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.CARPENTER STAINLESS TYPE 303Se is a free-machining modification of the 18% chromium-8% nickel stainless steel. Type 303Se is used for all types of screw-machine products. This alloy is frequently used for machined parts which will be subjected to some cold forming in assembly operations.