METHOD FOR MANUFACTURING A THIN SHEET FOR PRODUCING CANNING COMPONENTS

摘要

A method for roll casting an aluminium alloy sheet to produce components for canning foodstuffs. Said aluminium alloy contains 1-4 wt % Mg and 0-1.6 wt % Mn. The method is characterised in that said sheet is produced by casting the liquid alloy between two rolls into a strip no more than 4 mm thick, performing at least one heat treatment at 400-580 DEG C to at least partially recrystallise the sheet, and cold rolling the sheet until it is less than 0.3 mm thick. The resulting sheet has an improved yield strength, formability index and coating delamination resistance such that it is suitable for use as a canning material, particularly for can lids.