Metal treatment – Stock – Ferrous
Reexamination Certificate
2003-06-02
2010-10-05
Yee, Deborah (Department: 1793)
Metal treatment
Stock
Ferrous
C148S608000, C148S653000, C420S068000, C420S069000, C420S062000
Reexamination Certificate
active
07806993
ABSTRACT:
The present invention provides a ferritic stainless steel that has excellent strength at high temperature, oxidation resistance at high temperature, and salt corrosion resistance at high temperature and that can be used under high temperatures exceeding 900° C., and a method of producing the same.Specifically, the composition thereof is adjusted, on a % by mass basis, so as to includeC: 0.02% or less;Si: 2.0% or less;Mn: 2.0% or less;Cr: from 12.0 to 40.0%;Mo: from 1.0 to 5.0%;W: more than 2.0% and 5.0% or less;wherein the total content of Mo and W: (Mo+W)≧4.3%,Nb: from 5 (C+N) to 1.0%,N: 0.02% or less, andFe and inevitable impurities as residual.
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Machine-English translation of Japanese patent 2002-146484, Tetsuor Kariya et al., May 22, 2002.
Machine-English translation of Korean patent 2001061570, H. Kim et al., Jul. 7, 2001.
English abstract of Korean patent 2001061570, H. Kim et al., Jul. 7, 2001.
Furukimi Osamu
Miyazaki Atsushi
Takao Kenji
DLA Piper (LLP) US
JFE Steel Corporation
Yee Deborah
LandOfFree
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