David Matthew Colburn

US Patent:

20110293466, Dec 1, 2011

Filed:

Jun 16, 2011

Appl. No.:

13/161563

Inventors:

JOHN P. FOSTER - Bluffton SC, US
David COLBURN - Ogden UT, US
Robert COMSTOCK - Irwin PA, US
Terrence COOK - Riverdale UT, US
Mats DAHLBACK - Vasteras, SE
Anand GARDE - Columbia SC, US
Pascal JOURDAIN - Vasteras, SE
Ronald KESTERSON - Columbia SC, US
Michael MCCLARREN - New Alexandria PA, US
Dianna Lynn SVEC NUHFER - Pittsburgh PA, US
Guirong PAN - Sumter SC, US
Jonna Partezana MUNDORFF - Finleyville PA, US
Hsiang Ken YUEH - Charlotte NC, US
James BOSHERS - Marshville NC, US
Penney FILE - Lusby MD, US
Bethany Boshers - , US

Assignee:

WESTINGHOUSE ELECTRIC COMPANY LLC - Cranberry Township PA

International Classification:

C22C 16/00

US Classification:

420423, 420422

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 0.6 weight percent iron, and optionally additional alloy elements selected from the group consisting of tin, chromium, copper, vanadium, and nickel with the balance at least 97 weight percent zirconium, including impurities, where a necessary final heat treatment includes one of i) a SRA or PRXA (15-20% RXA) final heat treatment, or ii) a PRXA (80-95% RXA) or RXA final heat treatment.