Re: But why? The question of ASTM A312-TP321

From: <M.>
Date: Wed Mar 17 2004 - 00:39:00 EST

Dear Friends;
I am not an expert in such subject, but I wanted to reform the question. How a material can have two different strengths depending on the thickness?. My knowledge tills me that strength is a constant whatever the dimensional changes of an element.

Regards
Maged A. Tageldin
Sr. Mechanical Engineer
SETE Technical Services S.A.

• Original Message ----- From: chenysh To: PipingDesign@yahoogroups.com Sent: Wednesday, March 17, 2004 3:39 AM Subject: [PipingDesign] But why? The question of ASTM A312-TP321

   Dear all experts,
   In the Standard of ASTM A312, I have a doubt about the material TP321.    As the Standard described, The Tensile Requirement of this material, t<3/8 in, is 75ksi; t>3/8in, is 70ksi. But in the Old Edition, there is no these differences.

   Who can give me a explain.
   Thanks for your any coments.

   regards,

   ChenYueshuang

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[Non-text portions of this message have been removed] Received on Wed Mar 17 00:39:00 2004