×
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

P91 hardness testing

P91 hardness testing

P91 hardness testing

(OP)
When the normal stress release process and the result of low hardness What could be the reason?

RE: P91 hardness testing

You mean after post weld heat treatment you have low hardness. This could be caused by over tempering or improper original heat treatment
of Grade 91.

RE: P91 hardness testing

False low readings can also be the result of inadequate surface preparation.

RE: P91 hardness testing

Failure to remove the decarburized surface layer may also be a contributing factor.

RE: P91 hardness testing

All of the above are possible, but they assume the tech doing the hardness testing knows what he is doing. There are a dozen ways field hardness testing can go wrong.

"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: P91 hardness testing

go with metengr because i have experienced this kind of problem lot

RE: P91 hardness testing

(OP)
The whole process of heating fine registration process has nevertheless have low hardness
  Could be a difference between the results from this device EQUOTIP-2 and brinell testing method?

RE: P91 hardness testing

The EQUOTIP hardness values have been shown to be consistently lower than that obtained from Brinell testing. ARAMCO has published studies in this regard. SIA has also shown similar results from tests performed on P91 welds supplied by my company.

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