Abstract: Provided are: an Al—Mg—Si-based aluminum alloy material including an aluminum alloy including 0.10 to 1.50 mass % (hereinafter, “%”) Si and 0.10 to 2.00% of Mg, in which an oxide coating film mainly containing aluminum is formed on a surface of the aluminum alloy material, a Mg—Si-based crystallized product having an equivalent circle diameter of 0.1 to 5.0 ?m is contained at 100 to 150,000 particles/mm2, a Mg—Si-based crystallized product having an equivalent circle diameter of more than 5.0 ?m and 10.0 ?m or less is contained at 5 particles/mm2 or less, and the oxide coating film includes Si at a maximum concentration of 0.1 to 40.0% and Mg at a maximum concentration of 0.1 to 20.0%; a method for producing the aluminum alloy material; and an aluminum alloy clad material, in which the aluminum alloy material is clad on at least one surface of an aluminum core material.

Abstract: The aluminium-alloy brazing sheet fin material having a core material and a brazing material. Before heating for brazing, the fin material has an average degree of cladding of 6 to 16% for each surface, a thickness of 40 to 120 ?m and an electrical conductivity of 48 to 54% IACS and the core material has a metallographic structure having a distribution in which a Mn-based compound having an equivalent circular diameter of 0.05 to 0.50 ?m is present at an average distance between particles of 0.05 to 0.35 ?m. After heating for brazing, the fin material has an electrical conductivity of 40 to 44% IACS and the core material has a metallographic structure having a distribution in which a Mn-based compound having an equivalent circular diameter of 0.50 ?m or less is present at an average distance between particles of 0.45 ?m or less.

Abstract: Provided are an aluminum cladding material having excellent corrosion resistance, a production method therefor, an aluminum cladding material for heat exchangers having excellent corrosion resistance, a production method therefor, an aluminum heat exchanger using said aluminum cladding material for heat exchangers, and a production method therefor. Said aluminum cladding material comprises an aluminum alloy core material and a sacrificial anode material layer clad on at least one surface thereof. The sacrificial anode material layer comprises an aluminum alloy containing 0.10 mass % or more and less than 1.50 mass % Si, 0.10 to 2.00 mass % Mg. Present therein is 100 to 150000 pieces/mm2 of Mg—Si-based crystallized product having a circle-equivalent diameter of 0.1 to 5.0 ?m, 7 pieces/mm2 or less of Mg—Si-based crystallized product having a circle-equivalent diameter of more than 5.0 ?m and 10.0 ?m or less in the sacrificial anode material layer.

Abstract: An aluminum alloy brazing sheet for heat exchangers, having a core alloy containing Mn 0.6 to 2.0 mass %, Fe 0.05 to 0.5 mass %, Si 0.4 to 0.9 mass %, and Zn 0.02 to 4.0 mass %, with the balance being Al and unavoidable impurities; and as a skin alloy containing Si 6.0 to 13.0 mass %, Fe 0.05 to 0.80 mass %, and Cu 0.05 to 0.45 mass %, with the balance being Al and unavoidable impurities, wherein a ratio A/B of a number density A of specific precipitates with a particle size 0.1 ?m or more but less than 3.0 ?m, and a number density B of precipitates with a particle size 3.0 ?m or more in the core alloy, satisfies: 50?A/B?500, and wherein an average grain size of the core alloy in a longitudinal cross-section of a fin after braze-heating is 100 ?m or more; and a method of producing the same.

Abstract: This invention provides an aluminum alloy material capable of being thermally bonded in a single layer without using a bonding agent, such as a brazing or welding filler metal. This invention also provides a bonding method for the aluminum alloy material, and an aluminum bonded body using the aluminum alloy material. The aluminum alloy material is made of an aluminum alloy containing Si: 1.0 to 5.0 mass % and Fe: 0.01 to 2.0 mass % with the balance Al and inevitable impurities. The aluminum alloy material contains 10 to 1×104 pieces/?m3 of Al-based intermetallic compounds having equivalent circle diameters of 0.01 to 0.5 ?m and 200 pieces/mm2 or less of Si-based intermetallic compounds having equivalent circle diameters of 5.0 to 10 ?m.