C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 21/10 (2006.01) B65D 1/12 (2006.01) C22F 1/053 (2006.01)
Patent
CA 2091355
2091355 9203586 PCTABS00011 Aluminium can stock which has strength, ductility and anisotropic properties in excess of conventional aluminium can stocks. The aluminium can stock is produced from an alloy with 3.0-8.0 wt% zinc, 0.5-3.0 wt% magnesium, less than 0.7 wt% iron, 0.01-2.0 wt% silicon, 0.05-0.9 wt% copper, 0.1-1.1 wt% manganese, less than 0.3 wt% chromium and incidental impurities less than 0.15 wt%. While zirconia is not generally an impurity in these aluminium alloys it is preferable that the amount present is less than 0.01 wt%. The aluminium can stock is produced by a process comprising the steps of forming melt of the alloy metal suitable for casting, casting the melt into a form suitable for rolling, performing an intermediate rolling to an intermediate thickness, treating the alloy material with heat, performing finish rolling by a cold rolling reduction within the range of 2 to 85 % and temper heat treating the material to the desired ductility and strength properties.
Comalco Aluminium Limited
Oyen Wiggs Green & Mutala
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