×
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

Welding dissimilar metals

Welding dissimilar metals

Welding dissimilar metals

(OP)
Can anyone tell me if there are any repercussions when welding stainless steel pipe to carbon steel pipe.I assume there exists transition weld electrodes but not sure if this practice can be applied to design of a chemical plant due to the ordering of wrong material.  

RE: Welding dissimilar metals

You do realize that, for piping, this can be a flanged connection (mechanical joint) ?

   

RE: Welding dissimilar metals

(OP)
Thanks MJ but problem is we have bought stainless steel socket weld valves for carbonsteel piping.I heard in the distant past of weld electrodes for welding carbon steel pipe to stainless steel but dont know if the practice is acceptable,the integrity of the weld etc.

RE: Welding dissimilar metals

RE: Welding dissimilar metals

I don't think it's any problem to make the weld, just that you may have dissimilar metal corrosion going on in the future.

RE: Welding dissimilar metals

amanites,
What will be painted on the welded joints?

RE: Welding dissimilar metals

(OP)
if the line is insulated there will be a primer coat and if the line is not insulated there will be 2 coats plus a coded colour.Do you need to know the thickness or quality of paint?.

RE: Welding dissimilar metals

amanites,
Yes, I'm interested in your paint system on stainless steel surface and dissimilar welded joints. I do not worry about welding dissimilar materials. However, I worry about protective paint system for corrosion prevention. This is off-topic. Sorry for all.

RE: Welding dissimilar metals


You can weld stainless steel to carbon steel, if you told us the spec of your SS it will be easy for the forum to give you the correct filler metal.


Regards

luis marques  

RE: Welding dissimilar metals

(OP)
Thanks Luis,the SS spec is 304L

RE: Welding dissimilar metals

amanites,

What is your design temperature?

All members,
This case is socket welding. Should we suggest him for dissimilar welding?

RE: Welding dissimilar metals

To weld 304L to carbon steel you can use E310-15 or E309-15.

The problem related with this kind of weld is the possibility of galvanic corrosion.

regards

luis marques

RE: Welding dissimilar metals

(OP)
Thanks once again Luis,do we have any idea how long before this corrosion starts to happen?

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