| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide: an Al-Mg-Si series aluminum-alloy sheet for boiler drum having excellent formability and strength and low earing ratio, suitable for the boiler drum; a manufacturing method of the aluminum-alloy sheet; a boiler-drum resin-coated aluminum-alloy sheet having excellent formability and strength after coating-baking processing; and a manufacturing method of the aluminum-alloy sheet. <P>SOLUTION: The aluminum-alloy sheet for boiler drum is composed, by mass%, of >0.5% and ≤1.5% Si, 0.4-0.8% Mg, >0.8% and ≤1.2% Fe, 0.01-0.4% Cu, ≥0.01% and <0.1% Mn and the balance Al with inevitable impurities, and has 280-380 MPa tensile strength, 44.0-50.0% IACS electric conductivity, 2.0-4.5% area occupancy of intermetallic compound on the surface and -3 to +3% earing ratio. Then, the manufacturing method of the aluminum-alloy sheet is provided. <P>COPYRIGHT: (C)2013,JPO&INPIT |
