... 1.0, 1 .2, 1.5, 2. 0, 2. 5, 3.0, 4.0, 5.0 and 6.0 mm.Most sheet is produced in non-heat-treatable material (1xxx, 3xxx,5xxx), and is supplied in a stated temper (such as ‘quarter-hard’, ‘half-hard’) ... applications, sheet is supplied in heat-treatablealloy (2xxx, 6xxx or 7xxx series), usually in the fully-heat-treated T 6- condition (quenched and artificially aged). 2. 2.4 Tolerance on thicknessThe ... length; and (b)distortion of the cross-section.Overall bow is got rid of by stretching, typically up to a strain of 1 or 2% . For spray or air-quenched material, and also for non-heat-treated,stretching...