Abstract: Provided are a non-heat-treated aluminum alloy which has excellent casting properties and is high in both strength and toughness, and an aluminum alloy die casting material which is high in both strength and toughness, and which, in addition to having minimal difference in characteristics between regions thereof, is not prone to be affected by aging. An aluminum alloy comprises Si: 5.0 to 12.0% by mass, Mn: 0.3 to 1.9% by mass, Cr: 0.01 to 1.00% by mass, Ca: 0.001 to 0.050% by mass, with the balance being Al and unavoidable impurities, and the content of Mg in the unavoidable impurities being less than 0.3% by mass.

Abstract: The present invention provides a non-heat-treatable aluminum alloy for die casting, which can exhibit good castability and is able to confer excellent tensile characteristics (0.2% proof stress and elongation) and excellent corrosion resistance on die cast aluminum alloy materials. Also, the present invention provides a die cast aluminum alloy material having excellent tensile characteristics (0.2% proof stress and elongation) and excellent corrosion resistance. An aluminum alloy for die casting of the present invention comprises Mg: 3.7 to 9.0% by mass and Mn: 0.8 to 1.7% by mass, with the balance being Al and unavoidable impurities. It is preferable that the Mn content is 0.9 to 1.7% by mass and the Mg content is 4.7 to 9.0% by mass.

Abstract: A support frame for a pellicle includes a frame body made of an aluminum alloy. The frame body has: a top surface onto which a pellicle film is bonded; and an underside surface onto which a transparent substrate is bonded. A material of which the frame body is made has a Young's modulus larger than that of which the transparent substrate is made. The structure described above makes it possible to reduce deformation of the transparent substrate.

Abstract: A support frame for a pellicle includes a frame body made of an aluminum alloy. The frame body has: a top surface onto which a pellicle film is bonded; and an underside surface onto which a transparent substrate is bonded. A material of which the frame body is made has a Young's modulus larger than that of which the transparent substrate is made. The structure described above makes it possible to reduce deformation of the transparent substrate.

Abstract: A manufacturing method of an inexpensive aluminum alloy that allows fine crystallization of the Al—Fe—Si compound and primary Si by employing a convenient and efficient means. To a molten aluminum alloy including 8 to 20% by mass of Si; 0.5 to 4% by mass of Fe; and, as necessary, at least any one of Mn and Cr; at least any one of Ni, Cu, and Mg; P; and the balance being Al and impurities, AlB2, which is present as a solid phase in molten metal upon crystallization of the Al—Fe—Si compound, is added in such an amount that B is in a range of 0.01 to 0.5% by mass with respect to entire molten aluminum alloy. As the AlB2, an Al—B alloy which includes B as the AlB2 may be used.

Abstract: A method of production of inexpensive aluminum alloy is provided which enables precipitation of fine particles of Al—Fe—Si-based compounds and primary crystal Si to an aluminum alloy melt which is comprised of Si: 10 to 20 mass %, Fe: 0.5 to 4 mass %, P: 0.003 to 0.02 mass %, and further, if necessary, one or more of Mn, Ni, and Cr or furthermore, if necessary, one or more of Mg, Ti, Cr, Zr, and V, and has a balance of Al and unavoidable impurities. To the melt is added 0.01 to 1 mass %, in terms of silicide, of a substance, which includes fine particles of a metal silicide which are present as a solid phase in the melt, when the Al—Fe—Si-based compound is crystallized.

Abstract: A manufacturing method of an inexpensive aluminum alloy that allows fine crystallization of the Al—Fe—Si compound and primary Si by employing a convenient and efficient means. To a molten aluminum alloy including 8 to 20% by mass of Si; 0.5 to 4% by mass of Fe; and, as necessary, at least any one of Mn and Cr; at least any one of Ni, Cu, and Mg; P; and the balance being Al and impurities, AlB2, which is present as a solid phase in molten metal upon crystallization of the Al—Fe—Si compound, is added in such an amount that B is in a range of 0.01 to 0.5% by mass with respect to entire molten aluminum alloy. As the AlB2, an Al—B alloy which includes B as the AlB2 may be used.

Abstract: A method of production of inexpensive aluminum alloy is provided which enables precipitation of fine particles of Al—Fe—Si-based compounds and primary crystal Si to an aluminum alloy melt which is comprised of Si: 10 to 20 mass %, Fe: 0.5 to 4 mass %, P: 0.003 to 0.02 mass %, and further, if necessary, one or more of Mn, Ni, and Cr or furthermore, if necessary, one or more of Mg, Ti, Cr, Zr, and V, and has a balance of Al and unavoidable impurities. To the melt is added 0.01 to 1 mass %, in terms of silicide, of a substance, which includes fine particles of a metal silicide which are present as a solid phase in the melt, when the Al—Fe—Si-based compound is crystallized.

Abstract: An aluminum alloy casting having high electric resistance, high toughness and high corrosion resistance and optimally usable in manufacturing of electric motor housings, and a method of manufacturing said aluminum alloy casting are provided. The aluminum alloy casting has a composition including Si: 11.0-13.0 mass %, Fe: 0.2-1.0 mass %, Mn: 0.2-2.2 mass %, Mg: 0.7-1.3 mass %, Cr: 0.5-1.3 mass % and Ti: 0.1-0.5 mass %, with the balance consisting of Al and unavoidable impurities, wherein the content of Cu as an unavoidable impurity is limited to 0.2 mass % or less. In some cases, heat treatments such as solution heat treatment or artificial aging hardening treatment are performed after casting.