ABSTRACT

The American system for designating wrought aluminium materials, administered by the Aluminum Association (AA) in Washington, is by now virtually standard worldwide [12]. For any given material, it employs a two-part reference number, e.g. 3103-H14, 6082-T6 or 5083-0. The four-figure number before the hyphen defines the alloy, and the symbols after it the condition (or temper) in which that alloy is supplied.