×
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

Difference between F55 and UNS 32760

Difference between F55 and UNS 32760

Difference between F55 and UNS 32760

(OP)
Hi,
We have an on-going projects which requires valves to be F55. Our vendor offered UNS32760 which is not accepted. What is the difference between F55 (forged material) and UNS32760(Forged bar)?

Thanks

RE: Difference between F55 and UNS 32760

F55 links to a specification, the UNS number can be attached to many different specifications.
What spec is your document requiring?
It is the product spec that matters most, not what you call the grade (you may be wrong).

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

RE: Difference between F55 and UNS 32760

(OP)
Thank you EdStainless,
We have received an offer from vendor showing UNS32760 Super Duplex body, whilst our client datasheet shows ASTM A182F55.

RE: Difference between F55 and UNS 32760

cnergy,
ASTM A182 F55 is UNS 32760
Why was it not accepted ?
Regards,
DD

RE: Difference between F55 and UNS 32760

(OP)
DD, it was not accepted since UNS32760 was forged bar stock while F55 according to them is forged material.
I re-read your comments, so F55 is equivalent to UNS32760? Is there a good reference where we can refer to our client as back-up? Thanks,cnergy13

RE: Difference between F55 and UNS 32760

No, if UNS 32760 (by the way, a UNS is just a chemistry, with not restrictions on the manufacturing methods) is made to the requirements of A182, then it meets your spec.
F55 is simply an alternate name that was given to the alloy and has no meaning outside of A182.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

RE: Difference between F55 and UNS 32760

cnergy,
It is not equivalent - F55 is UNS 32670
ASME IX 2015 Page 95 (second line from the bottom)
ASTM A182 Table 2 Page 11 (third line from top)
Regards,
DD

RE: Difference between F55 and UNS 32760

The issue appears to be the specific product form rather than any grade designation. A182 is clear on where bar can and cannot be used. If there is no additional specification modifying such use, then the resolution is also clear.

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/pub/8/83b/b04

All answers are personal opinions only and are in no way connected with any employer.

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