The only way to reliably export .scdoc files would be to use the original program SpaceClaim in which they were made. The software supports several other formats for output / exchange purposes and apparently it also support SO STEP product data files (.stp, .step).
Home > Search converters: scdoc to step
Conversion of scdoc file format to step file format beta
Search for scdoc to step converter or software able to handle these file types.
Convert SpaceClaim 3D CAD document to ISO-10303 STEP product data file.
We have found one software suitable in our database for this conversion.
Microsoft Windows software 
- convert scdoc to step on Windows
SpaceClaim
A 3D solid modeler for engineers
File extension | Convert | Open | Save | Edit | Create | Import | Export | Extract |
|---|---|---|---|---|---|---|---|---|
Convert from scdoc file | No | Yes | Yes | scdoc editor | Yes | No | No | No |
to step file | No | No | No | No | No | No | Yes | No |
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.
Additional links: Open scdoc file, Open step file
SCDOC
Files with scdoc extension can be found as as 3D CAD data files from the SpaceClaim 3D solid modeler.
STEP
Files with step extension are quite often found as 3D model / part files saved in STEP (Standard for the Exchange of Product Data) format.
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