With utilities like 3D Object Converter or 3D-Tool it should be quite possible to convert models saved in SGI Inventor VRML format (.iv) to some other 3D format, including STEP product data files (.step, .stp).
Convert SGI Inventor 3D format to ISO-10303 STEP product data.
We have found 2 software records in our database eligible for .iv to .stp file format conversion.
Microsoft Windows software - convert iv to stp on Windows
3D viewer and converter with huge file type support
Convert from iv 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 iv to stp. 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.
A CAD viewer program with conversion capabilities