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.Columbium WC-103 is a columbium-base alloy having good high temperature strength, good weldability and fabricability. It is recommended for high performance rocket engine components for temperatures up to 2800 F for controlled periods of time.