×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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

Full Penetration and Full Fusion

Full Penetration and Full Fusion

Full Penetration and Full Fusion

(OP)
Can anyone tell me difference between full penetration welding and full fusion welding?
Thanks in advance

RE: Full Penetration and Full Fusion

Full penetration means you have weld metal from one side of the joint to the other, i.e. you remove the backing after welding.

Full fusion means the filler metal (or in the case of no filler metal the joining metal) is completely bonded to the parent metal. Ex. soldering is not full fusion.

RE: Full Penetration and Full Fusion

(OP)
Thank you, Hush for your response.

If so, I could say that full penetration weld is always full fusion. Is that right?

Kyong

RE: Full Penetration and Full Fusion

Hmmm. Not necessarily so. You could have a full pen weld that was not completely fused. Of course then you'd gouge it out and reweld, so in the end you're right.

RE: Full Penetration and Full Fusion

I believe that you can have a full penetration weld that is not completely fused and it can still be acceptable.ASME B31.3 table 341.3.2 gives limits of allowable imperfections, therefore a full penetration weld that was not fully fused would be acceptable under limitations placed in 341.3.2 symbol C on criterion value notes gives depth and cumulative of lack fusion permissible in relevant service conditions, i am assuming of course that you are working to B31.3

Fusion in B 31.3 is defined as 'the melting together of filler metal and base metal, or of base material only which results in coalescence. If you mean full fusion to be interpretated as complete fusion then complete fusion is defined in section IX as "fusion which has occurred over entire base material surfaces intended for welding, and between ALL layers and passes.

i also take that when you say full penetration you mean full weld joint penetration, joint penetration is defined in ASME section IX as "The distance the weld metal extends from the weld face INTO a joint, exclusive of weld reinforcement"

hope this helps

RE: Full Penetration and Full Fusion

(OP)
Hush and johnc01!

Thank you very much.
Now I understood.

kyong

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


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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