Al-Mg-Si Al-Mg-Si ALUMINIUM ALLOY WITH IMPROVED PROPERTIES

摘要

The present invention relates to an extrudable Al-Mg-Si aluminum alloy with improved strength, corrosion resistance, crushing properties and temperature stability and particularly useful for the front structure of a vehicle. The composition of the alloy is specified within the following coordinate points of the Mg-Si diagram: a1-a2-a3-a4, where a1=0.60 Mg, 0.65 Si, a2=0.90 Mg, 1.0 Si, a3=1.05 Mg, in wt%, 0.75 Si, a4=0.70 Mg, 0.50 Si, and the alloy has a non-recrystallized grain structure in the extruded profile, further containing the following alloy components in wt%: Fe: up to 0.30; Cu: 0.1-0.4; Mn: 0.4-1.0; Cr: up to 0.25; Zr: up to 0.25; Ti: 0.005-0.15; And Zn up to 0.5, unavoidable impurities and Al balance up to 0.1 respectively.