A summary of the magnet grade specifications and coatings is given below:-
Neodymium Iron Boron / NdFeB magnetic properties (minimum values):-
+80 deg C maximum recommended operating temperature (Nxx range)
N27:- Br=1.13T, Hc=796kA/m, Hci=955kA/m, (BH)max=119kJ/m^3
N30:- Br=1.17T, Hc=796kA/m, Hci=955kA/m, (BH)max=223kJ/m^3
N33:- Br=1.22T, Hc=836kA/m, Hci=955kA/m, (BH)max=247kJ/m^3
N35:- Br=1.25T, Hc=868kA/m, Hci=955kA/m, (BH)max=263kJ/m^3
N38:- Br=1.28T, Hc=899kA/m, Hci=955kA/m, (BH)max=287kJ/m^3
N40:- Br=1.32T, Hc=907kA/m, Hci=955kA/m, (BH)max=302kJ/m^3
N42:- Br=1.38T, Hc=915kA/m, Hci=955kA/m, (BH)max=318kJ/m^3
N45:- Br=1.4T, Hc=923kA/m, Hci=955kA/m, (BH)max=342kJ/m^3
N48:- Br=1.43T, Hc=923kA/m, Hci=955kA/m, (BH)max=366kJ/m^3
N50:- Br=1.08T, Hc=796kA/m, Hci=876kA/m, (BH)max=382kJ/m^3
N52:- Br=1.13T, Hc=796kA/m, Hci=876kA/m, (BH)max=398kJ/m^3
(please note N50 and N52 are rated to +60 deg C)
+100 deg C maximum recommended operating temperature (NxxM range)
N30M:- Br=1.17T, Hc=796kA/m, Hci=1115kA/m, (BH)max=223kJ/m^3
N33M:- Br=1.22T, Hc=836kA/m, Hci=1115kA/m, (BH)max=247kJ/m^3
N35M:- Br=1.25T, Hc=868kA/m, Hci=1115kA/m, (BH)max=263kJ/m^3
N38M:- Br=1.28T, Hc=899kA/m, Hci=1115kA/m, (BH)max=286kJ/m^3
N40M:- Br=1.32T, Hc=923kA/m, Hci=1115kA/m, (BH)max=302kJ/m^3
N42M:- Br=1.38T, Hc=955kA/m, Hci=1115kA/m, (BH)max=318kJ/m^3
N45M:- Br=1.4T, Hc=995kA/m, Hci=1115kA/m, (BH)max=342kJ/m^3
N48M:- Br=1.08T, Hc=1027kA/m, Hci=1115kA/m, (BH)max=366kJ/m^3
N50M:- Br=1.13T, Hc=1033kA/m, Hci=1115kA/m, (BH)max=382kJ/m^3
+120 deg C maximum recommended operating temperature (NxxH range)
N30H:- Br=1.17T, Hc=796kA/m, Hci=1355kA/m, (BH)max=223kJ/m^3
N33H:- Br=1.22T, Hc=836kA/m, Hci=1355kA/m, (BH)max=247kJ/m^3
N35H:- Br=1.25T, Hc=868kA/m, Hci=1355kA/m, (BH)max=263kJ/m^3
N38H:- Br=1.28T, Hc=899kA/m, Hci=1355kA/m, (BH)max=286kJ/m^3
N40H:- Br=1.32T, Hc=923kA/m, Hci=1355kA/m, (BH)max=302kJ/m^3
N42H:- Br=1.37T, Hc=955kA/m, Hci=1355kA/m, (BH)max=318kJ/m^3
N45H:- Br=1.08T, Hc=955kA/m, Hci=1355kA/m, (BH)max=342kJ/m^3
N48H:- Br=1.13T, Hc=995kA/m, Hci=1355kA/m, (BH)max=366kJ/m^3
+150 deg C maximum recommended operating temperature (NxxSH range)
N30SH:- Br=1.17T, Hc=804kA/m, Hci=1590kA/m, (BH)max=223kJ/m^3
N33SH:- Br=1.22T, Hc=844kA/m, Hci=1590kA/m, (BH)max=247kJ/m^3
N35SH:- Br=1.25T, Hc=876kA/m, Hci=1590kA/m, (BH)max=263kJ/m^3
N38SH:- Br=1.28T, Hc=907kA/m, Hci=1590kA/m, (BH)max=286kJ/m^3
N40SH:- Br=1.32T, Hc=939kA/m, Hci=1590kA/m, (BH)max=302kJ/m^3
N42SH:- Br=1.02T, Hc=987kA/m, Hci=1590kA/m, (BH)max=318kJ/m^3
N45SH:- Br=1.08T, Hc=1003kA/m, Hci=1590kA/m, (BH)max=342kJ/m^3
+180 deg C maximum recommended operating temperature (NxxUH range)
N28UH:- Br=1.13T, Hc=764kA/m, Hci=1990kA/m, (BH)max=207kJ/m^3
N30UH:- Br=1.18T, Hc=812kA/m, Hci=1990kA/m, (BH)max=223kJ/m^3
N33UH:- Br=1.22T, Hc=852kA/m, Hci=1990kA/m, (BH)max=247kJ/m^3
N35UH:- Br=1.25T, Hc=860kA/m, Hci=1990kA/m, (BH)max=263kJ/m^3
N38UH:- Br=1.04T, Hc=899kA/m, Hci=1990kA/m, (BH)max=287kJ/m^3
N40UH:- Br=1.08T, Hc=899kA/m, Hci=1990kA/m, (BH)max=302kJ/m^3
+200 deg C maximum recommended operating temperature (NxxUH range) N28EH:- Br=1.14T, Hc=780kA/m, Hci=2385kA/m, (BH)max=207kJ/m^3
N30EH:- Br=1.17T, Hc=812kA/m, Hci=2385kA/m, (BH)max=223kJ/m^3
N33EH:- Br=1.22T, Hc=836kA/m, Hci=2385kA/m, (BH)max=247kJ/m^3
N35EH:- Br=1.13T, Hc=876kA/m, Hci=2385kA/m, (BH)max=263kJ/m^3
N38EH:- Br=1.22T, Hc=899kA/m, Hci=2385kA/m, (BH)max=287kJ/m^3
+220/230 deg C maximum recommended operating temperature (NxxVH /AH range)
N33VH / AH:- Br=1.13T, Hc=836kA/m, Hci=2706kA/m, (BH)max=239kJ/m^3
