Some CAD programs accept CAD drawings even in PostScript form that is prepared for printing. So it is possible that EPS to STEP is possible, with program that supports both of these file types. May not be perfect conversion for complex CAD files.
Convert Encapsulated PostScript file to ISO-10303 STEP product data.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert eps to step on Windows
A high-end professional 3D modelling software solution from Ashlar Vellum, Argon shares the same solid and surface modeling, rendering engine and animation tools found in other Ashlar programs like Cobalt or Xenon.
Convert from eps file
to step file
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.