High Cr ferritic/martensitic steels having an improved creep resistance for in-core component materials in nuclear reactor, and preparation method thereof
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United States of America Patent
Stats
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Mar 21, 2017
Grant Date -
May 3, 2012
app pub date -
Oct 25, 2011
filing date -
Oct 26, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Disclosed herein is a high Cr Ferritic/Martensitic steel comprising 0.04 to 0.13% by weight of carbon, 0.03 to 0.07% by weight of silicon, 0.40 to 0.50% by weight of manganese, 0.40 to 0.50% by weight of nickel, 8.5 to 9.5% by weight of chromium, 0.45 to 0.55% by weight of molybdenum, 0.10 to 0.25% by weight of vanadium, 0.02 to 0.10% by weight of tantalum, 0.21 to 0.25% by weight of niobium, 1.5 to 3.0% by weight of tungsten, 0.015 to 0.025% by weight of nitrogen, 0.01 to 0.02% by weight of boron and iron balance. By regulating the contents of alloying elements such as nitrogen, born, the high Cr Ferritic/Martensitic steel with superior tensile strength and creep resistance is provided, and can be effectively used as an in-core component material for sodium-cooled fast reactor (SFR).
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International Classification(s)
- 2011 Application Filing Year
- G21C Class
- 205 Applications Filed
- 171 Patents Issued To-Date
- 83.42 % Issued To-Date
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- 0 Citation Count
- G21C Class
- 0 % this patent is cited more than
- 8 Age
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