An aluminum alloy brazing sheet having a core material, a brazing filler material provided on one surface of the core material, and an intermediate material provided between the core material and the brazing filler material. The core material contains, in mass%, Mn: 0.20% to 2.00%, Si: 0.20% to 1.50%, Cu: 0.20% to 1.50%, and Mg: 0.10% to 0.90%, with the remainder being Al and unavoidable impurities. The intermediate material contains, in mass%, Zn: 0.50% to 8.00%, and Mg: 0.10% to 0.90%, with the remainder being Al and unavoidable impurities. The brazing filler material contains, in mass%, Si: 5.00% to 15.00%, Mg: 0.10% to 0.90%, Bi: 0.10% to 0.50%, and Cu: 0.05% to 0.50%, with the remainder being Al and unavoidable impurities. The aluminum alloy brazing sheet satisfies the formula 10.0≤[Zn]/[Cu]≤40.0.

The invention relates to a multi-layered brazing sheet material comprising of an aluminum core alloy layer provided with a first brazing clad layer material on one or both sides of the aluminum core layer and at least one second brazing clad layer material positioned between the aluminum core alloy layer and the first brazing clad layer material.

Aluminum-magnesium alloys useful as welding wire and mechanical support are disclosed. The aluminum-magnesium alloys exhibit improved cold wire drawing performance. Grain refiners and methods of forming the aluminum-magnesium alloys are further disclosed.

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/μm.sup.2.

An aspect of the present disclosure is to provide a method for manufacturing a welded structure capable of effectively suppressing welding LME cracks generated during spot welding of a zinc plated steel sheet having ultra-high strength, and a welded structure manufactured using the same.

An arrangement for welded conductors for power transmission cables is provided, with conductors welded by a high conductive welding material. A method is also provided for production of welded conductors and power transmission cables including the welded conductors.

An aluminum alloy brazing sheet used for brazing of an aluminum material in an inert gas atmosphere or in vacuum is formed of a two-layer material in which a brazing material and a core material are stacked. The core material is formed of an aluminum alloy and has a grain size of 20 to 300 μm, and the aluminum alloy contains Mn of 0.50 to 2.00 mass %, Mg of 0.40 to 2.00 mass %. Si of 1.50 mass % or less, Fe of 1.00 mass % or less, and Ti of 0.10 to 0.30 mass %, with the balance being aluminum and inevitable impurities. The brazing material is formed of an aluminum alloy containing Si of 4.00 to 13.00 mass % with the balance being aluminum and inevitable impurities. In a drop-type fluidity test, a ratio α (α=K.sub.a/K.sub.b) of a fluid coefficient K.sub.a is 0.50 or more.

An aluminum alloy brazing sheet used for brazing of an aluminum material in an inert gas atmosphere or in vacuum is formed of a two-layer material in which a brazing material and a core material are stacked in this order. The core material is formed of an aluminum alloy and has a grain size of 20 to 300 μm, and the aluminum alloy contains Mn of 0.50 to 2.00 mass %, Mg of 0.40 to 2.00 mass %, Si of 1.50 mass % or less, and Fe of 1.00 mass % or less, with the balance being aluminum and inevitable impurities. The brazing material is formed of an aluminum alloy containing Si of 4.00 to 13.00 mass % with the balance being aluminum and inevitable impurities, and, in a drop-type fluidity test, a ratio α (α=K.sub.a/K.sub.b) of a fluid coefficient K.sub.a is 0.50 or more.

In a brazing sheet manufacturing method, a cladding slab is prepared by overlaying at least a core-material slab composed of an aluminum material and a filler-material slab composed of an Al—Si series alloy, in which a metal element that oxidizes more readily than Al is included in at least one of the slabs. A clad sheet is prepared by hot rolling this cladding slab, which then has at least a core material layer composed of the core-material slab and a filler material layer composed of the filler-material slab and disposed on at least one side of the core material. Then, a surface of the clad sheet is etched using a liquid etchant that contains an acid. Subsequently, the clad sheet is cold rolled to a desired thickness. In flux-free brazing, such a brazing sheet is capable of curtailing degradation in brazeability caused by fluctuations in dew point and oxygen concentration.

An aluminum alloy brazing sheet including a core material and a brazing material provided on at least one surface of the core material. The brazing material includes 5.0-9.0 mass % Si, 0.10-0.90 mass % Mg, and 0.05-0.60 mass % Bi, and further includes at least one of 0.80 mass % or less Mn and 0.60 mass % or less Ti, with the remainder being Al and inevitable impurities.