Installation Default Directory: Custom Property Models

All Property Models (whether these are predefined or custom models) must be located in a subdirectory of the Property Model directory. You can go to the Options window then on the General tab the Model directory field displays the default directory.

To open the Options window:

  • Windows: Select Tools → Options menu icon Options.
  • Mac: Select Thermo-Calc <version> → Preferences or Settings or press <⌘> on the keyboard.

Predefined models included with the Property Model Calculator are installed in the locations below based on your operating system. If you create your own models using TC-Python, this is the default directory where these are saved.

Operating System Property Model Installation Directory
Windows

C:\Program Files/Thermo-Calc/2025b\PropertyModels
Linux

On Linux all user files are installed where the program is installed. If installed as root the default is:

/opt/Thermo-Calc/2025b/PropertyModels

or:

/home/<username>/Thermo-Calc/2025b/PropertyModels
macOS

/Applications/Thermo-Calc-2025b.app/Contents/Resources/PropertyModels