Re: [femm] RE: Find "silicon core iron" material

[David Meeker <dmeeker@xxxxxxxx>]

Xia Chen wrote:

> Hi, David,
>
> By any chance, do you know the B-H curve of 50% Fe, 50% Nickle, or in
> other words, what is permeability of this material?
> Thanks!

Well, you could look at the properties of Carpenter's Alloy 49, which is 
nearly half Ni and half Fe.

One page with some info is:

http://www.hightempmetals.com/hitempAlloy49data.htm

A pretty good fit to some bh data for Alloy 49 that I have is:

b = h + (118047.4575815765*h)/(1 + 8.237863511848953*h)

here h is in oersted and b is in gauss and h>=0.