7255 aluminium alloy is a wrought alloy with high zinc weight percentage (from 7.8 to 8.4%). It also contains magnesium, copper.
Chemical composition ElementsWeight PercentageAluminum 86.1 - 88.52%Zinc7.6 - 8.4%Copper2.0 - 2.6%Magnesium1.8 - 2.3%Zirconium0.08 - 0.15%Titanium<= 0.06%Iron <= 0.09%Chromium <= 0.04%Manganese <= 0.05%Other, each <= 0.05%Other, total <= 0.15%Silicon <= 0.06%
Properties +7255 aluminium alloy propertiesPropertiesSI Unit ValueDensity2.86 g/cc
References
Aluminium alloy table