Abstract: An aluminum brazing sheet has a multilayer structure of two or more layers of at least a core material and a brazing material, wherein an Al—Si—Mg—Bi-based brazing material containing, by mass %, 0.01% to 2.0% of Mg, 1.5% to 14.0% of Si, and 0.005% to 1.5% of Bi is clad on one surface or both surfaces of the core material to be located at an outermost surface of the aluminum brazing sheet, in the Al—Si—Mg—Bi based brazing material, there are more than 10 Mg—Bi-based compounds having a diameter of 0.01 ?m or more and less than 5.0 ?m when observed in a surface layer plane direction and there are less than 2 Mg—Bi-based compounds having a diameter of 5.0 ?m or more, and in the brazing material, there are less than 5 Bi particles having a diameter of 5.0 ?m or more when observed in the surface layer plane direction.

Abstract: An aluminum alloy foil having a composition including, Fe of 1.0% by mass or more and 1.8% by mass or less, Si of 0.01% by mass or more and 0.08% by mass or less, Cu of 0.005% by mass or more and 0.05% by mass or less, Mn of 0.01% by mass or less, and Al. In a crystal orientation analysis per unit area by electron backscatter diffraction (EBSD), a ratio (HAGBs/LAGBs) of a length of high angle grain boundaries (HAGBs) having an orientation difference of 15° or more to a length of low angle grain boundaries (LAGBs) having an orientation difference of 2° or more and less than 15° is more than 2.0, and a Cu orientation density is 40 or less and an R orientation density is 30 or less as a texture.

Abstract: An aluminum alloy foil having a composition, including Fe: 1.2% by mass or more and 1.8% by mass or less, Si: 0.05% by mass or more and 0.15% by mass or less, Cu: 0.005% by mass or more and 0.10% by mass or less, and Mn: 0.01% by mass or less, with a remainder being Al and inevitable impurities. An average crystal grain size of the aluminum alloy foil is 20 to 30 ?m, a maximum crystal grain size/the average crystal grain size is ?3.0, a Cube orientation density is 5 or more, a Cu orientation density is 20 or less, and an R orientation density is 15 or less.

Abstract: An aluminum alloy foil having a composition including, Fe of 1.0% by mass or more and 1.8% by mass or less, Si of 0.01% by mass or more and 0.08% by mass or less, Cu of 0.005% by mass or more and 0.05% by mass or less, Mn of 0.01% by mass or less, and Al. In a crystal orientation analysis per unit area by electron backscatter diffraction (EBSD), a ratio (HAGBs/LAGBs) of a length of high angle grain boundaries (HAGBs) having an orientation difference of 15° or more to a length of low angle grain boundaries (LAGBs) having an orientation difference of 2° or more and less than 15° is more than 2.0, and a Cu orientation density is 40 or less and an R orientation density is 30 or less as a texture.

Abstract: An aluminum alloy foil having a composition, including Fe: 1.2% by mass or more and 1.8% by mass or less, Si: 0.05% by mass or more and 0.15% by mass or less, Cu: 0.005% by mass or more and 0.10% by mass or less, and Mn: 0.01% by mass or less, with a remainder being Al and inevitable impurities. An average crystal grain size of the aluminum alloy foil is 20 to 30 ?m, a maximum crystal grain size/the average crystal grain size is ?3.0, a Cube orientation density is 5 or more, a Cu orientation density is 20 or less, and an R orientation density is 15 or less.

Abstract: An aluminum brazing sheet for flux-free brazing having a multilayer structure of two or more layers including at least one core material layer and one brazing material layer, wherein the brazing material layer is positioned on one or both sides of the core material layer and on an outermost surface of the brazing sheet. The brazing material layer is made of an Al—Si—Mg—X brazing material containing: in mass%, 0.05 to 2.0% of Mg, and 2.0 to 14.0% of Si, and further containing one or more of 0.01 to 0.3% of Bi, Ga, Sn, In and Pb, a total amount of Bi, Ga, Sn, In and Pb being 0.5% or less. X indicates one or more of Bi, Ga, Sn, In and Pb.

