Abstract: Brazing sheet having a core layer made of a first aluminium alloy, attached to one side of said core layer a sacrificial cladding made of a second aluminium alloy, and attached to the other side of said core layer a braze cladding made of a third aluminium alloy. The first aluminium alloy consists of: Si ?0.6 wt %; Fe ?0.7 wt %; Cu 0.4-0.9 wt %; Mn 1.0-1.6 wt %; Mg ?0.2 wt %; Cr 0.05-0.15 wt %; Zr 0.05-0.15 wt %; Ti 0.05-0.15 wt %; other elements ?0.05 wt % each and ?0.2 wt % total; Al balance up to 100 wt %; the second aluminium alloy consists of: Si 0.65-1.0 wt %; Fe ?0.4 wt %; Cu ?0.05 wt %; Mn 1.4-1.8 wt %; Zn 1.5-4.0 wt %; Zr 0.05-0.20 wt %; other elements ?0.05 wt % each and ?0.2 wt % total; Al balance up to 100 wt %. The third aluminium alloy has a melting point lower than said first and second aluminium alloys.

Abstract: Brazing sheet having a core layer made of a first aluminium alloy, attached to one side of said core layer a sacrificial cladding made of a second aluminium alloy, and attached to the other side of said core layer a braze cladding made of a third aluminium alloy. The first aluminium alloy consists of: Si ?0.6 wt %; Fe ?0.7 wt %; Cu 0.4-0.9 wt %; Mn 1.0-1.6 wt %; Mg ?0.2 wt %; Cr 0.05-0.15 wt %; Zr 0.05-0.15 wt %; Ti 0.05-0.15 wt %; other elements ?0.05 wt % each and ?0.2 wt % total; Al balance up to 100 wt %; the second aluminium alloy consists of: Si 0.65-1.0 wt %; Fe ?0.4 wt %; Cu ?0.05 wt %; Mn 1.4-1.8 wt %; Zn 1.5-4.0 wt %; Zr 0.05-0.20 wt %; other elements ?0.05 wt % each and ?0.2 wt % total; Al balance up to 100 wt %. The third aluminium alloy has a melting point lower than said first and second aluminium alloys.

Abstract: Brazing sheet having a core layer made of a first aluminium alloy, attached to one side of said core layer a sacrificial cladding made of a second aluminium alloy, and attached to the other side of said core layer a braze cladding made of a third aluminium alloy. The first aluminium alloy consists of: Si 0.2-1.0 wt %; Fe 0.15-0.9 wt %; Cu 0.2-0.9 wt %; Mn 1.0-1.6 wt %; Mg ?0.3 wt %; Cr 0.05-0.15 wt %; Zr 0.05-0.25 wt %; Ti 0.05-0.25 wt %; other elements ?0.05 wt % each and ?0.2 wt % total; Al balance up to 100 wt %; the second aluminium alloy consists of: Si 0.45-1.0 wt %; Fe ?0.4 wt %; Cu ?0.05 wt %; Mn 1.2-1.8 wt %; Ti ?0.10 wt %, Zn 1.3-5.5 wt %; Zr 0.05-0.20 wt %; other elements ?0.05 wt % each and ?0.2 wt % total; Al balance up to 100 wt %. Third aluminium alloy has a melting point lower than said first and second aluminium alloys.

Abstract: Compact aluminum heat exchanger manufactured from welded flat tubes with internal and/or external fins for cooling of power electronic devices and/or battery cells. The fin insert is prefabricated and inserted into the flat tubes for facilitating of flow turbulence and thus heat dissipation and have fins with undulating or wavelike shape manufactured by sampling or corrugating. Flat tubes are bent and welded along their length on their smaller side facilitating mechanical strength of the tubes. Tubes are manufactured from a core alloy containing 0.3 to 1.8 wt % Mn, 0.25-1.2 wt % Cu, ?0.02 wt % Mg, ?0.01 wt % Si, ?0.05 wt % Fe, ?0.2 wt % Cr, balance aluminum and unavoidable impurities up to 0.05 wt %. Fin inserts are manufactured from aluminum alloy comprising Mn 0-3 wt %, Fe 0-1.5 wt %, Cu 0-1.5 wt %, Mg 0-1.5 wt %, Si 0-1.0 wt %, Zn 0-4 wt %, Ni 0-1 wt % and Zr, Ti, Cr V 0-0.3 wt % each.

