Abstract: An aluminum alloy brazing sheet including: a core material made of an aluminum alloy; and a cladding material clad on at least one side of the core material and made of an aluminum alloy having a potential lower than that of the core material. The cladding material is an outermost layer of the brazing sheet, wherein the cladding material is made of an aluminum alloy including 0.2 to 2.0 wt % of Mg, 0.5 to 1.5 wt % of Si, 1.0 to 2.0 wt %, preferably 1.4-1.8% of Mn, ?0.7 wt % of Fe, ?0.1 wt % of Cu, and ?4 wt % of Zn, ?0.3 wt % each of Zr, Ti, Ni, Hf, V, Cr, In, Sn and ?0.5 wt % total of Zr, Ti, Ni, Hf, V, Cr, In, Sn, the remainder being Al and unavoidable impurities.

Abstract: The invention relates to a self-fluxing brazing piece. The piece comprises a composite material comprising at least one inorganic material distributed in a metal or metal alloy matrix, the inorganic material forming a flux during brazing to promote the formation of a thermally induced metallic bond. The matrix may be an aluminum silicon brazing alloy and the inorganic material may be a potassium-fluoro-aluminate flux. The piece is made by spray forming.

Abstract: The invention relates to a sandwich material for brazing comprising a core layer of a first aluminum alloy and a barrier layer of a second aluminum alloy characterized by that: the first alloy, constituting the core layer contains (in weight %): 0.8-2% Mn, ?1.0% Mg, 0.3-1.5% Si, ?0.3% Ti, ?0.3% Cr, ?0.3% Zr, ?1.3% Cu, ?0.5% Zn, ?0.2% In, ?0.1% Sn and ?0.7% (Fe+Ni), the balance consisting of Al and ?0.05% of each of the unavoidable impurities, and that the second alloy, constituting the barrier layer contains (in weight %): ?0.2% Mn+Cr, ?1.0% Mg, ?1.5% Si, ?0.3% Ti, ?0.2% Zr, ?0.3% Cu, ?0.5% Zn, ?0.2% In, ?0.1% Sn and ?1.5% (Fe+Ni), the balance consisting of Al and ?0.05% of each of the unavoidable impurities, The invention also concerns a method for the manufacture of the sandwich material, a brazed product, such as a heat exchanger comprising the sandwich material and the use of the brazed product at high and low temperatures.

Abstract: A method for making a sandwich material. A core layer of a first alloy is provided. The first alloy includes by wt. %: 0.5-2.0% Mn, ?1.0% Mg, ?0.2% Si, ?0.3% Ti, ?0.3% Cr, ?0.3% Zr, ?0.2% Cu, ?3% Zn, ?0.2% In, ?0.1% Sn and ?0.7% (Fe+Ni), the rest Al and ?0.05% of each of unavoidable contaminants. A barrier layer of a second alloy is provided. The second alloy includes by wt. %: ?0.2% Mn+Cr, ?1.0% Mg, 1.6-5% Si, ?0.3% Ti, ?0.2% Zr, ?0.2% Cu, ?3% Zn, ?0.2% In, ?0.1% Sn and ?1.5% (Fe+Ni), the rest Al and ?0.05% of each of unavoidable contaminants. The core and barrier layers are rolled together so that they adhere and form a sandwich material. The sandwich material is heat treated so that the Si-content is equalized to 0.4-1% in the core and barrier layers. The sandwich material is rolled to a final thickness.

Abstract: An aluminium alloy brazing sheet including: a core material made of an aluminium alloy; and a cladding material clad on at least one side of the core material and made of an aluminium alloy having a potential lower than that of the core material. The cladding material is an outermost layer of the brazing sheet, wherein the cladding material is made of an aluminium alloy including 0.2 to 2.0 wt % of Mg, 0.5 to 1.5 wt % of Si, 1.0 to 2.0 wt %, preferably 1.4-1.8% of Mn, ?0.7 wt % of Fe, ?0.1 wt % of Cu, and ?4 wt % of Zn, ?0.3 wt % each of Zr, Ti, Ni, Hf, V, Cr, In, Sn and ?0.5 wt % total of Zr, Ti, Ni, Hf, V, Cr, In, Sn, the remainder being Al and unavoidable impurities.