Abstract: An aluminum alloy for flux-free brazing provided for brazing performed via an Al—Si-based brazing material without a flux in a non-oxidizing atmosphere without depressurization, includes: by mass %, 0.01% to 2.0% of Mg; and 0.005% to 1.5% of Bi, wherein in the aluminum alloy, there are more than 10 Mg—Bi-based compounds having a diameter of 0.01 ?m or more and less than 5.0 ?m in terms of equivalent circle diameter per 10,000-?m2 visual field and there are less than 2 Mg—Bi-based compounds having a diameter of 5.0 ?m or more per 10,000-?m2 visual field in a cross section parallel to a rolling direction, and in the aluminum alloy, there are less than 5 Bi particles having a diameter of 5.0 ?m or more in terms of equivalent circle diameter per 10,000-?m2 visual field in the cross section parallel to the rolling direction.

Abstract: An aluminum alloy brazing sheet may include a sacrificial material having a function of a brazing material on at least one surface of a core material, wherein the sacrificial material has a composition containing: in a mass %, 2% to 5% of Si; 3% to 5% of Zn; and an Al balance with inevitable impurities the core material is made of an Al—Mn-based alloy, an in the core material before brazing, Al—Mn based secondary particles having an equivalent circle diameter of 100 to 400 nm are distributed with a number density of 0.3 to 5 particles/?m2.

Abstract: The aluminum alloy clad material includes a core material and sacrificial materials disposed on both surfaces of the core material, the composition of the core material contains, by mass %, Mn: 0.7% to 1.8%, Si: 0.3% to 1.3%, Fe: 0.05% to 0.7% and Zn: 0.5% to 3.0% with a remainder consisting of Al and inevitable impurities, the composition of the sacrificial material contains, by mass %, Mn: 0.005% to 0.7%, Fe: 0.05% to 0.3% and Zn: 1.0% to 4.0% with a remainder consisting of Al and inevitable impurities, an amount of Zn in the sacrificial material is larger than an amount of Zn in the core material by 0.2% or more, and the potential of the core material after a brazing heat treatment is within a range of ?700 to ?870 mV.

Abstract: An aluminum brazing sheet for flux-free brazing having a multilayer structure of two or more layers including at least one core material layer and one brazing material layer, wherein the brazing material layer is positioned on one or both sides of the core material layer and on an outermost surface of the brazing sheet. The brazing material layer is made of an Al—Si—Mg—X brazing material containing: in mass%, 0.05 to 2.0% of Mg, and 2.0 to 14.0% of Si, and further containing one or more of 0.01 to 0.3% of Bi, Ga, Sn, In and Pb, a total amount of Bi, Ga, Sn, In and Pb being 0.5% or less. X indicates one or more of Bi, Ga, Sn, In and Pb.

Abstract: An aluminum alloy foil having a composition contains Si: 0.5 mass % or less, Fe: 0.2 mass % or more and 2.0 mass % or less, Mg: more than 1.5 mass % and 5.0 mass % or less, and Al balance containing inevitable impurities. In the aluminum alloy foil, Mn is desirably 0.1 mass % or less in the inevitable impurities, and preferably, the tensile strength is 180 MPa or more, the elongation is 15% or more, and the average crystal grain diameter is 25 ?m or less.

Abstract: An aluminum alloy foil having a composition contains Si: 0.5 mass % or less, Fe: 0.2 mass % or more and 2.0 mass % or less, Mg: 0.1 mass % or more and 1.5 mass % or less, and Al balance containing inevitable impurities, and if desired, Mn is regulated to 0.1 mass % or less in the inevitable impurities, and preferably, the tensile strength is 110 MPa or more 180 MPa or less, the elongation is 10% or more, and the average crystal grain diameter is 25 ?m or less.

Abstract: An inner spiral grooved tube includes: a tube body; and grooves and fins aligned in an inner circumferential direction of the tube body, wherein the grooves and the fins are formed in a spiral along a longitudinal direction, an outer diameter is 3 mm or more and 10 mm or less, a number of the fins is 30 to 60, made of a metal, a cross sectional shape of each of the fins has a rectangular shape having an apex angle of 0±10°, a ratio h/f is 0.90 or more and 3.40 or less, h being a fin height and f being fin width, a ratio c/f is 0.50 or more and 3.80 or less, c being a fin spacing, and an average of the ratio h/f and the ratio c/f is 0.8 or more and 3.3 or less.

Abstract: In a mixed composition coating material for brazing, when a total mass of a solid material, an organic solvent, and water is defined as 100 mass %, the solid material are contained in an amount of 30 mass % or greater and 80 mass % or less with respect to the whole coating material, the organic solvent and the water is contained in a total amount of 20 mass % or greater and 70 mass % or less with respect to the whole coating material, and the water is contained in an amount of 0.4 mass % or greater and 2.5 mass % or less with respect to the whole coating material.