×
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

Stainless and carbon steel in concrete

Stainless and carbon steel in concrete

Stainless and carbon steel in concrete

(OP)
I'm reviewing a project which includes fillet welding of two plates made of carbon steel and stainless steel (Type 304).
The joint will not be loaded (it's a seal joint). It will be exposed to air first and then completely immersed in concrete.
Is this environment harmful to a c-steel/stainless steel joint?
Would it be enough, maybe not even necessary, to paint both plates after welding?
Is it necessary to change materials to stainless steel only?
Thanx

RE: Stainless and carbon steel in concrete

Carbon steel should be buttered with 309 or 312 stainless before welding to 304 with 347 filler metal.
304L should be preferred to 304 to avoid sensitization (susceptibilty to corrosion as a consequence of precipitation of chromium carbides).

http://www.welding-advisers.com/

RE: Stainless and carbon steel in concrete

Is there any chance of this joint ever seeing any water?

The concern about sensitization of the stainless is not only will it corrode more rapidly but there is also a greater chance for cracking.
I have seen CS to SS seals made using a narrow strip of 309 welded to each side.  You could use 309 filler for both welds.

= = = = = = = = = = = = = = = = = = = =
Corrosion, every where, all the time.
Manage it or it will manage you.
http://www.trent-tube.com/contact/Tech_Assist.cfm

RE: Stainless and carbon steel in concrete

(OP)
EdStainless,
no, the joint will never see water.

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