Inventors:
David Colburn - Columbia SC, US
Robert Comstock - Irwin PA, US
Terrence Cook - Riverdale UT, US
Mats Dahlback - Vasteras, SE
John Foster - Bluffton SC, US
Anand Garde - Columbia SC, US
Pascal Jourdain - Vasteras, SE
Ronald Kesterson - Columbia SC, US
Michael McClarren - New Alexandria PA, US
Lynn Nuhfer - Pittsburgh PA, US
Jonna Partezana - Pittsburgh PA, US
Kenneth Yueh - Columbia SC, US
James Boshers - Marshville NC, US
Penney File - Lusby MD, US
International Classification:
C22F 1/18
C22C 16/00
Abstract:
Articles, such as tubing or strips, which have excellent corrosion resistance to water or steam at elevated temperatures, are produced from alloys having 0.2 to 1.5 weight percent niobium, 0.01 to 0.45 weight percent iron, at least one additional alloy element selected from 0.02 to 0.8 weight percent tin, 0.05 to 0.5 weight percent chromium, 0.02 to 0.3 weight percent copper, 0.1 to 0.3 weight percent vanadium, 0.01 to 0.1 weight percent nickel, the balance at least 97 weight percent zirconium, including impurities, wherein the alloy may be fabricated from a process of forging the zirconium alloy into a material, beta quenching the material, forming the material by extruding or hot rolling the material, cold working the material with one or a multiplicity of cold working steps, wherein the cold working step includes cold reducing the material and annealing the material at an intermediate anneal temperature of 960-1105 F., and final working and annealing of the material. The articles formed also show improved weld corrosion resistance with the addition of chromium.