You can download following magnet grades’ demagnetization files free. Each excel file contains all the B(H) Demagnetization Datasets for a specific grade, sequentially listed for several temperatures.
Version 2 also identifies the crucial Knee Point of a grade for each temperature. MagWeb shows its value with 4 decimals.
All magnets should be operated above such Knee Point (‘Safe Operating Range SOR) – otherwise the magnet loses its performance. MagWeb shows SOR Data in green color. Within SOR, the flux density inside a magnet is reversible. Outside SOR it is irreversible
Table. Free B(H) Demagnetization Data for Magnets
CatCode | Category | Manufacturerer Grade |
AM | Neodymium Magnets | Arnold Magnetics N40UH |
AM | Neodymium Magnets | Hitachi Metals NMX-48BH |
BM | Samarium Cobalt Magnets | Dexter Magnetics S3218 |
BM | Samarium Cobalt Magnets | Electron Energy Corp 20-T500 |
CM | Bonded Molded Magnets | BMG 2560 |
CM | Bonded Molded Magnets | Kolektor 86EP |
DM | Ferrite Magnets | Dexter Magnetics HF085 |
DM | Ferrite Magnets | TDK FB138 |
EM | Alnico Magnets | HPMG LNGT18 |
EM | Alnico Magnets | Thomas & Skinner Alnico 9 |