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

SS 321H- minimum heat treatment temp 1095 deg C.

SS 321H- minimum heat treatment temp 1095 deg C.

SS 321H- minimum heat treatment temp 1095 deg C.

Hello members,

1. I'm calculating WT to purchase A312-TP321H seamless pipes for design conditions 800°C at 3.5kg/cm2. For thk >3/8", ASME B31.3 mentions note 30 against it in Table A-1 which states "For temperatures above 538°C (1,000°F), these stress values
may be used only if the material has been heat treated at a temperature of 1 093°C (2,000°F) minimum".
However I do not find this note for thk <3/8". The WT that I've calculated are lower than 3/8". So, should I apply note 30 to WT<3/8" too as precautionary measure? Please advise.
One of the reason I think note 30 is not mentioned for <3/8" thk could be that if pipes are cold worked then such high temperature treatment could reverse the benefits of cold working. I'm guessing though, not sure.


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