[MatWeb] (http://www.matweb.com)
MatWeb is an online material database contains a wide range of materials based on its properties. The database has information of 105,000 metals, plastics, ceramics, and composites. No registration is required in this website.
The pages lets user to search materials not only based on a property range or composition range but also based on manufacturer name, trade name or materials categories.
The page also provide a [tool] (http://www.matweb.com/tools/tools.aspx) to convert units, calculate weights and moments of inertia, convert hardness values for metals and plastics. In addition, there is another tool named engineering glossary which contains over 700 definitions of materials terms in convenient alphabetical lists. This feature helps to narrow searching. The tool section is only available for registered and premium users. However, registration on this page only requires nothing more than a valid email addressand after that the page allows you to use tools to compare