×
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

SA material vs A material
2

SA material vs A material

SA material vs A material

(OP)
What is the difference in using say SA335 VS A335.  Is there differnt documentation?  I always thought the material and stress values were the same.  I've been told that ASME Section 1 requires SA material to be specified rather than A material

RE: SA material vs A material

2
The difference between an SA versus A designation has to do with ASME Boiler and Pressure Vessel code endorsement of material. If a material is supplied to an SA material specification, this material meets the requirements of ASME Boiler and Pressure Vessel Code, Section II, and can be used in code-fabricated items. If a material is supplied with an A designation, it meets the requirements of ASTM.

In some cases A and SA material designations can be equivalent, in other cases they may not be equivalent with material that is an A designation not even permitted for use in code fabrication. So, review ASME Section II, Part A Acceptable ASTM Editions.

RE: SA material vs A material

(OP)
Thanks Metengr,

I appreciate your response.

Dahar

RE: SA material vs A material

I think in most cases they are identical.  ASME incorporates ASTM specifications into Section II.  But what is incorporated into Section II isn't always the latest version of ASTM.  I don't think it's an intentional effort to have a different spec, just lack of being caught up all the time.

RE: SA material vs A material

For convenience, the ASME material spec will specifically indicate that it is identical to the ASTM if that is the case.  It will say so right on the first page.

Steve Braune
Tank Industry Consultants
www.tankindustry.com

RE: SA material vs A material

dahar-

Its usually far easier to just specify SA materials, but the Code does provide you some wiggle room. I'd suggest reading the section on Acceptable ASTM Editions starting on page xlvii of Section IIA. The key thing to note is the quote Materials for Code use should preferably be ordered, produced, and documented on this basis; however, material produced under an ASTM Specification may be used in lieu of the corresponding ASME Specification as listed in this Appendix...

A335 is on page l (that's Roman 50, not one). The material is identical with several exeptions.

jt

RE: SA material vs A material

jte:
"identical with exceptions" huh?

RE: SA material vs A material

ASME: Always, Sometimes, Maybe, with the Exception of.

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