It should be quite possible to convert CAD data from ISO STEP product data files (*.stp, *.step) and save them as a 3D CAD format (*.3d) which is used by several CAD programs. Probably used for 3D modeling.
Convert ISO-10303 STEP product data to 3D drawing CAD file.
We found 2 software records in the database related to .stp to .3d file format conversion.
Microsoft Windows software - convert stp to 3d on Windows
The leading 3D-CAD/CAM software for all fields of timber construction
Convert from stp file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned stp to 3d. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
3D viewer and converter with huge file type support