STP/STEP is a fairly common product data CAD format so it is likely many 3D/CAD programs can import it and then further export to some other 3D format, like the 3DS from 3D Studio Max. List of CAD / 3D modeling tools known to be capable of stp to 3ds conversion is listed below.
Home > Search converters: stp to 3ds
Conversion of stp file format to 3ds file format beta
Search for stp to 3ds converter or software able to handle these file types.
Convert ISO-10303 STEP product data to 3ds Max (3D Studio MAX) graphics.
We have found 10 software records in our database eligible for .stp to .3ds file format conversion.
Microsoft Windows software 
- convert stp to 3ds on Windows
3ds Max (3D Studio Max)
A widely-used 3D animation application from Autodesk
File extension | Convert | Open | Save | Edit | Create | Import | Export | Extract |
|---|---|---|---|---|---|---|---|---|
Convert from stp file | No | No | No | No | No | Yes | Yes | No |
to 3ds file | No | Yes | Yes | 3ds editor | Yes | Yes | Yes | No |
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 3ds. 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.
CINEMA 4D
CINEMA 4D is a 3D modeling, animation and rendering program developed by MAXON
IronCAD
A 3D modelling application
PolyTrans|CAD+DCC
A 3D CAD translation software
3D Object Converter
3D viewer and converter with huge file type support
Autoconverter
A converter for 3D formats
TurboCAD
A family of 2D/3D CAD software products for Windows
Apple macOS / Mac OS X software 
- convert stp to 3ds on OS X
TurboCAD for Mac
A 2D/3D CAD software for OS X
On-line services software 
- convert stp to 3ds on web
Online CAD converter
A commercial online CAD converter
Babel3D
An online CAD conversion service
Additional links: Open stp file, Open 3ds file
STP
Files with stp extension can be typically found as CAD format in the STEP, a ISO standard for the computer-interpretable representation and exchange of industrial product data.
3DS
Files with 3ds file extension can be commonly found as 3D computer graphics created using 3D Studio Max software as well its successor product 3ds Max by Autodesk.
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