Casting aluminum alloy, aluminum alloy casting product and method for producing aluminum alloy casting product

摘要

PROBLEM TO BE SOLVED: To provide an aluminum alloy for casting capable of being used as cast without a heat treatment, an aluminum alloy cast product and a manufacturing method thereof.SOLUTION: There are provided an aluminum alloy for casting containing, by mass%, Mg:5.0 to 8.0%, Mn:0.5 to 2.0% and at least one kind of Ti:0.05 to 0.25%, B:0.05 to 0.15%, Zr:0.05 to 0.25% and the balance aluminum with inevitable impurities, and a manufacturing method therefor. There is provided an aluminum alloy for casting further containing Si:0.15 mass% or less and Fe:0.25 mass% or less. There is provided an aluminum cast product preferably having average particle diameter of crystallized article consisting of an Al-Mg-based crystallized article and an Al-Mn-based crystallized article of 30 μm or less and area percentage of 5% or less, bearing fore of 150 MPa or more and elongation of 20% or more.SELECTED DRAWING: None