We have found one software suitable in our database for this conversion.
SolidWorks certainly allows import of DWG files, so if any kind of dwg to sldmat conversion is possible, it would be with SolidWorks. We have not found any specific information about such conversion, except that many databases of material properties are available online, for example at matweb.com website.
Updated: January 12, 2023
DWG
A dwg file extension is used for common CAD file format, originally used by AutoCAD. A DWG is a proprietary format and can only be created in AutoCAD. Other CAD programs can usually import it, but not create its proprietary form. It's because of this, that DWGs are often exported to DXF interchange format, so they can be seamlessly used in other CAD programs.
SLDMAT
A sldmat file extension is related to the SolidWorks and used for its material database files.