Abstract: An aluminum alloy clad material includes a core material that is made of an aluminum alloy containing Mg at a concentration of 0.2 to 2.0% (mass %; the same applies below), with the balance being Al and unavoidable impurities, and has one side or two sides cladded with a surface-layer material made of pure aluminum containing Mg having a limited concentration of lower than 0.1%. In addition, an aluminum alloy clad material includes a core material that is made of aluminum or an aluminum alloy, and has one side or two sides cladded with a surface-layer material made of pure aluminum containing Mg having a limited concentration of lower than 0.1%, via an interlayer material made of an aluminum alloy containing Mg at a concentration of 0.3 to 2.0%, with the balance being Al and unavoidable impurities.

Abstract: A corrosion resistant copper tube which can exhibit a further improved resistance to ant nest corrosion, and which is suitably usable as a heat transfer tube and refrigerant tube in air-conditioning equipment and refrigerating equipment. The copper tube is formed of a copper material consisting of 0.15-0.6% by weight of phosphorus and the balance being copper and impurities, and has electric conductivity (Y1 or Y2: % IACS) which satisfies 50-75X?Y1?60-75X in the case where the tube includes a recrystallized structure, or 47-75X?Y2?57-75X in the case where the tube includes a deformation structure, wherein X (% by weight) represents a content of phosphorus.

Abstract: An aluminum alloy clad material includes a core material, an inner cladding material, and a sacrificial anode material, one side of the core material being clad with the inner cladding material, the other side of the core material being clad with the sacrificial anode material, the core material being formed of an Al—Mn alloy that includes 0.6 to 2.0 mass % of Mn and 0.4 mass % or less of Cu, with the balance being aluminum and unavoidable impurities, the inner cladding material being formed of an Al—Mn—Cu alloy that includes 0.6 to 2.0 mass % of Mn and 0.2 to 1.5 mass % of Cu, with the balance being aluminum and unavoidable impurities, and the sacrificial anode material being formed of an Al—Zn alloy that includes 0.5 to 10.0 mass % of Zn, with the balance being aluminum and unavoidable impurities.

Abstract: Provided are an Al alloy sheet having excellent characteristics for use as a can body, and a method for manufacturing the Al alloy sheet. A sheet having an Al alloy comprising a predetermined alloy composition as the material thereof, wherein an Al alloy sheet for a can body is configured so that the solid solution Mn content thereof after hot rolling is 0.25 mass % or greater, the solid solution Fe content is 0.02 mass % or greater, and the solid solution Si content is 0.07 mass % or greater, the electrical conductivity thereof is 30.0-40.0% IACS, the tensile strength in the rolling direction of a cold-rolled sheet thereof is 280-320 MPa, the tensile strength in the rolling direction after heat treatment at 205° C. for 10 minutes is 270-310 MPa, and the difference between the tensile strength in the rolling direction and the yield stress in the rolling direction after heat treatment at 205° C. for 10 minutes is 50 MPa or less.

Abstract: [Problem to be Solved] To provide a fin material made of an aluminum alloy for heat exchangers with no fin buckling deformation and having excellent buckling resistance in a temperature range of 400° C. to 580° C. before a filler alloy melts at the time of brazing. [Solution] The fin material made of an aluminum alloy for heat exchangers contains 1.0 to 2.0 mass % of Mn, 0.7 to 1.4 mass % of Si, and 0.05 to 0.3 mass % of Fe, with the balance being Al and unavoidable impurities, in which a number density of intermetallic compounds having a circle-equivalent diameter of 0.025 to 0.4 ?m is 3.0×106 particles/mm2 or more, and an amount of solid solution of Mn is 0.3 mass % or less.

Abstract: A fin material made of an aluminum alloy for heat exchangers contains 1.0 to 2.0 mass % of Mn, 0.7 to 1.4 mass % of Si, and 0.05 to 0.3 mass % of Fe, and one or more kinds of 0.05 to 0.3 mass % of Zr, 0.05 to 0.3 mass % of Cr, and 0.05 to 0.3 mass % of V, with the balance being Al and unavoidable impurities, in which a number density of intermetallic compounds having a circle-equivalent diameter of 0.025 to 0.4 ?m before braze-heating is 3.0×106 particles/mm2 or more, an amount of solid solution of Mn is 0.3 mass % or less and a respective amount of solid solution of Zr, Cr, and V is 0.1 mass % or less, and a recrystallization completion temperature during a temperature rise at the time of braze-heating is 450° C. or less.

