Almg - alloy with improved mechanical properties for welded structures

摘要

The invention relates to the metal sheets for welded constructions, almg alloy having a rupture strength rm & 275 mpa, an elongation is 17,5% and a product a rm ≧ 6000 of composition (% by weight): & br / mg: 4,3 - 4,8 mn: ≤ 0,5, zn br 0,4 fe & 0,45 if / 0,30 and, optionally: & br / & cr 0,15 cu 0,25 0,20 zr, ti 0,20 br / other elements and 0,05 each 0,15 in total, & br / with the relationships: mn + 0,7 fe, zn and 0,5mn. & br / the sheets according to the invention are intended especially for the manufacture of tanks railroad or road.