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@carson
if it's 7000 series it's either 7005 or 7075
The alloy composition of 7005 is:
Aluminium 91.0% - 94.7%
Chromium 0.06% - 0.20%
Copper <=0.10 %
Iron <=0.40 %
Magnesium 1.0% - 1.80%
Manganese 0.20% - 0.70%
Silicon <=0.35%
Titanium 0.010% - 0.060%
Zinc 4.0% - 5.0%
Zirconium 0.080% - 0.20%
Other, total <= 0.15%
7075 aluminum alloy's composition roughly includes 5.6–6.1% zinc, 2.1–2.5% magnesium, 1.2–1.6% copper, and less than half a percent of silicon, iron, manganese, titanium, chromium, and other metals.