Aleris Aluminum Koblenz Gmbh

Stefan Moldenhauer

Ingo Günther Kröpfl

Claus Jürgen Moritz

Ingo Günther KRÖPFL

Aluminum alloy plate having improved resistance against incoming kinetic energy projectiles, the plate having a gauge of 10 mm or more and the aluminum alloy having a chemical composition including, in weight percent: Mg 4.0 to 6.0, Mn 0.2 to 1.4, Zn 0.9 max., Zr&#x3c;0.3, Cr&#x3c;0.3, Sc&#x2266;0.5, Ti&#x2266;0.3, Fe&#x3c;0.5, Si&#x3c;0.45, Ag&#x3c;0.4, Cu&#x3c;0.25, other elements and unavoidable impurities each &#x3c;0.05, total &#x3c;0.20, balance aluminum, and wherein the alloy plate is obtained by a manufacturing process including casting, preheating and/or homogenization, hot rolling, a first cold working operation, an annealing treatment at a temperature of less than 350&#xb0; C., followed by a second cold working operation.

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Bad Ems, Germany

Stefan Moldenhauer