Patent ID: 6921584
Filing Date: 2005-07-26
Classification: B23K,B32B,C22C,F28F,Y10S,Y10T

Abstract:
1. Heat exchanger exhibiting an optimal combination of applied Al-alloys with regard to corrosion resistance of its structural components, said heat exchanger comprising tubes for circulation of heat exchanging media made having a core of Al-alloy comprising 0.7 to 1.5 weight % Mn, maximum 0.6 weight % Si, maximum 0.6 weight % Fe, maximum 0.6 weight % Zn, maximum 1.0 weight % Cu, maximum 0.4 weight % Mg, maximum 0.5 weight % Ti, and the balance aluminium, said core being provided with an outer clad material comprising 4-14 weight % Si, maximum 0.8 weight % Fe, maximum 0.5 weight % Cu, maximum 0.5 weight % Mg, maximum 0.5 weight % Mn, 0.1-2 weight % Zn, maximum 0.5 weight % Ti, and the balance aluminium, and an inner clad material comprising 0.7 to 1.5 weight % Mn, maximum 1.2 weight % Si, maximum 0.6 weight % Fe, 1.0-2.0 weight % Zn, maximum 0.5 weight % Cu, 0.5 weight % Mg, maximum 0.5 weight % Ti, and the balance aluminium, further comprising fins comprising 0.7 to 1.5 weight % Mn, maximum 1.2 weight % Si, maximum 0.6 weight % Fe, 0.1 to 2 weight % Zn, maximum 1.0 weight % Cu, maximum 0.4 weight % Mg, maximum 0.5 weight % Ti, and the balance aluminium, and plates such as header and side plates having core comprising 0.7 to 1.5 weight % Mn, maximum 1.2 weight % Si, maximum 0.6 weight % Fe, 0.1 to 2 weight % Zn, maximum 1.0 weight % Cu, maximum 0.4 weight % Mg, maximum 0.5 weight % Ti, and the balance aluminium, said plates being optionally clad with Al-alloy comprising 4-14 weight % Si, maximum 0.8 weight % Fe, maximum 0.5 weight % Cu, maximum 0.5 weight % Mg, maximum 0.5 weight % Mn, 0.1-2 weight % Zn, maximum 0.5 weight % Ti, and the balance aluminium.