Product Code:SAE AMS4004Title:Aluminum Alloy, Foil, 2.5Mg - 0.25Cr (5052-H191), Strain HardenedIssuing Committee:Ams D Nonferrous Alloys CommitteeScope:This specification covers an aluminum alloy in the form of foil.This foil has been used typically for corrugated or expanded honeycomb core material for use in sandwich construction, but usage is not limited to such applications.