Abstract: An aluminum alloy casting material for heat conducting is provided, wherein the thermal conductivity is improved of an aluminum alloy casting material whereof the castability is improved by the addition of silicon where said invention is characterized by being an aluminum alloy casting material with excellent thermal conductivity, comprising 5-10.0% by mass of silicon, 0.1-0.5% by mass of magnesium and the remainder comprising aluminum and inevitable impurities, and whereon aging treatment has been performed.

Abstract: An aluminum alloy casting material for heat conducting is provided, wherein the thermal conductivity is improved of an aluminum alloy casting material whereof the castability is improved by the addition of silicon where said invention is characterized by being an aluminum alloy casting material with excellent thermal conductivity, comprising 5-10.0% by mass of silicon, 0.1-0.5% by mass of magnesium and the remainder comprising aluminum and inevitable impurities, and whereon aging treatment has been performed.

Abstract: An aluminum alloy casting material for heat conduction obtained by adding Si to an aluminum alloy casting material with enhanced castability thereby realize enhancement of thermal conductivity. There is provided an aluminum alloy casting material excelling in heat conduction. characterized in that it comprises 5 to 10.0 mass % of Si, 0.1 to 0.5 mass % of Mg and the balance of Al and unavoidable impurities, the aluminum alloy casting material having undergone an aging treatment. Further, there is provided a cast aluminum alloy casting material that while having castability and mechanical strength equivalent to or higher than those of conventional cast aluminum alloys, is also enhanced in heat conduction; and provided a process for producing the cast aluminum alloy. In particular, there are provided a cast aluminum alloy and process for producing the same, wherein Si is contained in an amount of 6.0 to 8.0 mass %, the elements other than Si and Al each in simple form in an amount of ?0.

Abstract: An aluminum alloy foil is formed from an alloy containing about 1.2 to 1.7% by weight Fe and about 0.35 to 0.80% by weight Si, with the balance aluminum and incidental impurities. The alloy is continuously strip cast to form a strip having a thickness less than about 25 mm, which is then cold rolled to interanneal gauge and interannealed at a temperature of at least 400° C. The interannealed strip is cold rolled and further annealed to form the final foil product, having excellent rollability combined with high strength of the final foil.

Abstract: An aluminum alloy foil is formed from an alloy containing about 1.2 to 1.7% by weight Fe and about 0.35 to 0.80% by weight Si, with the balance aluminum and incidental impurities. The alloy is continuously strip cast to form a strip having a thickness less than about 25 mm, which is then cold rolled to interanneal gauge and interannealed at a temperature of at least 400° C. The interannealed strip is cold rolled and further annealed to form the final foil product, having excellent rollability combined with high strength of the final foil.

Abstract: A continuous-cast and cold-rolled aluminum alloy sheet for a cross fin, characterized by a chemical composition consisting of not less than 0.05 wt % and less than 0.30 wt % Fe, more than 0.03 wt % and less than 0.10 wt % Mn, an amount of a grain refining agent, and the balance of Al and unavoidable impurities including less than 0.15 wt % Si; a microstructure substantially composed of subgrains; and an electrical conductivity of 55% IACS or more. The aluminum alloy sheet is advantageously produced by a process including the steps of continuous-casting an aluminum alloy melt having the above-mentioned chemical composition to form a cast sheet having a sheet thickness of not more than 30 mm; cold-rolling the cast sheet at a reduction of 90% or more, followed by a temper annealing at a temperature of from 250 to 300.degree. C. for a holding time of 2 hours or more.