Abstract: A heat-exchanger heat sink (1; 102; 103; 104) includes a plurality of fin plates (2; 202; 203; 203a, 203b; 205), which are lined up spaced apart from one another in a plate-thickness direction; and at least one linking part (3; 3a, 3b; 304), which is disposed such that it intersects and hold the plurality of fin plates (2). The at least one linking part has a base (31), which may be rod or bar shaped, and a plurality of positioning protrusions (32), which protrude from a side surface of the base. Each of the fin plates has at least one latching groove (21, 26), into which the base is inserted such that each fin plate is located between adjacent positioning protrusions of the at least one linking part.

Abstract: An aluminum alloy foil for an electrode current collectors has a high post-drying strength after application of an active material while keeping a high electrical conductivity. The aluminum alloy foil includes 0.1 to 1.0 mass % of Fe, 0.01 to 0.5% of Si, and 0.01 to 0.2 mass % of Cu, and the rest includes Al and unavoidable impurities. The aluminum alloy foil after final cold rolling has a tensile strength of 220 MPa or higher, a 0.2% yield strength of 180 MPa or higher, and an electrical conductivity of 58% IACS or higher. The aluminum alloy foil has a tensile strength of 190 MPa or higher and a 0.2% yield strength of 160 MPa or higher after the aluminum alloy foil is heat treated at any of 120° C. for 24 hours, 140° C. for 3 hours, and 160° C. for 15 minutes.

Abstract: An aluminum alloy brazing sheet used for brazing aluminum, without using a flux, in an inert gas atmosphere or vacuum is formed by arranging a brazing material on one side or both sides of a core material made of pure aluminum or aluminum alloy, the brazing material including 6% to 13% by mass of Si and the balance being Al and inevitable impurities, and performing cladding with an intermediate material interposed between the core material and the brazing material, the intermediate material including 0.01% to 1.5% by mass of Bi, 1.5% to 13% by mass of Si, and the balance being Al and inevitable impurities, the intermediate material having a thickness of 2% to 35% of a thickness of the brazing material, wherein one or both of the intermediate material and the core material includes 0.4% to 6% by mass of Mg.

Abstract: A brazing sheet used for brazing aluminum in an inert gas atmosphere or vacuum is formed by arranging a brazing material on one side or both sides of a core material made of pure aluminum or aluminum alloy, and performing cladding with an intermediate material interposed between the core material and the brazing material. The brazing material includes 6% to 13% of Si and the balance being Al and inevitable impurities. The intermediate material includes 0.01% to 1.5% of Bi, at least one of 0.05% or more of Li, 0.05% or more of Be, 0.05% or more of Ba, and 0.05% or more of Ca, and the balance being Al and inevitable impurities. By promptly supplying Bi and Li, Be, Ca, and/or Mg into the brazing material during brazing heating, these elements are eluted in the molten brazing material, embrittling the oxide film on the surface of the brazing material.

Abstract: Disclosed is an aluminum alloy material for a heat exchanger fin, the aluminum alloy material containing Si: 1.0% to 5.0% by mass, Fe: 0.1% to 2.0% by mass, and Mn: 0.1% to 2.0% by mass with balance being Al and inevitable impurities, wherein 250 pieces/mm2 or more to 7×104 pieces/mm2 or less of Si-based intermetallic compound particles having equivalent circle diameters of 0.5 to 5 ?m are present in a cross-section of the aluminum alloy material; and wherein 10 pieces/mm2 or more and 1000 pieces/mm2 or less of the Al—Fe—Mn—Si-based intermetallic compounds having equivalent circle diameters of more than 5 ?m are present in a cross-section of the aluminum alloy material. The aluminum alloy material may further contain one or more additive elements of Mg, Cu, Zn, In, Sn, Ti, V, Zr, Cr, Ni, Be, Sr, Bi, Na, and Ca.

Abstract: A method of joining heat-treatable aluminum alloy members by friction stir welding, including the steps of: a T4-treatment-performing step of performing a T4 treatment on heat-treatable aluminum alloy members so as to impart T4 temper to the heat-treatable aluminum alloy members; a joining step of joining the heat-treatable aluminum alloy members with T4 temper by friction stir welding to provide a joined product; and a reversion-treatment-performing step of performing a reversion treatment, the reversion-treatment-performing step being carried out prior to or after the joining step.

Abstract: An aluminum alloy cast impeller has a stable high-temperature strength (e.g., 0.2% proof stress value of 260 MPa or more) at about 200° C. A boss part, blade parts, and a disc part have secondary dendrite arm spacings of 20 to 50 ?m, 10 to 35 ?m, and 5 to 25 ?m, respectively, and satisfy the relationship Amax>Bmax>Cmax, where Amax, Bmax, and Cmax are the maximum values of the secondary dendrite arm spacings of the boss part, the blade parts, and the disc part, respectively. During casting, Al alloy molten metal is pressure injected into a 200 to 350° C. plaster mold. A 100 to 250° C. chill occurs on a surface in contact with an impeller disc surface, so that the chill temperature (° C.)<(plaster mold temperature?50° C.).

