7 series
aluminum alloys are aluminum magnesium zinc copper alloys, mainly zinc, but sometimes a small amount of magnesium and copper are added. Superhard aluminum alloy contains zinc, lead, magnesium and copper alloys, which is close to the hardness of steel.
7 series
aluminum alloys are heat treatable alloys, belonging to superhard aluminum alloys, with good wear resistance, slower extrusion speed than 6 series alloys and good welding performance.
7 series aluminum alloy also belongs to Aviation series, and its application scope: Aviation (aircraft load-bearing components, landing gear), rocket, propeller and aerospace.