×
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 SMO 254

Welding SMO 254

Welding SMO 254

(OP)
Hi guys,
I have to weld a sheet of S32254 (ASTM A240) to a casting made of the same material CK-3MCuN (ASTM A744). From several readings it seems it's possible to use both 5.11 E-NiCrMo-3 and 5.11 E-NiCrMo-12 consumable electrodes. Does anyone have some experience and knows advantages/disadvantages for the two solution?

Thanks in advance

Domenico

RE: Welding SMO 254

The main disadvantage of using Nb bearing alloys to weld either the 254SMo and the CK3MCuN is that the Nb in the filler metal combines with the N in the base metal to form nitrides that can be embrittling.  It is contained in some of the Avesta literature.  However, it is commony done.  I have experience the most problem when a customer specified that NiCrMo-3 was mandatory, and solution annealing was also required for repairs of CK3MCuN.  There were many tensile and bend failures on weld test due to that.  In the as-welded condition, it isn't as much of a problem.  However, if I have a choice, I choose NiCrMo-10, which has plenty of Mo and no Nb, and avoid the risk all together.  It is a bit more expensive though.

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