Abstract: A method for increasing slab rolling yields and rolling mill efficiency by minimizing shearing and crop losses in the rolling of assembled slabs. An assembled structure for aluminium rolled products includes a core slab with a reduced cross-section in the thickness direction of the slab in at least one of the slab edges running parallel to the rolling direction. At least one second slab is assembled to the core slab. The edges of the slab may have a cut-out and/or a tapered shape. A method of reducing shearing and crop losses at the rolling of assembled slabs, by using a core slab with a reduced cross-section in the thickness direction of the slab in at least one of the slab edges running parallel to the rolling direction.

Abstract: The invention relates to a method for producing a heat exchanger header tank comprising the steps of providing a tube having a core made from a AA3XXX-aluminium alloy; optionally pre-heating the tube; inserting the tube into a forming tool having a forming cavity with the shape of the final header tank; plugging the ends of the tube; internally pressurising the tube by the use of a gas so as to make it conform to the shape of the tool cavity, thus obtaining the final header tank; removing the header tank from the tool; and cooling the header tank. This method allows an efficient production of header tanks of irregular shapes made of AA3XXX aluminium alloy. The invention also relates to a method for producing a heat exchanger, where the header tank is connected to a plurality of tubes and corrugated fins inserted between the tubes, followed by brazing of the fins to the tubes.

Abstract: An aluminium alloy brazing sheet comprising: a core material made of an aluminium alloy consisting of ?0.1 wt % Si, most preferably ?0.06 wt % Si, ?0.35 wt % Mg, from 1.0 to 2.0 wt %, preferably 1.4 to 1.8 wt % Mn, from 0.2 to 1.0, preferably 0.6 to 1.0 wt % Cu, ?0.7 wt % Fe, ?0.3 wt % each of Zr, Ti, Ni, Hf, V, Cr, In, Sn and ?0.5 wt % total of Zr, Ti, Ni, Hf, V, Cr, In, Sn, the remainder being Al and unavoidable impurities; and a waterside cladding material clad on at least one side of the core material, said cladding material being made of an aluminium alloy having a potential lower than that of said core material and consisting essentially of 0.5-1.5 wt % of Si, 1.0 to 2.0 wt % preferably 1.4-1.8 wt % of Mn, ?0.15 wt % Mg, ?0.1% Cu, ?0.7 wt % Fe, ?1.4 wt %, preferably ?1.1 wt %, most preferably ?0.4 wt % Zn, ?0.3 wt % each of Zr, Ti, Ni, Hf, V, Cr, In, Sn and ?0.

Abstract: The invention relates to a self-fluxing brazing piece. The piece comprises a composite material comprising at least one inorganic material distributed in a metal or metal alloy matrix, the inorganic material forming a flux during brazing to promote the formation of a thermally induced metallic bond. The matrix may be an aluminium silicon brazing alloy and the inorganic material may be a potassium-fluoro-aluminate flux. The piece is made by spray forming.

Abstract: An aluminum alloy, a clad or unclad material for a brazed product containing the alloy as a core, and a method for producing the material, wherein the material is used for manufacturing the brazed product from the alloy.

Abstract: A method for increasing slab rolling yields and rolling mill efficiency by minimizing shearing and crop losses in the rolling of assembled slabs. An assembled structure for aluminium rolled products includes a core slab with a reduced cross-section in the thickness direction of the slab in at least one of the slab edges running parallel to the rolling direction. At least one second slab is assembled to the core slab. The edges of the slab may have a cut-out and/or a tapered shape. A method of reducing shearing and crop losses at the rolling of assembled slabs, by using a core slab with a reduced cross-section in the thickness direction of the slab in at least one of the slab edges running parallel to the rolling direction.

Abstract: An aluminum alloy, a clad or unclad material for a brazed product containing the alloy as a core, and a method for producing the material, wherein the material is used for manufacturing the brazed product from the alloy.