×
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

HTHA in Carbon Steel

HTHA in Carbon Steel

HTHA in Carbon Steel

(OP)
I have the task of examining possible HTHA damage in aged carbon steel pipe removed from service. Little if any damage is suspected. The method is optical metallography.

I am looking for some experience and recommendations for a metallography protocol. How are welds and HAZs affected compared to base metals? At this point I plan to examined it unetched and then etched, at magnifications ranging from low to as high as possible.

I have reviewed API RP941 and RP571; the latter mentions surface decarburization. Given that many steels start service with surfaces already decarburized at the mill, how reliable is this?

"If you don't have time to do the job right the first time, when are you going to find time to repair it?"

RE: HTHA in Carbon Steel

(OP)
Outstanding as always, a nice little synopsis of the problem.

Don't know where we would all be without you, metengr.

"If you don't have time to do the job right the first time, when are you going to find time to repair it?"

RE: HTHA in Carbon Steel

You might look up a paper by Mark Evans, The Potential UK Energy Gap and Creep Life Prediction Methods, Metallurgical and Materials transactions A, vol 44A, Jan 2013.
I found it on the internet.
It may not address your question, but the bibliography is a great resource of its own on this subject.

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

RE: HTHA in Carbon Steel

(OP)
Thanks Ed,
I was unable to locate a version that did not request a large number of British pounds. Any hints?

"If you don't have time to do the job right the first time, when are you going to find time to repair it?"

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