The neodymium magnets, together with the samarium magnets, are part of the rare earth group and represent the latest generation of magnetic materials. These magnets have properties very superior to the traditional ones, being at the moment the most powerful magnets of the market.



The neodymium magnets, together with the samarium magnets, are part of the rare earth group and represent the latest generation of magnetic materials. These magnets have properties very superior to the traditional ones, being at the moment the most powerful magnets of the market.



High precision neodymium magnets form a wide range of shapes, sizes and grades.


The characteristics of the neodymium magnets are shown in the following table of qualities. It indicates the remanence of the magnets, the coercive force, the working temperatures and the minimum and maximum resistance.


GradeNomenclatureRemanenceCoercive forceIntrinsic coerciveMaxium energy productWorking temp
BrbHcFuerza Ihc(BH) max
Neodimyum MagnetsBr max (T)Br min (T)HcB min (kA/m)HcB max (kA/m)HcJ min (kA/m)HcJ max (kA/m)BHmax min (kJ/m³)BHmax max (kJ/m³)Max. Temp. trabajo: (ºC)
NdFeB N33 anistropicN33NdFeB  247/961,141,17820876955-24726380
NdFeB N35 anistropicN35NdFeB  263/961,171,20860900955-26327980
NdFeB N38 anistropicN38NdFeB  287/961,221,26900915955-28730380
NdFeB N40 anistropicN40NdFeB  303/961,261,29908924955-30331880
NdFeB N42 anistropicN42NdFeB  318/961,291,31915939955-31833480
NdFeB N45 anistropicN45NdFeB  342/961,331,36924955955-34235880
NdFeB N48 anistropicN48NdFeB  367/881,381,40810860875-36738380
NdFeB N50 anistropicN50NdFeB  383/881,401,43794860875-38339880
NdFeB N52 anistropicN52NdFeB  398/881,421,45794860875-39841480
NdFeB N35M anistropicN35MNdFeB  263/1111,171,208689001114-263279100
NdFeB N38M anistropicN38MNdFeB  287/1111,221,269009391114-287303100
NdFeB N40M anistropicN40MNdFeB  303/1111,261,299249551114-303318100
NdFeB N42M anistropicN42MNdFeB  318/1111,291,329559871114-318334100
NdFeB N45M anistropicN45MNdFeB  342/1111,331,3597110031114-342358100
NdFeB N30H anistropicN30HNdFeB  223/1351,081,127948361353-223239120
NdFeB N33H anistropicN33HNdFeB  247/1351,141,178368761353-247263120
NdFeB N35H anistropicN35HNdFeB  263/1351,171,208689001353-263279120
NdFeB N38H anistropicN38HNdFeB  287/1351,221,269009391353-287303120
NdFeB N40H anistropicN40HNdFeB  303/1351,261,289249551353-303318120
NdFeB N42H anistropicN42HNdFeB  318/1351,281,309559871353-318334120
NdFeB N33SH anistropicN33SHNdFeB  247/1601,141,178448761595-247263150
NdFeB N35SH anistropicN35SHNdFeB  263/1601,171,208769001595-263279150
NdFeB N38SH anistropicN38SHNdFeB  287/1601,221,259089391595-287303150
NdFeB N40SH anistropicN40SHNdFeB  303/1601,251,279399631595-303318150
NdFeB N42SH anistropicN42SHNdFeB  318/1601,281,309559871595-318334150
NdFeB N33UH anistropicN33UHNdFeB  247/1991,131,158448761990-247263180
NdFeB N35UH anistropicN35UHNdFeB  263/1991,171,198769001990-263279180
NdFeB N38UH anistropicN38UHNdFeB  287/1991,221,259089391990-287303180
NdFeB N28EH anistropicN28EHNdFeB  207/2391,041,087808112388-207223200
NdFeB N30EH anistropicN30EHNdFeB  223/2391,081,128048442388-223239200
NdFeB N33EH anistropicN33EHNdFeB  247/2391,131,158448762388-247263200
NdFeB N30AH anistropicN30AHNdFeB  223/2631,081,128048442626-223239220
NdFeB N33AH anistropicN33AHNdFeB  247/2631,131,158448762626-247263220
NdFeB N34AH anistropicN34AHNdFeB  247/2551,101,168369002547-247271220
NdFeB N35AH anistropicN35AHNdFeB  263/2631,171,198769152626-263279220

Type of material

Rare Earth


Neodymium (Nd)
Iron (Faith)
Boron (B)

Work temperature

From 80ºC to 200ºC


Powerful magnets
High coercivity and remanence
Application in confined spaces


Neodymium magnets are magnetic elements with greater remanence and high coercivity. Thanks to its magnetic properties, the neodymium magnet is the most powerful on the market, being the most used in the industrial sector.

Neodymium magnets in equal size with other magnets, such as ferrite, are stronger, even in some cases, being smaller, can withstand more strength.

Work temperature:

The temperature is one of the factors to take into account in the application of the magnet.

Currently in IMA we have a wide range of magnets that cover temperatures from 80ºC to 200ºC in Neodymium, from 200ºC to 350ºC, we have the alternative of Samario magnets.


NíquelNi+NI10-20 µmSilver (bright)Excellent resistance to the humid atmosphere200°C
 Ni+Cu+NI  Resistance superior to the humid atmosphere 
ZincZn azul8-20 µmBlue-silverGood resistance to salinity 
Color ZnExcellent resistance to salinity160°C
EstañoNi+Cu+Sn15-20 µmSilver brightResistance superior to the humid atmosphere160°C
CobreNi+Cu10-20 µmgoldTemporary treatment 
EpoxiNi+Cu+epoxy15-25 µmblackExcellent resistance to weather and salinity120°C

An additional protection for the neodymium magnet will ensure long-term maintenance and durability, avoiding losing its properties and possible corrosion by external or atmospheric chemical agents.

The solution is the coating of the magnet by means of a coating that can be made of different materials such as epoxy, nickel, zinc, copper and others. In this way, the magnet can withstand lower temperatures and prevent its oxidation.


The set of magnetic properties offered by neodymium magnets allows multiple applications, through great strength and better performance than other materials such as ferrite or alnico:

The manufacture of this magnet by sintering, allows us to achieve a wide variety of designs and shapes, to meet the needs of customers.


Neodymium magnets must go through different stages of the production process to be subsequently distributed and meet the needs of our customers.

In the first instance, the raw materials or rare earths are introduced in an oven where they are melted, casting the material obtained in molds and cooling it to create solid pieces. A very fine powder is then produced from the solid mass obtained above, which passes through the sintering phase where the state changes to liquid. In this process, the particles are magnetically aligned and bound together to create dense pieces. These pieces are heat treated, cut to the desired shape and size, and finally, subjected to treatments against corrosion. Finally, they magnetize and the magnet is created. That subsequently, it is tested to certify its quality.