Alloy 803 was developed for applications as straight and twisted ID finned tubing in the petrochemical and chemical process industries, such aa ethylene pyrolysis, that require enhanced resistance to oxidation and carburization in addition to adequate stress rupture strength. This paper presents the mechanical properties characterized for the alloy produced in other forms, such as plate, sheet and bar products, for applications in the heat treatment, chemical and petrochemical industries. The mechanical properties covered include room and high temperature tensile teat results, impact strength, creep and stress rupture data for temperatures up to 2000° F (1093°C) at various stress levels. The preliminary results of the room and high temperature tensile and impact properties after long term exposures at intermediate temperatures are also presented. In addition to mechanical properties, the corrosion performance of alloy 803 in oxidation, sulfidation and carburization environments are presented.
Keywords: Alloy 803, stress rupture strength, creep strength, impact strength, oxidation, sulfidation, carburization.