×
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

Does material lose strength when flame-cut?
3

Does material lose strength when flame-cut?

Does material lose strength when flame-cut?

(OP)
At shop we flame-cut plates with our CNC cutters.
At sites, to correct mis-fits we flame-cut pipes and plates with oxy-acetylene torches and proceed to weld them.
Inspectors reject whatever is flame-cut at sites, but for some reasons they dont question our factory procedures.

Why is that?

thanks



RE: Does material lose strength when flame-cut?

The issue may not be related to the material loosing strength, but an issue with the quality of the cut edges.

Best regards - Al

RE: Does material lose strength when flame-cut?

2
IJR...to answer your first question, for mild steels the strength does not change except in a very localized sense which might become either quenched or annealed, depending on the cooling. Neither is significant in the whole scheme of things for flame cutting. Essentially, flame cutting is not much different than welding in its affect on the base metal. It creates a similar heat affected zone (HAZ).

Agree with gtaw that it is probably a visual rejection based on the way the flame cut looks. Field cutting is usually done with expedience....with larger tips and higher oxygen pressure....just to literally "blow and go". You might want to specify or suggest a smaller cutting tip to give a "finer" cut appearance.

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


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