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Neodymium material specification
Material grade (Energy content, BHmax)

The strength of a magnet can be found in the magnet specification known as BHmax, which is the maximum energy density of a magnet. This is defined in Mega Gauss Oersteds, or MGOe. On a Magnetic Demagnetization Curve this is the highest point of the magnet’s strength, or the magnet’s maximum energy product.

For Neodymium (NdFeB) Magnets the BHmax will range, in general, from 30 MGOe to 55 MGOe. So, when choosing or defining your magnet, keep in mind that the higher the number, the stronger the magnet. Neodymium magnets produce the highest MGOe of any permanent magnet material. The most common grades of Neodymium magnets are N35, N38, N40, N42, N45, N48, N50, N52, and N55.

Working temperature (Coercivity, HcJ)

When you look at the magnet table of available materials there are different letters after some of the grades. These letters represent the magnet’s ability to withstand demagnetization forces, which can be temperature or other magnetic forces working against the magnet. We define the coercive force using the most common system, the lettering system. This letter system uses the following letters after the grade to define the magnets specification to fight demagnetization forces: M, H, SH, UH, EH, and AH.

When a letter is used after a magnet grade, it indicates that that specific material has a greater ability to fight demagnetizing forces. For our purpose, we are going to use heat as the demagnetizing force as it is most common force effecting the magnet. And, the following examples are “general rules” and not “hard and fast rules”.

A Neodymium Magnet with no letter after the grade, i.e. N38, or N45, or N52, would indicate that it has the ability to work in an environment that has a maximum operating temperature no greater than 80C°. A magnet with an “M” (i.e. N35M, N42M, etc.) generally means that a magnet can be used in an operating environment up to 100C. An “H” material is good up to 120C, “SH” up to 150C, “UH” up to 180C, “EH” up to 200C, and a “TH” up to 220C. Again, these are general specifications and other factors do play a role in coercivity decisions.

Below you can see a table with all the Neodymium grades Hyab can offer. This list updates frequently since higher specified grades develops yearly. For example, grades with greater BHmax expands to have a better coercivity - can withstand higher demagnetization forces, like heat. Contact us if you would like to know more about the different grades. We help clients daily with customized solutions for their project.

