ALUMINUM ALLOY TUBE AND ALUMINUM ALLOY STRUCTURAL MEMBER FOR AUTOMOBILE USING THE SAME

摘要

An Al-Mg based aluminum alloy tube for hot working which has such an alloy composition, in mass %, that Mg: 2.5 to 2.8 %, Si: 0.25 % or less, Fe: 0.35 mass % or less, Cr: 0.25 to 0.35 % and the balance: Al and inevitable impurities, and exhibits an area proportion of cavities of 2.3 % or less after hot working; and an aluminum alloy structural member for an automobile using the aluminum alloy tube.