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.INCOLOY ALLOY 908 is a nickel-iron alloy recently developed for applications in the advanced TOKAMAK reactor ITER. The alloy contains no cobalt, a small level of chromium to resist stress assisted grain boundary oxidation (SAGBO) and is stabilized with Cb(Nb), Ti, and Al.