Abstract: The present invention provides a method for producing AlMn strip or sheet for making components by brazing, as well as the products obtained by said method. In particular this method is related to fin materials used in heat exchangers. The fins can be delivered with or without a cladding depending on application. Rolling slabs are produced from a melt which contains 0.3-1.5% Si, ?0.5% Fe, ?0.3% Cu, 1.0-2.0% Mn, ?0.5% Mg, ?4.0% Zn, ?0.3% each of elements from group IVb, Vb, or VIb elements, and unavoidable impurity elements, as well as aluminum as the remainder in which the rolling slabs prior to hot rolling are preheated at a preheating temperature of less than 550° C., preferably between 400 and 520° C., more preferably between 450 and 520° C. to control the number and size of dispersoid particles, and the preheated rolling slab is hot rolled into a hot strip. The strip is thereafter cold rolled into a strip with a total reduction of at least 90%, and the cold rolled strip is heat treated to obtain a 0.

Abstract: The invention relates to a method for making a sandwich?material for brazing, comprising the steps of: providing a core layer of a first alloy that contains (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 impurities; providing a barrier layer of a second alloy that contains (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 impurities; rolling the layers together so that they adhere and form a sandwich material; heat treating the sandwich material at a predetermined temperature and for a predetermined time so that the Si-content is equalized to 0.4-1% in both core layer and barrier layer; rolling the sandwich material to a final thickness.

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: 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: 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: The present invention provides a method for producing AlMn strip or sheet for making components by brazing, as well as the products obtained by said method. In particular this method is related to fin materials used in heat exchangers. The fins can be delivered with or without a cladding depending on application. Rolling slabs are produced from a melt which contains 0.3-1.5% Si, ?0.5% Fe, ?0.3% Cu, 1.0-2.0% Mn, ?0.5% Mg, ?4.0% Zn, ?0.3% each of elements from group IVb, Vb, or VIb elements, and unavoidable impurity elements, as well as aluminium as the remainder in which the rolling slabs prior to hot rolling are preheated at a preheating temperature of less than 550° C., preferably between 400 and 520° C., more preferably between 450 and 520° C. to control the number and size of dispersoid particles, and the preheated rolling slab is hot rolled into a hot strip. The strip is thereafter cold rolled into a strip with a total reduction of at least 90%, and the cold rolled strip is heat treated to obtain a 0.