BS EN 4400-6:2019 pdf free.Aerospace series - Aluminium and aluminium-and magnesium- alloys - Technical specification Aluminium alloy forging stock. BS EN 4400-6 This European Standard defines the requirements for the ordering, manufacture, testing, inspection and delivery of aluminium alloy wrought forging stock (produced by extrusion or hot rolling) and cast forging stock. It shall be applied when referred to and...