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

- To: femm@yahoogroups.com
- Subject: Re: [femm] RE: Find "silicon core iron" material
- From: David Meeker <dmeeker@ieee.org>
- Date: Tue, 30 Jul 2002 12:23:40 -0400
- References: <Pine.LNX.4.31L.02.0207292053380.16715-100000@linux2.gl.umbc.edu>
- User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.0.0) Gecko/20020530

`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.`

- References:
  - Re: [femm] RE: Find "silicon core iron" material
    - From: Xia Chen <xchen4@umbc.edu>

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