HARDENABLE Al-Mg-Si-BASED ALUMINUM ALLOY

Abstract

A hardenable Al—Mg—Si-based aluminum alloy is shown. In order to provide a recycling-friendly, storage-stable and particularly thermosetting aluminum alloy, it is proposed that this aluminum alloy should contain from 0.6 to 1% by weight of magnesium (Mg), from 0.2 to 0.7% by weight of silicon (Si), from 0.16 to 0.7% by weight of iron (Fe), from 0.05 to 0.4% by weight of copper (Cu), a maximum of 0.15% by weight of manganese (Mn), a maximum of 0.35% by weight of chromium (Cr), a maximum of 0.2% by weight of zirconium (Zr), a maximum of 0.25% by weight of zinc (Zn), a maximum of 0.15% by weight of titanium (Ti), 0.005 to 0.075% by weight of tin (Sn) and/or indium (In), and the remainder aluminum and production-related unavoidable impurities, wherein the ratio of the weight percentages of Si/Fe is less than 2.5 and the content of Si is determined according to the equation wt. % Si=A+[ 0.3 *(wt. % Fe)], with the parameter A being in the range of 0.17 to 0.4% by weight.

1 . A hardenable Al—Mg—Si-based aluminum alloy, comprising:
 from 0.6 to 1% by weight of magnesium (Mg), 
 from 0.2 to 0.7% by weight of silicon (Si), 
 from 0.16 to 0.7% by weight of iron (Fe), 
 from 0.05 to 0.4% by weight of copper (Cu), 
 a maximum of 0.15% by weight of manganese (Mn), 
 a maximum of 0.35% by weight of chromium (Cr), 
 a maximum of 0.2% by weight of zirconium (Zr), 
 a maximum of 0.25% by weight of zinc (Zn), 
 a maximum of 0.15% by weight of titanium (Ti), 
 0.005 to 0.075% by weight of tin (Sn) and/or indium (In), 
 and aluminum as a remainder as well as production-related unavoidable impurities, wherein 
 a ratio of the weight percentages of Si/Fe is less than 2.5, 
 and the content of Si is determined according to the equation
   wt. % Si= A +[0.3*(wt. % Fe)], 
 
 with the parameter A being in a range of 0.17 to 0.4% by weight. 
 
     
     
         2 . Aluminum alloy according to  claim 1 , wherein the parameter A is in the range of 0.26 to 0.34% by weight. 
     
     
         3 . Aluminum alloy according to  claim 1 , wherein the parameter A is 0.3% by weight. 
     
     
         4 . Aluminum alloy according to  claim 1 , wherein the content of Si is determined according to the equation
   wt. % Si= A +[0.3*(wt. % Fe)]−wt % Ti.
   
     
     
         5 . Aluminum alloy according to  claim 1 , wherein the ratio of the weight percentages of Si/Fe is less than 2. 
     
     
         6 . Aluminum alloy according to  claim 1 , wherein the ratio of the weight percentages of Si/Mg is in the range of 0.3 to 0.9. 
     
     
         7 . Aluminum alloy according to  claim 1 ,
 wherein the aluminum alloy has at least 0.25% by weight of copper (Cu).   
     
     
         8 . Aluminum alloy according to  claim 1 ,
 wherein the aluminum alloy comprises tin (Sn) in a range of 0.005 to 0.05% by weight in solid solution in an aluminum mixed crystal.   
     
     
         9 . Aluminum alloy according to  claim 1 ,
 wherein the aluminum alloy belongs to the 6xxx series.   
     
     
         10 . Aluminum alloy according to  claim 1 ,
 wherein the aluminum alloy has a maximum of 0.05% by weight of chromium (Cr) and more than 0.05% by weight of zirconium (Zr).   
     
     
         11 . Aluminum alloy according to  claim 1 , wherein the aluminum alloy has at least 0.02% by weight of chromium (Cr).