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

Question about Rp...

Question about Rp...

Question about Rp...

Dear cybermen and cyberwomen,
I wish want ask  a very simple question to you , I hope that someone answer me as soon as possible!!
Is there one formula that it converts Rp(0,2)t into Rp(1,0)t for austenitic steels, for example?
If it thereisn't, how I do to obtain the value of Rp(1,0)t of these materials?
Thanks to everybody that I will answer me.

Eng. Antonino Nicosia

my website: web.tiscali.it/aeronavigandosulweb

RE: Question about Rp...

The terms Rp (1.0) and Rp(0.2) refer to proof (tensile yield) stress values at 1% and 0.2% permanent deformation, respectively. These values are determined from standard tensile tests, and there is no conversion formula.

RE: Question about Rp...

Thanks metengr
but I know it, I ask you if there was some particular formula to compute this conversion...do you know Roark's formulas for structural field? I searched something of similar...

RE: Question about Rp...

To obtain Rp(1.0) values, you need to coduct tensile tests and obtain this data at 1% strain.

RE: Question about Rp...

There is no specific formula to convert among proof stresses at varying strain levels.

If the material follows a hardening law (like Holloman), then you may be able to use that.

Use an Internet search engine and look for Holloman, strain, hardening.



Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

RE: Question about Rp...


Eng. Antonino Nicosia
Aeronautical Engineer specialized in Fluid Power field.

my website: web.tiscali.it/aeronavigandosulweb
(in the future there will be many programs about fluid power problems, thermal and structural problems)

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


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