| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy sheet for can-top having enough pressure resistance after filling beverage and excellent in rivet moldability and can opening property even with a thin wall with a thickness of about 0.2 mm.SOLUTION: There are provided a 5000 series aluminum alloy sheet containing Mg:3.8 to 5.5 mass%, Fe:0.10 to 0.50 mass%, Si:0.05 to 0.30 mass%, Mn:0.01 to 0.60 mass%, Cu:0.01 to 0.30 mass% and the balance Al with inevitable impurities and galling coating treated after cold rolling with intermediate annealing, which is an aluminum alloy sheet for can-top having enough pressure resistance after filling beverage and excellent in rivet moldability and can opening property even with a thin wall with a thickness of about 0.2 mm having a solid solution amount of Mg measured by a residual extraction method by a heated phenol of 80% or more of the Mg content and subgrain area percentage in a range of 10 to 90% as average as shown in Figure 1 as a structure of a sheet thickness center part.SELECTED DRAWING: Figure 1 |
