ALUMINUM ALLOY EXCELLENT IN SCC RESISTANCE AND HAVING HIGH STRENGTH AND HIGH FORMABILITY

摘要

PURPOSE:To obtain a clad plate of Al alloy excellent in stress corrosion cracking resistance by optimizing a composition containing Mg and Cu as to core material and also optimizing a composition containing Mg and Si as to cladding material. CONSTITUTION:An aluminum alloy which has a composition consisting of 4-10% Mg, 0.2-1.0% Cu, =0.2% Fe, =0.2% Si, and the balance Al with impurities or an aluminum alloy which has a composition further containing, besides the above, one or =2 kinds among 0.01-0.2% Cr, 0.01-0.2% Zr, and 0.02-0.3% Mn is used as a core material and an aluminum alloy which has a composition consisting of 0.4-1.5% Mg, 0.3-2.0% Si, and the balance Al with impurities is used as a cladding material, and further, the thickness of the cladding material is regulated to 2-20% of the whole plate thickness per side, by which the aluminum alloy excellent in SCC resistance and having high strength and high formability can be produced.