Abstract: The present invention provides: an aluminum alloy substrate for magnetic discs with excellent plating surface smoothness; a manufacturing method therefor; and a magnetic disc using said aluminum alloy substrate for magnetic discs. The present invention is an aluminum alloy substrate for magnetic discs, a manufacturing method therefor, and a magnetic disc using said aluminum alloy substrate for magnetic discs, the aluminum alloy substrate being characterized in being obtained from an aluminum alloy containing Mg: 2.0-8.0 mass % (“%” below), Be: 0.00001-0.00200%, Cu: 0.003-0.150%, Zn: 0.05-0.60%, Cr: 0.010-0.300%, Si: 0.060% or less, Fe: 0.060% or less, the balance being obtained from Al and unavoidable impurities.

Abstract: An aluminum alloy brazing sheet having a good brazing property that prevents diffusion of molten filler material in a core material of the aluminum alloy brazing sheet during a brazing process and which has a superior corrosion resistance to an exhaust gas condensate water after the brazing process is disclosed. A method of manufacturing of the aluminum alloy brazing sheet also is disclosed. A high corrosion-resistant heat exchanger that employs the aluminum alloy brazing sheet also is disclosed.

Abstract: In this flat extruded aluminum multi-port tube, the corrosion-resistance, at inner surfaces of a plurality of flow passages independently and parallelly extending in the tube axial direction, is effectively enhanced. In a flat extruded aluminum multi-port tube 10 formed by an extrusion by employing an aluminum tube material and an aluminum sacrificial anode material having an electrochemically lower potential than the aluminum tube material, the aluminum sacrificial anode material is exposed to form a sacrificial anode portion 18 at least in a part of an inner circumferential portion in each of the plurality of flow passages 12.

Abstract: A highly corrosion resistant and highly formable aluminum-alloy clad material, a method for producing the same, a heat exchanger using the same and a method for producing the same are shown. The present aluminum-alloy clad material has an aluminum alloy core material, an intermediate layer material clad on one surface of the core material and a brazing filler metal clad on the surface of the intermediate layer material that is not on the core material side, wherein a crystal grain size of the intermediate layer material before brazing heating is 60 ?m or more, and in a cross section of the core material in a rolling direction before brazing heating, when R1 (?m) represents the crystal grain size in a plate thickness direction, and R2 (?m) represents the crystal grain size in the rolling direction, R1/R2 is 0.30 or less.

Abstract: A highly corrosion resistant and highly formable cladded aluminum-alloy material, a method for producing the same, a heat exchanger using the same and a method for producing the same are shown. The present cladded aluminum-alloy material has an aluminum alloy core material, an intermediate layer material clad on one surface of the core material and a brazing filler metal clad on the intermediate layer material surface which is not at the core material side, wherein a crystal grain size of the intermediate layer material before brazing heating is 60 ?m or more, and in a cross section of the core material in a rolling direction before brazing heating, when R1 (?m) represents the crystal grain size in a plate thickness direction, and R2 (?m) represents the crystal grain size in the rolling direction, R1/R2 is 0.30 or less.

Abstract: An aluminum alloy foil for a current collector of an electrode is provided which has not only high electric conductivity but also high strength before and after a drying step, and is low in manufacturing cost. Provided is an aluminum alloy foil for a current collector of an electrode, containing 1.0 to 2.0 mass % (hereafter, simply referred to as “%”) of Fe, 0.01 to 0.2% of Si, 0.0001 to 0.2% of Cu, and 0.005 to 0.3% of Ti, the remainder being Al and inevitable impurities, wherein an amount of Fe contained as a solid solution is 300 ppm or more, and particles of intermetallic compounds having an equivalent circle diameter of 0.1 to 1.0 ?m exist at 1.0×105 particles/mm2 or more.

Abstract: A friction stir welding method which permits advantageous production of a product which has a sound welded area without joint defects, by joining together two members formed of the same material or respective different materials selected from a cast aluminum alloy and 2000 series, 4000 series, 5000 series and 7000 series aluminum alloys which are considered difficult to be joined together by the friction stir welding method. An initiation tab member formed of a 1000 series, 3000 series, 6000 series or 8000 series aluminum alloy is disposed in abutting contact with end faces of joining portions of first and second members (in an abutting part), on the side of initiation of the welding operation, and the friction stir welding operation is performed by moving a probe of a rotary tool through the initiation tab member into the joining portions of the two members.