Aluminum alloy for producing roll-shaped products

Abstract

The invention relates to an aluminium alloy for manufacturing rollform products comprising the following alloy constituent in weight percentages:  0.1 ≦ Si ≦ 0.5 0.15 ≦ Fe ≦ 0.5 0.05 ≦ Cu ≦ 0.25  0.8 ≦ Mn ≦ 1.4  0.4 ≦ Mg ≦ 1.3 others in sum maximum 0.15, individually maximum 0.05, rest Al. Said aluminium alloy ensures the manufacture of rollform products with high stability in thin metal thicknesses.

1 . A use of an aluminium alloy for manufacturing roll-formed products comprising the following alloy constituent in weight percentages:  
       
         
           
                 
                 
               
                     
                     
                 
                     
                     
                 
                     
                    0.1 ≦ Si ≦ 0.5 
                 
                     
                   0.15 ≦ Fe ≦ 0.5 
                 
                     
                   0.05 ≦ Cu ≦ 0.25 
                 
                     
                    0.8 ≦ Mn ≦ 1.4 
                 
                     
                    0.4 ≦ Mg ≦ 1.3 
                 
                     
                     
                 
                     
                     
                 
             
                
                
               
               
                
                
                
                
                
                
                
               
            
           
         
         others in sum maximum 0.15, individually maximum 0.05, rest Al.  
       
     
     
         2 . A use of a strip for rollform products,  
       wherein 
 the strip is made from an aluminium alloy according to  claim 1 .  
 
     
     
         3 . A use of a strip for rollform products according to  claim 2 ,  
       wherein 
 the grain of the strip comprises 2 to 10 casting phases per 1000 μm 2  with a maximum size of 40 μm and an average length of 2 to 6 μm,  500  to  1200  fine precipitations per 1000 μm 2  as well as residual resistances within the range of 1.2 to 2.5 μtohm cm.  
 
     
     
         4 . A use of a strip according to  claim 2 ,  
       wherein 
 the strip comprises a coat of lacquer applied by coil coating method.  
 
     
     
         5 . A method for manufacturing a strip for rollform products,  
       wherein 
 the strip is essentially made from an aluminium alloy according to  claim 1 .  
 
     
     
         6 . The method for manufacturing a strip for rollform products according to  claim 5 ,  
       wherein 
 the ingot is annealed during preheating of the warm rolling process within the temperature range of 480 to 610° C. for at least 3 hours.  
 
     
     
         7 . The method for manufacturing a strip for rollform products according to  claim 5  or  6 , 
 the strip is manufactured by warm rolling in the temperature range of 270 to 550° C.