| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy plate for use as a lithographic printing plate having an improved uniformity of a surface roughened by electrolytic etching and wherein streaking does not occur. SOLUTION: The present invention is characterized by comprising, by wt%, Fe: 0.1 to 0.6%; Si: 0.02 to 0.2%; Cu: 0.001 to 0.02%; Zn: 0.01 to 0.1%; Mg: 0.005 to 0.1%; Ti: 0.001 to 0.05%, and the remainder Al, and an average value of the crystal particle size is 60μor less in a direction perpendicular to the rolling direction. The contents of Cu, Fe, Zn and Mg satisfy relational inequality of 0.15≥Zn+Mg-(Fe/10)-Cu, and in the composition of intermetallic compound particles with a particle size of≥0.1μm, provided that the number of metastable phase particles with an Fe/Al ratio of≤0.6 is defined as C and the number of all the intermetallic compound particles is defined as B, the value of C/B is≥0.35. COPYRIGHT: (C)2006,JPO&NCIPI
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