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.IMPAX WELD COATED ELECTRODE and IMPAX TIG-WELD TIG FILLER ROD give a deposited weld metal almost identical in composition to IMPAX SUPREME parent metal. Both the electrode and the filler rod are also suitable for welding standard AISI P20 tool steel grades and Uddeholm Holder grades.