×
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

Interpass Temperature in Manufacturing of ASTM A403

Interpass Temperature in Manufacturing of ASTM A403

Interpass Temperature in Manufacturing of ASTM A403

(OP)
In the manufacturing of a reducer per ASTM A403 Gr.WP 321 Cl. WX (100%RT).

A manufacturer welded with control of maximum interpass temperature at 200 Deg.C. In my welding knowledge, this is too high for maximum interpass temperature and crack resistibility deteriorates with high interpass temperature.

Please comment for this case...Is this high interpass temperature for welding austenitic stainless steel accepted by other customers?

RE: Interpass Temperature in Manufacturing of ASTM A403

PAN;
The interpass is definitely higher than what I would use for austentic stainless steels. However, in dealing with 321 stainless, this is a stabilized grade, and a little more tolerant for higher interpass temperature. I would probably accept it.

RE: Interpass Temperature in Manufacturing of ASTM A403

(OP)
metengr,

The filler metal for the welding is from AVESTA 347. In my understanding, the limit of maximum interpass temperature is 150 Dec.C.

Please advise me about the reference which indicates the higher interpass temperature limit in case of welding Type 321 or Type 347.

RE: Interpass Temperature in Manufacturing of ASTM A403

PAN;
The suggested limit of a maximum 150 deg C interpass temperature applies to all austenitic stainless steel welding to reduce susceptibility to sensitization during welding, not "crack resistibility" as you reported. This interpass temperature limit is conservative to keep heat input during welding to a minimum value or as low as practicable.  

Your manufacturer had unfortunately worked outside this suggested range. My comment regarding tolerance of interpass temperature above applies to the stabilized grades of austenitic stainless steels (like 321 and 347). Do I have a specific reference to allow for higher interpass temperature, no, not off the top of my head. If the NDT was performed after welding, and no indications were reported, the only concern is the amount of sensitization from the higher interpass temperature. If you need to disposition this nonconformance, have a coupon welded under the same conditions as the fitting was welded and evaluate the degree of sensitization using one of the ASTM test methods.  

RE: Interpass Temperature in Manufacturing of ASTM A403

Would a hardness tell more than NDT in regards to the issue of to high of an interpass temp?

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