Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.


Link To This Forum!

Partner Button
Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.
Just copy and paste the
code below into your site.

looking for cunife 60% cu 20% ni 20% fe

looking for cunife 60% cu 20% ni 20% fe

  are supplies of cunife stock for machining available anywhere?  I've already tried google but no luck.

Thanks in advance

RE: looking for cunife 60% cu 20% ni 20% fe

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

RE: looking for cunife 60% cu 20% ni 20% fe

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?

RE: looking for cunife 60% cu 20% ni 20% fe

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?

RE: looking for cunife 60% cu 20% ni 20% fe

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

RE: looking for cunife 60% cu 20% ni 20% fe

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

RE: looking for cunife 60% cu 20% ni 20% fe

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.

RE: looking for cunife 60% cu 20% ni 20% fe

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.

RE: looking for cunife 60% cu 20% ni 20% fe

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.

RE: looking for cunife 60% cu 20% ni 20% fe

Please specify which alloys you had in mind.  

Sources for them would be helpful too.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close