The most recent <em>Edition</em> of B31.1 is the 2001 Edition, published on Dec 10, 2001. Prior to this, the most recent <em>Edition</em> of B31.1 was the 1998 Edition, which included two <em>Addenda</em>. The first was published in 1999, the second in 2000.

The date of the supported codes is reported at the top of the Stress Report. CAESAR II reports: the code name (B31.1), the date of the Edition (1998), and the date of the latest addendum addressed (Sept 15, 2000).

So yes you are correct. CAESAR II Version 4.40 does not yet support the material changes made in the 2001 Edition. We could not implement these changes for the 4.40 release due to the QA involved (considering all the other changes made to the software). Our plan is to make a revised material database available in a <em>build</em> to Version 4.40 as soon as possible. This will involve an additional QA Series on our part, but it is the fastest, safest way to get this change into users hands.

In the meantime, if you must use the new expansion coefficients, you can do so. Just type in the desired coefficient (in units of length/length) in the temperature field. CAESAR II will assume the value is an expansion coefficient if its magnitude is less than the ALPHA_TOLERANCE specified in the configruation file.