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.Marker G-4857M is a 25 Chromium - 37 Nickel - Molybdenum alloy with good creep rupture strength and good resistance to carburization. and oxidation. The alloy is used as tubes and castings for reformer and pyrolysis furnaces. It can be used to 1100 C (2000 F) in air or combustion gases.