Dear Richard,

I am working on CII ver 2018 using B31.3 2016.
My query is also related to this thread.

Although for the mat. B423 UNS N08825 the thermal exp. data is available upto -50 deg C in the code but I think CII database has not been updated so far to cover this temp. range. I observe it reads the data upto 28 deg C and beyond that starts giving error.

Hope my observation is correct.

Meanwhile I think I can create a user defined mat. including the thermal exp. data to proceed.

Thanks and Rgds.
Ashok Kumar