Material
grade
Remanence Coercivity Max energy product Working temperature
Br HcB HcJ (BH)max
Gauss (kG) Tesla (T) kOe kA/m kOe kA/m kJ/m3 MGOe °C
N33 11.3 - 1.17 1.13 - 1.17 10.5 ≥836 12 ≥955 247 - 271 31 - 34 ≤80
N35 11.7 - 12.2 1.17 - 1.22 10.9 ≥868 12 ≥955 263 - 287 33 - 36 ≤80
N36 12.1 - 12.3 1.21 - 1.23 11.0 ≥875 12 ≥955 280 - 298 35 - 37 ≤80
N38 12.2 - 12.5 1.22 - 1.25 11.3 ≥899 12 ≥955 287 - 310 36 - 39 ≤80
N40 12.5 - 12.8 1.25 - 1.28 11.4 ≥907 12 ≥955 302 - 326 38 - 41 ≤80
N42 12.8 - 13.2 1.28 - 1.32 11.5 ≥915 12 ≥955 318 - 342 40 - 43 ≤80
N45 13.2 - 13.8 1.32 - 1.38 11.6 ≥920 12 ≥955 342 - 366 43 - 46 ≤80
N48 13.8 - 14.2 1.38 - 1.42 11.6 ≥923 12 ≥955 366 - 390 46 - 49 ≤80
N50 14.0 - 14.5 1.40 - 1.45 10.5 ≥796 12 ≥876 382 - 406 48 - 51 ≤80
N52 14.3 - 14.8 1.43 - 1.48 10.0 ≥796 12 ≥876 398 - 422 50 - 53 ≤80
N33M 11.3 - 11.7 1.13 - 1.17 10.5 ≥836 14 ≥1114 247 - 271 31 - 34 ≤100
N35M 11.7 - 12.2 1.17 - 1.22 10.9 ≥836 14 ≥1114 263 - 287 33 - 36 ≤100
N38M 12.2 - 12.5 1.22 - 1.25 11.3 ≥899 14 ≥1114 287 - 310 36 - 39 ≤100
N40M 12.5 - 12.8 1.25 - 1.28 11.6 ≥923 14 ≥1114 302 - 326 38 - 41 ≤100
N42M 12.8 - 13.2 1.28 - 1.32 12.0 ≥955 14 ≥1114 318 - 342 40 - 43 ≤100
N45M 13.2 - 13.8 1.32 - 1.38 12.5 ≥836 14 ≥1114 342 - 366 42 - 46 ≤100
N48M 13.6 - 14.3 1.36 - 14.3 12.9 ≥1027 14 ≥1114 366 - 390 46 - 49 ≤100
N50M 14.0 - 14.5 1.40 - 1.45 13.0 ≥1033 14 ≥1114 382 - 406 48 - 51 ≤100
N52M 14.2 - 14.8 1.42 - 1.48 13.2 ≥1036 14 ≥1114 398 - 422 50 - 53 ≤100
N30H 10.8 - 11.3 1.08 - 1.13 10.0 ≥796 17 ≥1353 223 - 247 28 - 31 ≤120
N33H 11.3 - 11.7 1.13 - 1.17 10.5 ≥836 17 ≥1353 247 - 271 31 - 34 ≤120
N35H 11.7 - 12.2 1.17 - 1.22 10.9 ≥868 17 ≥1353 263 - 287 33 - 36 ≤120
N36H 12.1 - 12.3 1.21 - 1.23 11.0 ≥875 17 ≥1353 280 - 298 35 - 37 ≤120
N38H 12.2 - 12.5 1.22 - 1.25 11.3 ≥899 17 ≥1353 287 - 310 36 - 39 ≤120
N40H 12.5 - 12.8 1.25 - 1.28 11.6 ≥923 17 ≥1353 302 - 326 38 - 41 ≤120
N42H 12.8 - 13.2 1.28 - 1.32 12.0 ≥955 17 ≥1353 318 - 342 40 - 43 ≤120
N45H 13.2 - 13.7 1.32 - 1.37 12.2 ≥963 17 ≥1353 342 - 368 43 - 46 ≤120
N48H 13.6 - 14.3 1.36 - 1.43 12.5 ≥995 17 ≥1353 366 - 390 46 - 49 ≤120
N50H 14.0 - 14.5 1.40 - 1.45 12.6 ≥1000 17 ≥1270 382 - 406 48 - 51 ≤120
N30SH 10.8 - 11.2 1.08 - 1.12 10.1 ≥804 20 ≥1592 223 - 243 28 - 32 ≤150
N33SH 11.3 - 11.7 1.13 - 1.17 10.6 ≥844 20 ≥1592 247 - 271 31 - 34 ≤150
N35SH 11.7 - 12.2 1.17 - 1.22 11.0 ≥876 20 ≥1592 263 - 287 33 - 36 ≤150
N36SH 12.1 - 12.3 1.21 - 1.23 11.3 ≥900 20 ≥1592 280 - 298 35 - 37 ≤150
N38SH 12.2 - 12.5 1.22 - 1.25 11.4 ≥907 20 ≥1592 287 - 310 36 - 39 ≤150
N40SH 12.5 - 12.8 1.25 - 1.28 11.8 ≥939 20 ≥1592 302 - 326 38 - 41 ≤150
N42SH 12.8 - 13.2 1.28 - 1.32 12.4 ≥987 20 ≥1592 318 - 342 40 - 43 ≤150
N45SH 13.2 - 13.8 1.32 - 1.38 12.6 ≥1003 20 ≥1592 342 - 366 43- 46 ≤150
N48SH 13.6 - 14.2 1.36 - 1.42 12.8 ≥1018 20 ≥1592 366 - 390 46 - 49 ≤150
N30UH 10.8 - 11.3 1.08 - 1.13 10.2 ≥812 25 ≥1990 223 - 247 28 - 31 ≤180
N33UH 11.3 - 11.8 1.13 - 1.18 10.5 ≥836 25 ≥1990 247 - 271 31 - 34 ≤180
N35UH 11.7 - 12.2 1.17 - 1.22 10.8 860 25 ≥1990 263 - 287 33 - 36 ≤180
N38UH 12.2 - 12.5 1.22 - 1.25 11.0 876 25 ≥1990 287 - 310 36 - 39 ≤180
N40UH 12.5 - 12.8 1.25 - 1.28 11.5 899 25 ≥1990 302 - 326 38 - 41 ≤180
N42UH 12.8 - 13.2 1.28 - 1.32 11.8 ≥940 25 ≥1990 318 - 342 40 - 43 ≤180
N28EH 10.2 - 10.8 1.02 - 1.08 9.8 ≥780 30 ≥2388 207 - 231 26 -29 ≤200
N30EH 10.8 - 11.3 1.08 - 1.13 10.2 ≥812 30 ≥2388 223 - 247 28 - 31 ≤200
N33EH 11.3 - 11.7 1.13 - 1.17 10.5 ≥836 30 ≥2388 247 - 271 31 - 34 ≤200
N35EH 11.7 - 12.2 1.17 - 1.12 10.8 ≥864 30 ≥2388 263 - 287 33 - 36 ≤200
N36EH 12.1 - 12.3 1.21 - 1.23 11.0 ≥875 30 ≥2388 280 - 298 35 - 37 ≤200
N36EH 12.1 - 12.3 1.21 - 1.23 11.0 ≥875 30 ≥2388 280 - 298 35 - 37 ≤200
N36EH 12.1 - 12.3 1.21 - 1.23 11.0 ≥875 30 ≥2388 280 - 298 35 - 37 ≤200
N38EH 12.2 - 12.5 1.22 - 1.25 11.3 ≥899 30 ≥2388 287 - 310 36 - 39 ≤200
N40EH 12.5 - 12.8 1.25 - 1.28 11.5 ≥915 30 ≥2388 247 - 271 38 - 41 ≤200
N30AH 10.8 - 11.3 1.08 - 1.13 10.5 ≥819 35 ≥2785 263 - 287 28 - 31 ≤230
N33AH 11.3 - 11.7 1.13 - 1.17 10.8 ≥843 35 ≥2785 287 - 310 31 - 34 ≤230
N35AH 11.7 - 12.2 1.17 - 1.22 11.0 ≥876 35 ≥2785 263 - 287 33 - 36 ≤230
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