×
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

Weld Heat Affected Zone definition

Weld Heat Affected Zone definition

Weld Heat Affected Zone definition

(OP)
On what parameters is a Heat Affected Zone defined, compliant to the ASME Codes??

Is it on the thikness like t/4 + weld width?
Is it on the weld width itself, like weld width + 1/4 of it??

Thanks to everyone!

RE: Weld Heat Affected Zone definition

Per the ASM dictionary, HAZ is ' the portion of the base metal that was not melted during.. welding, but whose microstructure and mechanical properties were altered by the heat'.  So the HAZ width depends on a lot of factors, which would include heat input, base material type and thickness, etc.  
Expect in most cases that the HAZ is going to be very narrow, probably less than 1/8"

RE: Weld Heat Affected Zone definition

Now the question comes, to avoid HAZ (heat affected zone), how much minimum distance should be kept between the two
welds?

As part of good engineering practice, we usually keep a gap of: -

Maximum of "5 times the thickness of thicker member" and "50 mm" between the two welds.

RE: Weld Heat Affected Zone definition

I'm not sure that ASME has any specific requirements for HAZ dimensions.

Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/

RE: Weld Heat Affected Zone definition

ASME does not gave any specific requirements on this subject. There have been previous postings regarding spacing between adjacent weld toes in piping. European standards might have more information on this subject.

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