Patent ID: 8968882
Filing Date: 2015-03-03
Classification: B32B,C22C,C22F,Y10T

Abstract:
1. A formed automotive structural member having a flat hem made from an automotive body sheet consisting of a clad sheet product consisting of a core sheet having a cladding layer on one core sheet surface only, the core sheet is of an aluminium alloy selected from the group consisting of AA6016 and AA6111-series alloys and the cladding is of an AA6005A-series alloy having a Cu-content of less than 0.25 wt. % and the sum of Mn+Cr content is in a range of 0.1 to 0.50%, and wherein the core sheet has a composition different from the cladding sheet, wherein at least the core sheet is in a T4 temper or T4P temper, wherein the core sheet has a thickness in the range of 0.5 to 2 mm, wherein the cladding layer has a thickness in the range of 1 to 25% of the total thickness of the clad sheet product, wherein the body sheet has a hemming performance rating of at least 3.25.