Data sheets for over 180,000 metals, plastics, ceramics, and composites. MatWeb, Your Source for Materials Information What is MatWeb? MatWeb's searchable database of material properties includes data sheets of thermoplastic and thermoset polymers such as ABS, nylon, polycarbonate, polyester, polyethylene and polypropylene; metals such as aluminum, cobalt, copper, lead, magnesium, nickel, steel, s