This is the FreeCAD standard material library. It's intended to gather the most common Material definitions. How to do a description is explained here: https://www.freecadweb.org/wiki/Material To make the material description useful for a lot of applications only files with the (CC BY 3.0) license will be accepted into the FreeCAD source distribution. For more detail about the license, see here: http://creativecommons.org/ Please help! Enlargen the base of Materials for FreeCAD will greatly benefit the usability of FreeCAD. So please help us to add new Materials, review existing ones or add additional values. A good source for material definitions are textbooks or the www.matweb.com database. 2013 Juergen Riegel Edit: This is work in progress. Please verify the material properties before use. Please use the provided TEMPLATE.FCMat file to create new materials.