View Sample Alloy Digest Data Sheet (PDF) Since 1952, Alloy Digest has been the leading reference for materials property data on metals and alloys used throughout the world. Featuring graphs, charts and tables, these sheets give facts and figures on composition or characterization, physical and mechanical properties, heat treatment, and machinability.Carlson Alloy C800 AT has superior creep and rupture strengths over long-term exposure to high temperatures and higher ASME boiler and pressure-vessel design stress allowables than C800 H. The alloy resists stress-corrosion cracking, resists sulfur attack, internal oxidation, scaling and corrosion in thermal processing and heat-transfer applications. The strength is obtained by a selective chemistry range within that of Alloy C800 H.