Patent ID: 8226781
Filing Date: 2012-07-24
Classification: F28F

Abstract:
1. A heat exchanger use thermally conductive, erosion resistant, sag resistant, self-corrosion resistant high strength aluminum alloy fin material having sacrificial anodization effect, comprising Si: 0.8 to 1.4 wt %, Fe: 0.45 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, limiting the Cu as an impurity to 0.02 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 1800 μm or more.