20 |
≥1592 |
38-41 |
302-326 |
150℃ |
42SH |
12.8-13.2 |
1280-1320 |
≥12.4 |
≥987 |
≥20 |
≥1592 |
40-43 |
318-342 |
150℃ |
45SH |
13.2-13.8 |
1320-1380 |
≥12.6 |
≥1003 |
≥20 |
≥1592 |
43-46 |
342-366 |
150℃ |
28UH |
10.2-10.8 |
1020-1080 |
≥9.6 |
≥764 |
≥25 |
≥1990 |
26-29 |
207-231 |
180℃ |
30UH |
10.8-11.3 |
1080-1130 |
≥10.2 |
≥812 |
≥25 |
≥1990 |
28-31 |
223-247 |
180℃ |
33UH |
11.3-11.7 |
1130-1170 |
≥10.7 |
≥852 |
≥25 |
≥1990 |
31-34 |
247-271 |
180℃ |
35UH |
11.8-12.2 |
1180-1220 |
≥10.8 |
≥860 |
≥25 |
≥1990 |
33-36 |
263-287 |
180℃ |
38UH |
12.2-12.5 |
1220-1250 |
≥11.0 |
≥876 |
≥25 |
≥1990 |
36-39 |
287-310 |
180℃ |
40UH |
12.5-12.8 |
1250-1280 |
≥11.3 |
≥899 |
≥25 |
≥1990 |
38-41 |
302-326 |
180℃ |
28EH |
10.4-10.9 |
1040-1090 |
≥9.8 |
≥780 |
≥30 |
≥2388 |
26-29 |
207-231 |
200℃ |
30EH |
10.8-11.3 |
1080-1130 |
≥10.2 |
≥812 |
≥30 |
≥2388 |
28-31 |
223-247 |
200℃ |
33EH |
11.3-11.7 |
1130-1170 |
≥10.5 |
≥836 |
≥30 |
≥2388 |
31-34 |
247-271 |
200℃ |
35EH |
11.7-12.2 |
1170-1220 |
≥11.0 |
≥876 |
≥30 |
≥2388 |
33-36 |
263-287 |
200℃ |
38EH |
12.2-12.5 |
1220-1250 |
≥11.3 |
≥899 |
≥30 |
≥2388 |
36-39 |
287-310 |
200℃ |
28AH |
10.4-10.9 |
1040-1090 |
≥9.9 |
≥787 |
≥33 |
≥2642 |
26-29 |
207-231 |
230℃ |
30AH |
10.8-11.3 |
1080-1130 |
≥10.3 |
≥819 |
≥33 |
≥2642 |
28-31 |
223-247 |
230℃ |
33AH |
11.3-11.7 |
1130-1170 |
≥10.6 |
≥843 |
≥33 |
≥2642 |
31-34 |
247-271 |
230℃ |
Common Types of Sintered Strong Neodymium Magnets for Sale by Shape
Strong Nd-Fe-B magnet material has good machinability, is suitable for different machining, and can be customized into various shape, the shape of disc, block/rectangle, ring, cylinder, tube, cube, arc/segment, countersunk, bar, sphere, and cone are the most common types for rare earth neodymium (NdFeB)strong magnets.
Common Types of Powerful Rare Earth Ndfeb Magnets by Surface Treatment
Nickel,Zinc and Epoxy coated neodymium(NdFeB) strong magnets are the most widely used types;
Gold,silver,Teflon coated neodymium strong magnets also used for special application.
The rubber coated neodymium pot magnets and plastic coated neodymium (NdFeB)strong magnets are used as waterproof and rust-resistant neodymium magnets.
Common Types of Sintered Strong Neodymium Magnets for Sale by Grade
N35,N38,N40,N42,N45,N48,N50 and N52 are commonly used neodymium strong magnets, N52 neodymium magnet has the highest magnetic energy product.
The rare earth neodymium magnets with grade of H,SH,UH,EH,AH are used for higher working temperature.