Abstract: Compact aluminum heat exchanger manufactured from welded flat tubes with internal and/or external fins for cooling of power electronic devices and/or battery cells. The fin insert is prefabricated and inserted into the flat tubes for facilitating of flow turbulence and thus heat dissipation and have fins with undulating or wavelike shape manufactured by sampling or corrugating. Flat tubes are bent and welded along their length on their smaller side facilitating mechanical strength of the tubes. Tubes are manufactured from a core alloy containing 0.3 to 1.8 wt % Mn, 0.25-1.2 wt % Cu, ?0.02 wt % Mg, ?0.01 wt % Si, ?0.05 wt % Fe, ?0.2 wt % Cr, balance aluminum and unavoidable impurities up to 0.05 wt %. Fin inserts are manufactured from aluminum alloy comprising Mn 0-3 wt %, Fe 0-1.5 wt %, Cu 0-1.5 wt %, Mg 0-1.5 wt %, Si 0-1.0 wt %, Zn 0-4 wt %, Ni 0-1 wt % and Zr, Ti, Cr V 0-0.3 wt % each.

Abstract: A multi-layered brazing sheet with improved long life corrosion resistance achieved by balancing the Zn, Cu, Mn, Si and Mg content of the core and interliner alloy. The brazing sheet has a core of a 3xxx alloy, an inner braze cladding of a 4xxx alloy, and between core and inner braze cladding an interliner of a 3xxx alloy. The 3xxx alloy of the core has 0.55-1.0 wt % Cu, 0.7-1.8 wt % Mn, <0.3 wt % Mg, <0.4 wt % Zn. The 3xxx alloy of the interliner has <0.25 wt % Cu, 0.5-1.5 wt % Mn, <0.3 wt % Mg, 0.1-5.0 wt % Zn. A 1xxx or 7xxx alloy could be used for the interliner instead of the 3xxx alloy.

Abstract: Disclosed is a process for producing an Al—Mn alloy sheet with improved liquid film migration resistance when used as core alloy in brazing sheet, including the steps of: casting an ingot having a composition comprising (in weight percent): 0.5<Mn?1.7, 0.06<Cu?1.5, Si?1.3, Mg?0.25, Ti<0.2, Zn?2.0, Fe?0.5, at least one element of the group of elements of 0.05<Zr?0.25 and 0.05<Cr?0.25; other elements <0.05 each and total <0.20, balance Al; homogenisation and preheat; hot rolling; cold rolling (including intermediate anneals whenever required), and wherein the homogenisation temperature is at least 450° C. for a duration of at least 1 hour followed by an air cooling at a rate of at least 20° C./h and wherein the pre-heat temperature is at least 400° C. for at least 0.5 hour.

Abstract: A multi-layered brazing sheet with improved long life corrosion resistance achieved by balancing the Zn, Cu, Mn, Si and Mg content of the core and interliner alloy. The brazing sheet has a core of a 3xxx alloy, an inner braze cladding of a 4xxx alloy, and between core and inner braze cladding an interliner of a 3xxx alloy. The 3xxx alloy of the core has 0.55-1.0 wt % Cu, 0.7-1.8 wt % Mn, <0.3 wt % Mg, <0.4 wt % Zn. The 3xxx alloy of the interliner has <0.25 wt % Cu, 0.5-1.5 wt % Mn, <0.3 wt % Mg, 0.1-5.0 wt % Zn. A 1xxx or 7xxx alloy could be used for the interliner instead of the 3xxx alloy.

Abstract: Disclosed is a process for producing an Al—Mn alloy sheet with improved liquid film migration resistance when used as core alloy in brazing sheet, including the steps of: casting an ingot having a composition comprising (in weight percent): 0.5<Mn?1.7, 0.06<Cu?1.5, Si?1.3, Mg?0.25, Ti<0.2, Zn?2.0, Fe?0.5, at least one element of the group of elements of 0.05<Zr?0.25 and 0.05<Cr?0.25; other elements<0.05 each and total<0.20, balance Al; homogenisation and preheat; hot rolling; cold rolling (including intermediate anneals whenever required), and wherein the homogenisation temperature is at least 450° C. for a duration of at least 1 hour followed by an air cooling at a rate of at least 20° C./h and wherein the pre-heat temperature is at least 400° C. for at least 0.5 hour.