Unwrought and semi-wrought common metals and alloys thereof, including aluminum; raw or prepared ores of aluminum alloy; semi-finished articles of aluminum or alloys thereof; forged, molded, cast, die-cast, pressed, welded or machined construction materials and parts of metal in the nature of casings, reservoirs, hinges, missile bodies, and structural housings; iron slabs; armored metal materials particularly for aerospace, namely, booster divergent casings, missile bodies, suspension housing...