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.THYROTHERM 2344 EFS is an electric arc melted, vacuum degassed hot work tool steel with good resistance to thermal shock and the capability to be polished to lens quality.