Shall consist of new, clean, uncoated and unpainted aluminum scrap of one specified aluminum alloy with a minimum thickness of .015" (.38 mm) and to be free of hair wire, wire screen, dirt and other non-metallic items. Oil and grease not to total more than 1%. Also free from punchings less than 1/2" (1.27 cm) in size.
Shall consist of new, clean, uncoated and unpainted aluminum scrap with no more than 0.10% of each of the following materials: Cu, Zn, Sn, Pb and a maximum of 0.20% of Mg. and Mn. A minimum thickness of 0.2 mm. A preliminary agreement may authorise a percentage of punchings in delivery (small pieces of less than 10 mm x 10 mm x 0.2 mm).