I am designing a Section VIII-1 heat exchanger with design conditions 1058°F at 80 psig. I am using SS321H. While I do have all the stress values for SS321H at this temperature from Section II-D, Section II-D does not provide yield stresses for any materials over 1000F, which is causing Compress to crash. Does anyone have any suggestions for handling this?
Part UHX provides a means to obtain yield strength from external prressure charts, by reference to UG-28©. Look up in Part UHX nomenclature the definitions for Sy. You are then directed to UG-28© Step 3. Start reading at the words “Values of yield strength…”, second sentence. Note that it is unrelated to geometry.
Since Chart HA-2 has a temp line for 1500 F, I don’t see why you could not apply the procedure.
Above is a snippet.