Try searching under Permeable Alloys, you'll have a lot of choices

Hacksaw: A Google search for Permeable alloys brings up mostly technical papers.  I don't see many choices there.

I've been looking for a supplier for Cunife for a while too.  Can you recommend a supplier?

these people have been in the business for decades:

http://www.magnetic-shield.com/faq/pma.html

and a few more leads:
http://www.hitachi-metals.co.jp/e/prod/prod06/p06_23.html

http://www.thomasnet.com/products/magnetic-alloys-1210608-1.html

 

Hacksaw:  Thank you for the links, but they are for mumetal shielding, or the like.  Cunife is not suitable for magnetic shielding, it is a (weak) permanent magnet with high ductility.  It does not have high permeability.

Any other ideas?

You're right about the hardness of the 30-60% Cu alloys.

Your best bet is to contact Arnold and have them do the leg work, they have alternatives to CuNiFe and CuNiFe but the thicknesses is the issue

the 60-20-20 cunife is for an audio application,  thanks anyways  

solutions exist but not for casual interests. Things are better now. The last time I needed ferro-alloys alloys in bulk form it was a 10,000 lb minimum



http://www.alloys.com/custom-and-specialty-alloys/index.aspx

Hacksaw:  That look like a good company, but it appears that they just provide bulk metal, to a specific composition.

Getting Cunife is not a matter of just ordering a specific composition alloy.  Cunife needs to also be heat treated and drawn down to achieve proper magnetic properties.

You are right that this is not something for casual interests.  The inquiries I get are generally for small quantities in designs that have been in use for decades.  When I can, I switch them to some other material, but it is not easy.  That's why I was hoping you knew of someone that still makes the material (after heat treating & drawing)  It appears that the market for Cunife is too small to support whatever applications remain.

Thanks anyway.

Fully cognizant of difficulty of getting finished forms, material tests, purities, BH testing, etc. We had access to a fully decked out research lab for support. Custom materials were never easy but figuratively not impossible.

Sounds like an opportunity to create a new design.

thare are alternative alloys that cover the CuNiFe class of materials in terms of ductility and magnetic hardness. You might consider them in rod form.

Please specify which alloys you had in mind.  

Sources for them would be helpful too.