×
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

A36 normalized steel ?

A36 normalized steel ?

A36 normalized steel ?

(OP)
Hi there, this is my first post here!
I have been digging in the search results for a while, but I could not find what I'm looking for, so here I am.

I'm dealing with MDMT issues, and so I have to find the exact reference on ASTM standard, stating that A36 can (or cannot?) be normalized.

On paragraph 6 of ASTM 36 it is specified that A36 can be  supplied also as semi-killed or killed steel... but what about a "heat threatment" paragraph (similar to paragraph 5 of ASTM 516..) ?

The problem is that, according to UCS-66, each non-normalized carbon / low alloy steel belonging to Curve A, when normalized, shall be grouped with Curve-B materials (except for some exceptions :P), thus taking an advantage on the resulting MDMT.

Now I believe that A36 can not be normalized, but the problem is that I'm using a commercial pressure vessel software that on the contrary allows me to include A36 in UCS-66 Group B materials..

So, I'm quite confused. Anybody can help me on this topic?
Thank you, CIAO !

RE: A36 normalized steel ?

A36 is not supplied in a normalized or normalized and tempered condition. It can be supplied in a fully killed condition resulting in a finer grain structure, but that is it and it must be specified by the Purchaser.

Also, it is not permitted for use in Section VIII, Div 1 as A 36, this material would need to be certified as ASME SA 36 and follow the useage requirements in UCS-6.

According to UCS-66, SA 36 would fall under Curve A.

RE: A36 normalized steel ?

fedeghi, you should review UCS-6 for use of SA-36.

It may or may not be practical, but PWHT when not required by Code can get you a 30 deg. F MDMT reduction, see UCS-68.

Regards,

Mike

RE: A36 normalized steel ?

fedeghi,
Why would you design a vessel using SA-36, killed with fine grain melting practice when you could use SA-516 Gr70 and take advantage of the higher Code design allowables and greater temperature range?  

RE: A36 normalized steel ?

(OP)
Stanweld, I agree with your suggestion: we are actually using Sa-516 Gr70 for each "plate-shaped" details, such as shell courses and bended profiles.

The problem is that some reinforcing external profiles (L shaped, C shaped and IPE profile) should be bended and welded on-site, because some big vessels will be assembled on site.
We wanted to have an easy site assembly solution, thus avoiding to manufacture the C shapes in field...

At the moment we have decided to manufacture as much as possible with 516Gr70, but it would be nice to find an alternative solution...

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