FOREWARD The final report for the DOE Grant DE-FC36-00 IDI13975 consists of five volumes. The volumes provide in depth information on Cast Duplex and Cast Super Duplex Stainless Steels. Volume 1 is entitled "Metallurgical Evaluation of Cast Duplex Stainless Steels and their Weldments" involves comparison of selected grades of Duplex Stainless Steels and their welds with their wrought counterparts regarding corrosion performance, mechanical properties and weldability. Volume 2 entitled "The

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... opment of Qualification Standards for Cast Duplex Stainless Steel" involves interlaboratory testing and Volume 3 "The Development of Qualification Standards for Cast Super Duplex Stainless Steel" provides information on the testing of Super Duplex Stainless Steels to ASTM A923. Volume 4 is the "Guidance Document for the Evaluation of Super Duplex Stainless Steel" and involves the applicability of ASTM A923 to the Cast Super Duplex materials. Volume 5 is the data package for the incorporation of ASTM A890-5A material into the ASTM A923. In volume 1 selected grades of Duplex Stainless Steel castings and their welds, in comparison with their wrought counterparts, were evaluated, regarding corrosion performance, mechanical properties and weldability. Multiple heats of cast duplex stainless steel were evaluated in the as-cast, solution annealed static cast and solution annealed centrifugal cast conditions, while their wrought counterparts were characterized in the solution annealed condition and in the form of as-rolled plate. Welding, including extensive assessment of autogenous welds and a preliminary study of composite welds,