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.LSS H10 Mod. is a hot-work tool steel with resistance to temperature softening and thermal fatigue. It is a modification of LSS H10 with the addition of 2% Co.