A neodymium magnet (also known as NdFeB, NIB or Neo magnet) is the most widely used type of rare-earth magnet. It is a permanent magnet made from an alloy of neodymium, iron, and boron to form the Nd2Fe14B tetragonal crystalline structure. Neodymium magnets are the strongest type of permanent magnet available commercially and commonly used in neo pot magnets.

Typical forms and sizes of Neodymium magnets

Magnetic Properties of Neodymium Magnets in Different Grades

Grade Br (kg) HcB (KOe) Hci (KOe) BHmax (MGOe) Working Temperature TW
N35 11.7-12.2 ≥10.9 ≥12.0 33-36 80°C
N38 12.2-12.5 ≥10.9 ≥12.0 36-39 80°C
N40 12.5-12.8 ≥11.4 ≥12.0 38-41 80°C
N42 12.8-13.2 ≥11.5 ≥12.0 40-43 80°C
N45 13.2-13.8 ≥11.6 ≥12.0 43-46 80°C
N48 13.8-14.2 ≥11.6 ≥12.0 46-49 80°C
N50 14.0-14.5 ≥10.0 ≥11.0 48-51 80°C
N52 14.3-14.8 ≥10.0 ≥11.0 50-53 80°C
N55 14.5-15.0 ≥10.0 ≥11.0 53-55 80°C
N35M 11.7-12.2 ≥10.9 ≥14.0 33-36 100°C
N38M 12.2-12.5 ≥11.3 ≥14.0 36-39 100°C
N40M 12.5-12.8 ≥11.6 ≥14.0 38-41 100°C
N42M 12.8-13.2 ≥12.0 ≥14.0 40-43 100°C
N45M 13.2-13.8 ≥12.5 ≥14.0 43-46 100°C
N48M 13.6-14.3 ≥12.9 ≥14.0 46-49 100°C
N50M 13.9-14.4 ≥12.9 ≥14.0 49-51 100°C
N52M 14.2-14.7 ≥12.9 ≥14.0 50-53 100°C
N35H 11.7-12.2 ≥10.9 ≥17.0 33-36 120°C
N38H 12.2-12.5 ≥11.3 ≥17.0 36-39 120°C
N40H 12.5-12.8 ≥11.6 ≥17.0 38-41 120°C
N42H 12.8-13.2 ≥12.0 ≥17.0 40-43 120°C
N45H 13.2-13.8 ≥12.0 ≥17.0 43-46 120°C
N48H 13.7-14.3 ≥12.5 ≥17.0 46-49 120°C
N50H 13.9-14.4 ≥13.0 ≥17.0 49-51 120°C
N52H 14.2-14.7 ≥13.0 ≥17.0 49-53 120°C
N35SH 11.7-12.2 ≥11.0 ≥20.0 33-36 150°C
N38SH 12.2-12.5 ≥11.4 ≥20.0 36-39 150°C
N40SH 12.4-12.8 ≥11.8 ≥20.0 38-41 150°C
N42SH 12.8-13.2 ≥12.4 ≥20.0 40-43 150°C
N45SH 13.2-13.8 ≥12.6 ≥20.0 43-46 150°C
N48SH 13.6-14.2 ≥12.6 ≥20.0 46-49 150°C
N50SH 13.9-14.5 ≥12.6 ≥20.0 48-50 150°C


Samarium Cobalt magnets are high-performance energy products ranging to 32MGOe. SmCo magnets are better able to withstand higher temperatures than other rare earth magnets. SmCo magnet is a high performance, low-temperature coefficient permanent magnet made of samarium and cobalt and other rare-earth elements. Its biggest advantage is its high working temperature—350 degree centigrade. It needn’t be coated because it is difficult to be eroded and oxidized.

Typical forms and sizes of Samarium Colbalt Magnets
a table on magnetic properties of samarium cobalt magnetic material


Alnico Magnets can be made by both cast and sintered processes. Alnico Magnets have distinct advantages over other varieties of permanent magnets in terms of moderate prices & widest temperature stability. Alnico is very hard and brittle. Machining or drilling can not therefore be accomplished by ordinary methods. Holes are usually cored in at the foundry. Magnets are cast or sintered as closely as possible to required size so that abrasive grinding to finish dimensions and tolerances are minimized.

close up of alnico magnets

Magnetic Properties

a table on magnetic properties of cast alnico
a table on magnetic properties of sintered alnico magnets

Hard Ferrite (Ceramic)

Hard Ferrite (Ceramic) magnet is manufactured from oxide materials using powder metallurgical process. Hard ferrite magnet is most widely used because of its low cost, high-energy, good electric insulation and excellent resistance to demagnetization. The most common type of hard ferrite magnet is anisotropic strontium, anisotropic barium and isotropic barium magnet.

Hard Ferrite (Ceramic) magnet has the following advantages: high coercive force, high electric resistance, long-time stability, and economical price.

close up of ceramic magnets

Magnetic Properties

a table on the magnetic properties of ceramic magnets


The Iron-Chromium-Cobalt alloys (FeCrCo)are formed either by casting to size or by casting in the form of an ingot which is then rolled and/or drawn either to final shape or to form which can then be cut. Heat treatment is essential to develop the magnetic properties. The magnetic properties can be increased in a preferred direction by applying a magnetic field during heat treatment. Although this alloy is hard and brittle in its fully heat-treated condition, it is sufficiently ductile to be rolled, drawn, machined, turned or threaded prior to its final heat treatment.

FeCrCo Magnets have similar properties to cast Alnico 5 but, unlike cast alnico, the FeCrCo magnets are actually easier to machine than Alnico. FeCrCo can be hot deformed.
The maximum recommended operating temperature is typically around +400 degrees C (752F).

Typical Application for FeCrCo Magnets:

Typical forms and shapes of Iron Chrome Cobalt Magnets

· Compasses
· Hysteresis coupling applications

Typical Magnetic Properties and Chemical Compositions of iron-chromium-cobalt magnet materials

Soft Magnets

Soft magnetic materials are those materials that are easily magnetised and demagnetised.They typically have intrinsic coercivity less than 1000 Am-1.They are used primarily to enhance and/or channel the flux produced by an electric current.

Soft magnetic materials are mainly used in generators, transformers, motors, coils, antennas, switches, etc.

ESSEN now can offer:
· Iron-Silicon Alloys
· Iron-Cobalt Alloys
· Nickel-iron alloys
· Soft Ferrites

close up of soft magnets

Typical Magnetic Properties of Soft Magnets

Other Manget Products

As an industrial magnet manufacturer, Essen Magnetics produces magnet assembly, magnets for motor, and metal injection molding for different industrial applications. We also offer customized production for individual use cases.