The only step to dgn conversion we know of, would be using CAD/3D data from STEP product files (.stp, .step) to produce MicroStation drawings files (.dgn). MicrosStation itself is most likely the best choice for this, but any other tool that can work with DGN format should suffice for this.
Home > Search converters: step to dgn
Conversion of step file format to dgn file format beta
Search for step to dgn converter or software able to handle these file types.
Convert ISO-10303 STEP product data file to MicroStation drawing.
We have found 5 software records in our database eligible for .step to .dgn file format conversion.
Microsoft Windows software 
- convert step to dgn on Windows
MicroStation
A CAD software from Bentley used for 2D and 3D design and drawing
File extension | Convert | Open | Save | Edit | Create | Import | Export | Extract |
|---|---|---|---|---|---|---|---|---|
Convert from step file | No | No | No | No | No | Yes | Yes | No |
to dgn file | No | Yes | Yes | dgn editor | Yes | No | No | 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 step to dgn. 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.
Solid Edge
A feature rich 3D CAD software by Siemens
TurboCAD
A family of 2D/3D CAD software products for Windows
PolyTrans|CAD+DCC
A 3D CAD translation software
Apple macOS / Mac OS X software 
- convert step to dgn on OS X
TurboCAD for Mac
A 2D/3D CAD software for OS X
Additional links: Open step file, Open dgn file
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.
DGN
Files with dgn extension might be found as CAD design files created using the MicroStation software.
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