Wrought aluminum alloy and heat-exchanger component made of this alloy

Abstract

A wrought aluminum alloy that has very high corrosion resistance and good deformation properties. Heat-exchanger components can be produced from an aluminum alloy of this type, especially heat-exchanger hollow sections or heat-exchanger tubes. The heat-exchanger hollow sections or heat-exchanger tubes can be nicely joined by brazing with collecting tubes or plates, which are of a less noble aluminum alloy, to form a.heat exchanger.

1 . A wrought aluminum alloy with good deformation properties and very high corrosion resistance, especially a life of more than 40 days under SWAAT conditions, comprising an aluminum material with at least 99.85 wt.% aluminum, i.e., with a maximum of 0.15 wt.% of total impurities, including:  
     
       
         
               
               
               
             
                   
                   
               
                   
                   
               
                   
                 maximum 0.1 
                 wt. % iron, 
               
                   
                 maximum 0.1 
                 wt. % silicon, 
               
                   
                 maximum 0.05 
                 wt. % zinc, 
               
                   
                 maximum 0.01 
                 wt. % chromium, and 
               
                   
                 maximum 0.01 
                 wt. % zirconium, 
               
                   
                   
               
                   
                   
               
           
              
              
             
             
              
              
              
              
              
              
              
             
          
         
       
     
     with the addition of manganese, copper, and titanium resulting in the following aluminum alloy composition:  
     
       
         
               
               
               
             
                   
                   
               
                   
                   
               
                   
                 0.2 to less than 0.7 
                 wt. % manganese, 
               
                   
                 0.15 to 0.5 
                 wt. % copper, 
               
                   
                 0.003 to 0.01 
                 wt. % titanium, 
               
                   
                 maximum 0.15 
                 wt. % unavoidable impurities, total, 
               
                   
                 remainder 
                 aluminum. 
               
                   
                   
               
                   
                   
               
           
              
              
             
             
              
              
              
              
              
              
              
             
          
         
       
     
   
   
       2 . The aluminum alloy in accordance with  claim 1 , comprising 0.7 wt.% manganese.  
   
   
       3 . The aluminum alloy in accordance with  claim 1 , comprising 0.4 to 0.6 wt.% manganese and 0.2 to 0.4 wt.% copper.  
   
   
       4 . The aluminum alloy in accordance with  claim 1 , comprising 0.5 wt.% manganese and 0.3 wt.% copper.  
   
   
       5 . The aluminum alloy in accordance with  claim 1 , comprising a maximum of 0.8 wt.% iron and a maximum of 0.6 wt.% iron.  
   
   
       6 . A heat-exchanger component produced from a wrought aluminum alloy of the following composition:  
     
       
         
               
               
               
             
                   
                   
               
                   
                   
               
                   
                 0.2 to less than 0.7 
                 wt. % manganese, 
               
                   
                 0.15 to 0.5 
                 wt. % copper, 
               
                   
                 0.003 to 0.01 
                 wt. % titanium, 
               
                   
                 maximum 0.15 
                 wt. % unavoidable impurities, total, 
               
                   
                 remainder 
                 aluminum. 
               
                   
                   
               
                   
                   
               
           
              
              
             
             
              
              
              
              
              
              
              
             
          
         
       
     
   
   
       7 . A heat-exchanger component in accordance with  claim 6 , the component being shaped by extrusion into a tube or hollow section and into a flat multichamber hollow section.  
   
   
       8 . A heat exchanger with collecting tubes and plates, each made of aluminum alloy material, and with heat-exchanger hollow sections or heat-exchanger tubes made of a wrought aluminum alloy in accordance with  claim 1 , wherein the collecting tubes or plates are joined with the heat-exchanger hollow sections or heat-exchanger tubes by brazing, wherein the collecting tubes and/or plates consist of a less noble aluminum alloy than the heat-exchanger hollow sections or heat-exchanger tubes.  
   
   
       9 . The heat exchanger in accordance with  claim 8 , wherein the collecting tubes and/or plates are comprised of an aluminum alloy with more than 0.1 wt.% zinc  
   
   
       10 . The heat exchanger in accordance with  claim 8 , wherein the zinc content is 1-2 wt.%.  
   
   
       11 . The heat exchanger in accordance with  claim 8 , wherein the collecting tubes and/or plates consist as comprising of an aluminum alloy with less than 0.15 wt.% copper.