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.PYROMET X-15 is a low-carbon, martensitic alloy which can be age hardened to give high strength with excellent ductility and notch toughness from room temperature to 1050 F.