Six new grade austenitic stainless steel tubes including SUPER304H® (C.C. 2328), TP347HFG, NF709®, TEMPALOY A-3®, HR3C® (TP310HCbN) and TEMPALOY CR30A® were selected and installed in the superheater of the Eddystone No.1 boiler for the purpose of extending tube service life by reducing fire-side and steam-side corrosion. No significant corrosion was observed on the outer surfaces at 75,075h of exposure. Precipitates due to exposure were identified by TEM-EDS analysis. The thickness of steam oxidation scale was less in high-Cr materials, and high Cr content was thus demonstrated to have effectively improved steam oxidation resistance. HR3C showed comparatively poor impact properties, while the other materials exhibited acceptable impact values of over 30J/cm2 at 20°C. All materials showed reduced creep strength compared with unexposed materials after service exposure under high stress test conditions. However the differences became smaller at lower stresses.
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ASME 2007 Pressure Vessels and Piping Conference
July 22–26, 2007
San Antonio, Texas, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
0-7918-4287-8
PROCEEDINGS PAPER
Field Test Results of Newly Developed Austenitic Steels in the Eddystone Unit No.1 Boiler
Nobuyoshi Komai,
Nobuyoshi Komai
Mitsubishi Heavy Industries, Ltd., Nagasaki, Nagasaki, Japan
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Masaaki Igarashi,
Masaaki Igarashi
Sumitomo Metal Industries, Ltd., Japan
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Hiroyuki Mimura,
Hiroyuki Mimura
Nippon Steel Corporation, Japan
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Fujitmitsu Masuyama,
Fujitmitsu Masuyama
Kyushu Institute of Technology, Japan
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Martin Prager,
Martin Prager
Materials Properties Council, NY
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Peter R. Boyles
Peter R. Boyles
Exelon Corporation, PA
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Nobuyoshi Komai
Mitsubishi Heavy Industries, Ltd., Nagasaki, Nagasaki, Japan
Masaaki Igarashi
Sumitomo Metal Industries, Ltd., Japan
Yusuke Minami
Tenaris NKK Tubes, Japan
Hiroyuki Mimura
Nippon Steel Corporation, Japan
Fujitmitsu Masuyama
Kyushu Institute of Technology, Japan
Martin Prager
Materials Properties Council, NY
Peter R. Boyles
Exelon Corporation, PA
Paper No:
CREEP2007-26760, pp. 203-209; 7 pages
Published Online:
August 20, 2009
Citation
Komai, N, Igarashi, M, Minami, Y, Mimura, H, Masuyama, F, Prager, M, & Boyles, PR. "Field Test Results of Newly Developed Austenitic Steels in the Eddystone Unit No.1 Boiler." Proceedings of the ASME 2007 Pressure Vessels and Piping Conference. Volume 9: Eighth International Conference on Creep and Fatigue at Elevated Temperatures. San Antonio, Texas, USA. July 22–26, 2007. pp. 203-209. ASME. https://doi.org/10.1115/CREEP2007-26760
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