×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

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.

Students Click Here

Data on Initial Permeability

Data on Initial Permeability

Data on Initial Permeability

(OP)
I am looking for data on initial permeability of some common steels(e.g. AISI 420, UNI 100Cr6 equiv to AISI 52100)

By initial permeability (the term was new to me), I mean the low field limit of the relative (dimensionless) magnetic permeability, not the max DC permeability.  The initial permeability of the material is that which is probed by eddy current testing and metal detection (in low kHz to MHz freq range).

I would assume that for the materials above, the value is of the order 100.  I would like to know how the initial permeabilities for these two materials differ and what % variation from nominal could be expected between batches of balls of these steels.

RE: Data on Initial Permeability

Relative permeability tables are in ASM Ready Reference: Electrical and Magnetic Properties of Metals (ISBN 0-87170-690-3)

RE: Data on Initial Permeability

Thanks howard. I shall try and see what information I get from the ASM ready reference.

harim

You may also visit my website ( which I started recently for news / info on NDT related topics - http://www.megaone.com/uncaharry

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! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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