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.COLMONOY NO. 84 contains tungsten to harden the matrix and provide for good hard-facing. It is a nickel alternative to cobalt surfacing alloys, for service temperatures up to 1500 F. Boron and Silicon content provide better weldability at lower application temperatures.