×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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!
  • Students Click Here

*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

Jobs

Annealing Finished Products

Annealing Finished Products

Annealing Finished Products

(OP)
Hi everyone,

Is it possible to anneal piping products that have already been final machined? Specifically it is F304/L.
The bar we made the parts from were orginally Normalized and Air Cooled. I need them to be Water Quenched.
Can this be done without ruining the dimensions of the parts or creating scale that would be just too dificult to remove?
(I was considering heat treating in vacuum to prevent scale, but I don't know if that will work or if dimensions will still change).

Please let me know ASAP. THANKS!

RE: Annealing Finished Products

Yes, it is possible but distortion on a final machined product form will be likely. Annealing in an inert atmosphere (bright anneal) will take care of the scaling concerns.

RE: Annealing Finished Products

If this is 304L you don't need water quench, high pressure gas cooling a vacuum furnace will be good enough.
How large are the parts?
You may find someone that can bright anneal these in hydrogen.

Have you looked at a micro?
Why are you annealing?

I ask because the annealing temp will depend on what you are trying to fix.
If the structure is clean then lower temps will work, say 1850F.

Remember that the annealed parts will still have significant residual stresses, they will just be random.

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube

RE: Annealing Finished Products

(OP)
Thanks metengr for the quick response.
EdStainless:
The parts were supposed to be done to A182-F304/L, which requires solution annealing and a liquid quench.
The parts vary from 2" - 5" OD.

I just want to re-anneal the finished parts and liquid quenched them without distorting their dimensions beyond tolerances of, say +-0.030 inches.

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!


Resources