×
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

UNS S31803 vs. S32205

UNS S31803 vs. S32205

UNS S31803 vs. S32205

(OP)
Is there an optimal solution annealing temperature for dual certified 2205 (UNS S31803/S32205) to achieve the 5 ksi higher strength requirements of S32205 found in ASTM A789 and A815?  Several datasheets found on-line indicate that a company's S31803 grade has a typical chemistry that mimics the more restrictive S32205, however they refer to the lower mechanical values of the S31803 grade.

RE: UNS S31803 vs. S32205

All S32205 is S38013, but not the other way around.
It isn't an annealing trick.  If you are running the restricted 2205 chemistry you will get the strength.
(And by the way the common term 2205 is S32205.)
The spec strengths are minimums.  In reality everone is getting higher strengths.

In some cases for Code applications you will need dual certified, since only S30813 is listed in some places.  Soon S32205 will be everywhere in the Code and dual cert won't be needed.

= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm

RE: UNS S31803 vs. S32205

(OP)
Within the range of 1870-2010°F, strength is unaffected by annealing at one end of the range versus the other?  Or, would one expect higher strengths and lower ductility by annealing closer to 2010°F and producing a structure with a higher percentage of ferrite?

RE: UNS S31803 vs. S32205

You won't see much variation in mechanical properties.  I have run material at 1875F and at 1950F. It does shift the F/A ratio some, but not enought to really change things.
You could get wild results if you blow the grain size up too much, or if you have trouble with cooling rates.

= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm

RE: UNS S31803 vs. S32205

(OP)
With respect to grain size: 1) Is there a threshold grain size that is correlated to passing mechanical properties?  And, 2) What is the proper etchant to reveal the 2205 grain size?

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