Patent ID: 6528183
Filing Date: 2003-03-04
Classification: B32B,C22C,Y10S,Y10T

Abstract:
Clad sheet comprising a core sheet and a cladding layer on one or two core sheetsurfaces, the core sheet comprising an alloy consisting essentially of (% by weight): Si: 0.7-1.3, Mg: 0.6-1.2, Cu: 0.5-1.1, Mn: 0.15-1.0, Zn<0.5, Fe<0.5, Zr<0.2, Cr<0.25, other elements<0.05 each and <0.15 total, the remainder aluminum, and the cladding comprising an aluminum alloy having a thickness of between 1 and 15% of the clad sheet thickness, wherein the cladding comprises an AlZn alloy consisting essentially of (% by weight): Zn: 0.25-0.7, Fe<0.40, Si<0.40, Cu, Mn, Mg, V or Ti<0.10, other elements <0.05 each and 0.15 total.