Aluminium alloy for lithographic sheet

摘要

A lithographic sheet obtainable by a method not including an interannealing step is disclosed. The sheet is formed from an alloy having a composition in wt%:
Mg 0.05 to 0.30
Mn 0.05 to 0.25
Fe 0.11 to 0.40
Si up to 0.25
Ti up to 0.03
B up to 0.01
Cu up to 0.01
Cr up to 0.03
Zn up to 0.15
Unavoidable impurities up to 0.05 each, 0.15 total,
Al balance.
Also disclosed is the alloy with a composition as above and a method for forming the lithographic sheet.