Main motivation for starting the MATDAT.COM project was the idea to organize material data which I obtained from literature/experiments during work on my thesis, and to make them available to other members of the technical community and to help them save their time, money and effort. All material data included in the database are from relevant, well-documented sources (journal and conference articles, dissertations, technical reports, handbooks). As this information is already published, and since I wanted to make a contribution to the community, I have decided to keep basic access to ALL THE DATA in MATDAT.COM database COMPLETELY FREE to students and young researchers through MATDAT EDU option.