Alloys or metallic compositions – Ferrous – Nine percent or more chromium containing
Reexamination Certificate
2011-08-30
2011-08-30
Yee, Deborah (Department: 1733)
Alloys or metallic compositions
Ferrous
Nine percent or more chromium containing
C420S035000, C420S070000, C420S109000, C148S325000, C148S335000, C148S529000
Reexamination Certificate
active
08007715
ABSTRACT:
A steel has the following chemical composition (amounts in % by weight):0.05-0.14 C,8-13 Cr,1-2.6 Ni,0.5-1.9 Mo,0.5-1.5 Mn,0.15-0.5 Si,0.2-0.4 V,0-0.04 B,2.1-4.0 Re,0-0.07 Ta,0-60 ppm Pd,remainder Fe and unavoidable impurities.The steel can be used effectively as a welding additive material and has outstanding properties at very high temperatures, in particular a good creep rupture strength/resistance and a good oxidation resistance.
REFERENCES:
patent: 5779821 (1998-07-01), Ishii et al.
patent: 2010/0040502 (2010-02-01), Nazmy et al.
patent: 0976844 (2000-02-01), None
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Lieferanweisung fuer Schweisszusatzwerkstoffe: Boehler SZW 3001-UP, 2001, 1 pg, ALSTOM (Schweiz) AG.
Search Report for Swiss Patent App. No. 00255/2009 (May 5, 2009).
Gerdes Paul Claus
Kuenzler Andreas
Nazmy Mohamed
ALSTOM Technology Ltd.
Cermak Adam J.
Cermak Nakajima LLP
Yee Deborah
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