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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.

CRUCIBLE 309 is a non-hardenable austenitic chromium-nickel steel that has high heat-resisting characteristics. In the annealed condition it is non-magnetic or magnetic, depending on the composition. When cold worked it is very slightly magnetic. Typical applications include aircraft heaters and sulfite liquor handling equipment.