×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

*
*
*
*

Thanks. We have received your request and will respond promptly.

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

Bar internal soundness

thread330-483846

Bar internal soundness

Bar internal soundness

(OP)
This is a query basically related to the language and its interpretations (my native language is Spanish).
A client request us: "Each rolled bar which will be used for tube manufacture shall be examined for internal soundness by taking macro specimens at each end of the bar".
My doubt is related to the word "soundness". Does it mean, free from defects? is it about inclusions content? pores? all of them?
Unfortunately my client (who did not make the specification) also has difficulties in interpreting it
Thanks in advance.

RE: Bar internal soundness

Soundness might be interpreted as mechanical integrity or solidness.
I wouldn't link it to inclusions or stringers which are more microstructural defects.
But relate it to pipe, porosity, cracks, lapps and those types of defects.
Normally when someone says this they give you an acceptance criteria.
A macro from each end is fine, but what is the standard? Simply that they are solid?

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

RE: Bar internal soundness

The "good" bar is going to be processed into a tube?

RE: Bar internal soundness

I presume that it will be hot pierced to make hollows, that is common with steel.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

RE: Bar internal soundness

Your client's requirements should include some standard for taking and evaluating these specimens. Typically it would be an ASTM or ISO standard. You can take, and examine, all the samples you want, but without a specific acceptance criteria for evaluating these samples, you will not be able to tell whether or not they meet the standard.

RE: Bar internal soundness

(OP)
Dear, thank you very much for your answers.
I fully understand that in order to evaluate some carachteristics a criteria is necessary. In this case my question was more of a lenguaje interpretation. Many times the literal translations do not show the real expectations of the person requesting it.

RE: Bar internal soundness

What they mean by soundness is lack of imperfections, particularly near the center of the bar. What type of imperfections? That is why you need to know the acceptance criteria. Presumably, they mean any imperfections that may affect their ability to process the bar. That is too vague, unfortunately, as it does not let the supplier know what to avoid. In general, when one speaks of the "internal soundness" of a solid bar, they are concerned with voids, piping, cracks, and other discontinuities.

RE: Bar internal soundness

I would concur with EdS's interpretation as being reasonable and well, very sound. (sorry)

If you took it to extremes you could condemn a bar on the basis of atomic vacancies. (Don't laugh, I have interacted with adult engineers at mega EPCs who wanted to take requirements to almost such a ridiculous extreme.)

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

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