×
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

Heat Treatment Inconel
2

Heat Treatment Inconel

Heat Treatment Inconel

(OP)
Treating Inconel at 700°C can create any problem?

RE: Heat Treatment Inconel

What alloy of Inconel?

RE: Heat Treatment Inconel

(OP)
ASTM B444
UNS N06625

RE: Heat Treatment Inconel

625 is not strengthened by a specific heat treatment. Heating at 700 deg C may result in slightly higher mechanical properties as a result of precipitation of certain phases. However, this does not embrittle the material nor seriously impact corrosion resistance.

RE: Heat Treatment Inconel

Read the seamless tube spec, B166, you will see that the final mechanical properties depend on the specific annealing temp.
If there has been any welding or cold work then this temp is clearly too low.
I don't know why you would bother with this temp, you will not even get good stress relief until you heat to 850C or so.
If your service temp is below 550C then don't bother with a heat treatment unless you can go hotter.

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube

RE: Heat Treatment Inconel

(OP)
the heat treatment (at 700°) is not intended for the item in 625 but for the item to which it is welded to;
my concern was related to the fact that the item in 625 could be adversely affected because of this heat treatment.

RE: Heat Treatment Inconel

what material do you want to weld to the 625?

RE: Heat Treatment Inconel

(OP)
Welded Low alloy Cr, Mo; for this it is required PWHT @ 700°C.
It is forseen a buttering between Cr,Mo and 625 if we want to avoid treat them together, but I was in doubt about the possibility to do it.

RE: Heat Treatment Inconel

You should no issues with PWHT at 700 deg C for the DMW joint, and buttering.

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