Cobalt Steels

US $200.00



Cobalt Steels employ 12 to 50% of Cobalt to increase the saturation flux density (by ~ 13%) to about 2.4 Tesla.   Vanadium is added to increase ductility. They are sold under a variety of trade names such as Hiperco, Vacodur.  Some are optimized to deliver superior magnetic properties (and inferior mechanical properties) and vice versa.  Specific annealing procedures, recommended by a manufacturer, should be used to attain their high flux density capability. Those with higher cobalt are rather expensive; they are used in aerospace industry where small size and light weight is more important than cost. Those with lower cobalt are less expensive; but their magnetic properties are less attractive.

MagWeb’s Cobalt Steel Folder has 243 excel files listing magnetic properties of these materials, produced by 4 manufacturers.  Of these, 51 files contain B(H) magnetization curves/permeability curves while 192 files contain core loss curves.  For a full list of commercial names of all these materials, please click on List of Materials.

By downloading this Folder, you will have 243 files on the magnetic properties of all Cobalt Steels manufactured world wide at your finger tips!

Version 5 also contains a DIGEST file which lists all materials and their discrete properties in a single excel file.

Please review the Handbook for more technical information on these Cobalt Steel materials.

This website is designed for automated download of Folders (containing the magnetic property files) via credit card. If you wish to purchase via quote/purchase order, please email to


Additional information


Image, Excel