Hello,

I am using Caesar II 2016.

I chose A672-B60 CL.13 on the Caesar II, and it shows :

1. Allowable Stress : Vacant
-> This is okay, I can type it as per B31.1.

2. Thermal Coeficient at 100'C : 0.000911 mm/mm
-> However, for other carbon steel (eg. A53-B), it is 0.000956 mm/mm.
-> Why different?

3. Elastic Modulus at 100'C : 1.9816 * 10^5 Mpa
-> For other carbon steel (eg. A53-B), it is 1.9816 * 10^5 Mpa.
-> This is okay.

4. Poissson's Ratio : 0.292
-> However, for other carbon steel (eg. A53-B), it is 0.3.
-> Why different?

Even though A672-B60 CL.13 and A53-B is grouped in the the carbon steel in Appendix B & C of B31.1, why thermal coefficinet and poisson's ratio are different from each other?