Thank you for the update. I will create a new custom material library then recreate and check my materials as needed.
I created new temperature dependent materials in both imperial and metric units and saved them in both the default library and my custom library. When I opened each one in the editor in the other unit system, the first temperature data point for each property was converted, but the properties at additional temperatures were not converted. In other words, for each property, only the first point on the temperature curve was converted.
Thank you for working on this. Unfortunately, for now, our ASME standards list material properties with imperial units, but usually the FEA results must be reported with metric units.