Metal treatment – Process of modifying or maintaining internal physical... – With casting or solidifying from melt
Reexamination Certificate
2011-08-16
2011-08-16
Silverman, Stanley (Department: 1736)
Metal treatment
Process of modifying or maintaining internal physical...
With casting or solidifying from melt
C148S552000, C148S696000
Reexamination Certificate
active
07998288
ABSTRACT:
A heat exchanger use high strength aluminum alloy fin material having a high strength and excellent in thermal conductivity, erosion resistance, sag resistance, sacrificial anodization effect, and self corrosion resistance, characterized by containing Si: 0.8 to 1.4 wt %, Fe: 0.15 to 0.7 wt %, Mn: 1.5 to 3.0 wt %, and Zn: 0.5 to 2.5 wt %, limiting the Mg as an impurity to 0.05 wt % or less, and having a balance of ordinary impurities and Al in chemical composition, having a metal structure before brazing of a fibrous crystal grain structure, a tensile strength before brazing of not more than 240 MPa, a tensile strength after brazing of not less than 150 MPa, and a recrystallized grain size after brazing of 500 μm or more.
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English language machine translation of JP2005-002383.
Kobe Steel Ltd., “Aluminum alloy sheet excellent in press formability and hem workability,” Publication Date: May 26, 2000; English Abstract of JP-2000 144294.
Mitsubishi Aluminum, “High strength aluminum alloy fin material for automotive heat exchanger having excellent rollability, and its manufacturing method,” Publication Date: Jun. 24, 2004; English Abstract of JP-2004 176091.
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Office Action for Corresponding Japanese Patent Application dated Feb. 16, 2011.
Nagasawa Masae
Oki Yoshito
Sasaki Tomohiro
Suzuki Hideki
Millen White Zelano & Branigan P.C.
Nippon Light Metal Company Ltd.
Silverman Stanley
Walck Brian
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