Common Surface Treatments of Sintered Custom Rare Earth Neodymium Magnets and Basic Description for Each Kind of Surface Treatment
Surface |
Coating |
Thickness (Microns) |
Color |
Resistance |
Passivation |
|
1 |
Silver Grey |
Temporary Protection |
Nickel |
Ni+Ni |
10-20 |
Bright Silver |
Excellent Against Humidity |
Ni+Cu+Ni |
||||
Zinc |
Zn |
8-20 |
Bright Blue |
Good Against Salt Spray |
C-Zn |
Shinny Color |
Excellent Against Salt Spray |
||
Tin |
Ni+Cu+Sn |
15-20 |
Silver |
Superior Against Humidity |
Silver |
Ni+Cu+Ag |
10-20 |
Silver |
Superior Against Humidity |
Gold |
Ni+Cu+Au |
10-20 |
Gold |
Superior Against Humidity |
Copper |
Ni+Cu |
10-20 |
Gold |
Temporary Protection |
Epoxy |
Epoxy |
15-25 |
Black,Red,Grey |
Excellent Against Humidity&Salt Spray |
Ni+Cu+Epoxy |
||||
Zn+Epoxy |
||||
Parylene |
Parylene |
5-20 |
Grey |
Excellent Against Humidity,Salt Spray,Superior Against Solvents,Gases, Fungi and Bacteria,FDA Approved |
Chemical |
Ni |
10-20 |
Silver Grey |
Excellent Against Humidity |
Common surface treatment methods of sintered rare earth neodymium(NdFeB) strong magnets are as follows:
Phosphating can be adopted on neodymium strong magnets
Electroplating is the most commonly used surface treatment for strong neodymium magnets.
Electrophoresis is also a surface treatment way for powerful powerful rare earth magnets
Electroless(chemical)plating is used when there are particularly high requirements for corrosion protection.
Organic spraying is adopted when there are different color demands for strong neodymium magnets.
Sintered Neodymium(NdFeB) Strong Magnet Material Physical Properties
Parameter |
International Unit |
Standard Data |
Curie Temperature(Tc) |
℃ |
310-380 |
Maximum Operating Temperature(Tw) |
℃ |
80-230 |
Hardness |
Hv |
620 |
Electrical Resistivity (ᵨ) |
Ω.cm |
1.8x10⁻⁴ ~2.0x10⁻⁴ |
Density(D) |
g/m³ |
7.45~-7.65 |
Recoil Permeability(µ rec) |
|
1.05 |
Magnetization Field Strength(Hs) |
kA/m |
≧2400 |
kOe |
≧30 |
|
Bending Strength |
Mpa |
295-345 |
Temp. Coefficient of Br |
%℃ |
-0.11~-0.12 |
Temp.Coefficient of Hcj |
%℃ |
-0.5~-0.7 |
Rare Earth NdFeB Strong Magnets FAQ
How Strong Are Rare Earth Neodymium Magnets?
Rare earth neodymium magnets are very strong. You'll be surprised! An 8*5mm neodymium round disc magnet can produce a force of more than 1700 g (3.75 lb). They are very strong and have replaced other types of magnets in many applications. Rare earth neodymium magnets are more than ten times stronger than ceramic magnets, so ceramic magnets can be replaced with smaller neodymium magnets and produce the same (or more!) strength. Even small neodymium magnets can cause physical damage. The larger neodymium magnet can break your bones. Handle rare earth neodymium magnets with care!
How Are Rare Earth Neodymium Magnets Made Out?
Rare earth neodymium magnets are mainly made of alloys of neodymium, iron and boron. The specific composition will vary according to the required strength and the purpose of the magnet. Sintering and bonding are two main manufacturing methods of neodymium magnets:
By heating the alloy in the furnace and then making the mixture into ingots, the ingots are ground into fine powder and pressed into the mold, and the powder mold is sintered into dense blocks (sintering is the process of compacting the material and forming solid blocks by heating or pressurization without melting it to the liquefaction point.) The material is cut into its final shape, coated or electroplated, and then magnetized. Thus, the finished sintered neodymium magnets are made out
Bonded neodymium magnets combine neodymium alloy powder with polymer adhesive. These components are pressed or extruded to form more complex shapes and magnetized powders than the commonly available shapes and magnetized powders in sintered magnets.
What Is The Strongest Magnet on Earth?
The strongest magnets must be with the highest magnetic energy,rare earth magnet usually has high magnetic energy,and neodymium rare earth magnet is the strongest magnet on earth.
What Are Rare Earth Neodymium Magnets?
Rare earth neodymium magnets are not ordinary refrigerator magnets! They are the strongest permanent magnets. Perhaps you have never heard of rare earth neodymium magnets before, but you have ever used them before. They are sometimes called neodymium iron boron (NdFeB) or neo magnets. Although rare earth neodymium magnets are super strong, they are also very light, so they are widely used. Without this type of neodymium rare earth magnet, many technological progress in the past few decades are impossible!
If you want to know where to buy large neodymium magnets, please contact us, and we will be your best partner.
As one of industrial magnets suppliers, we will do our best to meet all the needs of customers.
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