Allowable compressive stress of low alloy steel at 550 Deg C

[Senthil Kumar]

Anybody, could you please your reply,?
I am designing currenytly a low alloy steel reactor(SA387 Gr.22 Cl.2)with height 50 meter and design temp 550 Deg C. Software gives error showing allowable compressive stress is missing at 550 Deg C. As per ASME sec II part D (Chart CS-2 and CS-3) also does not have this allowable stress values. How to calculate this allowable compressive stress.

 

[TGS4]

There are no allowable compressive stresses, because you are in the creep regime, and the Code doesn't (yet) have creep buckling rules.