Abstract
INCOLOY1 alloy 800H tubing clad with INCONEL1 alloy 671 was installed in a power generating station in 1967 and 1968. Sections of these tubes were removed periodically for metallurgical evaluation. The last section of tubing removed had been exposed for over 17 years in a boiler reheater section operating at 1005° F (540° C) and at a steam pressure of 475–500 psig (3.28–3.45 MPa). The alloy 800H provides water side corrosion resistance and the needed high temperature strength while the high chromium alloy 671 has good resistance to coal ash fire side corrosion. This paper describes the mechanical properties, microstructural stability, and the water side corrosion resistance of alloy 800H after 17 years of exposure. A brief summary of the performance of the cladding is also included.
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References
M.A. Cordovi, “Historical Development of alloy 800: An Overview,” in Status Review of Alloy 800, S.F. Pugh (ed.), Proceedings of a British Nuclear Energy Society Conference at the University of Reading, September 25–26, 1974. (1975) pp. 1–13.
M.A. Cordovi, “Existing Potential Applications for Alloy 800”, in Alloy 800, W. Betteridge, R. Krefeld, H. Krockel, S.J. Lloyd, M. Van de Voorde, and C. Vivante (eds.), Proceedings of Petten International Conference, Petten, Netherlands, March 14–16, 1978. North-Holland Publishing Company, Amsterdam (1978) pp. 3–21.
C.S. Tassen, J.A. Harris, and P. Ganesan, Paper No 448,Corrosion ’87, NACE Houston, Texas (1987).
D.W. Rahoi, Controlling Fuel-Ash Corrosion with Nickel Alloys,Metals Engineering Quarterly, Vol 14, No 1 (1974) pp. 44–51.
C.S. Giggins and F.S. Pettit,Oxidation of Metals, Vol. 14 (1980) pp. 363–413.
J. Stringer, A. Minchener, and D.M. Lloyd, Paper No. 39,Corrosion ’83, NACE, Houston, Texas (1983).
B. Hallstedt, P. Wilhelmsson, and S. Bernhandsson, Paper No. 95,Corrosion ’86, NACE, Houston, Texas (1986).
Huntington Alloys Handbook, Technical Publication, Inco Alloys International, Inc., Huntington, West Virginia (1973).
INCOLOY alloys 800, 800H, and 801, Technical Publication T-40, Inco Alloys International, Inc., Huntington, West Virginia (1973).
C.S. Tassen and W.G. Lipscomb, Paper No. 379, NACECorrosion ’86, NACE, Houston, Texas (1986).
W.L. Mankins and D.E. Wenschhof,ASTM Special Technical Publication 672 (1979) pp. 616–32.
G.E. Moeller and C.W. Warren, Paper No. 237,Corrosion ’81, NACE, Houston, Texas (1981).
D.W. Rahoi, Paper No. 79,Corrosion ’79, NACE, Houston, Texas (1979).
J.P. Morse, R.W. Guenther, and L.G. Coffee, unpublished research, Inco Alloys International, Inc., Huntington, West Virginia.
R. Cozar and M. Rouby, “The Influence of Microstructure (Gamma Prime and Other Phases) on the Mechanical Properties of Alloy 800,” in Alloy 800, W. Betteridge, R. Krefeld, H. Krockel, S.J. Lloyd, M. Van de Voorde, and C. Vivante (eds.), Proceedings of Petten International Conference, Petten, Netherlands, March 14–16, 1978. North-Holland Publishing Company, Amsterdam (1978) pp. 77–87.
P.G. Stone, J. Orr, and J.C. Guest,J. British Nuclear Energy Society, Vol 14, (1975) pp. 25–34.
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Ganesan, P., Tassen, C.S. A metallurgical evaluation of clad alloy 800H tubing after 17 years of service in a coal fired utility boiler. J. Mater. Eng. 10, 171–180 (1988). https://doi.org/10.1007/BF02834160
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DOI: https://doi.org/10.1007/BF02834160