Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
An aluminum alloy shape formed of an aluminum alloy consisting essentially of 0.65 to 0.75% by weight of magnesium, 0.5 to 0.6% by weight of silicon, 0.15 to 0.25% by weight of iron, less than 0.05% by weight of impurities selected from the group consisting of zinc, manganese, chromium, copper, and titanium, and the balance aluminum, said aluminum shape having thereon an anodized oxide film and being coated over its surface with a water-soluble paint which has been hardened at a temperature below 200° C., and having been subjected to an aging treatment at a temperature below 200° C. for 20 to 50 minutes to deposit Mg 2 Si to obtain a 0.2% proof stress larger than 11 kg/mm 2 , an ultimate tensile strength larger than 20 kg/mm 2 and an elongation more than 8%.
Claim 2
Dependent Claim
136 words
An aluminum alloy shape formed of an aluminum alloy consisting essentially of 0.65 to 0.75% by weight of magnesium, 0.5 to 0.6% by weight of silicon, 0.15 to 0.25% by weight of iron, less than 0.05% by weight of impurities selected from the group consisting of zinc, manganese, chromium, copper, and titanium, and the balance aluminum, said aluminum shape having thereon an anodized oxide film and being coated over its surface with a water-soluble paint which has been hardened at a temperature below 200° C., and having been subjected to an aging treatment at a temperature below 200° C. for 20 to 50 minutes to deposit Mg 2 Si to obtain a 0.2% proof stress larger than 11 kg/mm 2 , an ultimate tensile strength larger than 20 kg/mm 2 and an elongation more than 8%.
Claim 3
Dependent Claim
136 words
An aluminum alloy shape formed of an aluminum alloy consisting essentially of 0.47 to 0.57% by weight of magnesium, 0.75 to 0.85% by weight of silicon, 0.15 to 0.25% by weight of iron, less than 0.05% by weight of impurities selected from the group consisting of zinc, manganese, chromium, copper and titanium, and the balance aluminum, said aluminum shape having thereon an anodized oxide film and being coated over its surface with a water-soluble paint which has been hardened at a temperature below 200° C., and having been subjected to an aging treatment at a temperature below 200° C. for 20 to 50 minutes to deposit Mg 2 Si to obtain a 0.2% proof stress larger than 11 kg/mm 2 , an ultimate tensile strength larger than 20 kg/mm 2 and an elongation more than 8%.
Claim 4
Dependent Claim
136 words
An aluminum alloy shape formed of an aluminum alloy consisting essentially of 0.47 to 0.57% by weight of magnesium, 0.75 to 0.85% by weight of silicon, 0.15 to 0.25% by weight of iron, less than 0.05% by weight of impurities selected from the group consisting of zinc, manganese, chromium, copper and titanium, and the balance aluminum, said aluminum shape having thereon an anodized oxide film and being coated over its surface with a water-soluble paint which has been hardened at a temperature below 200° C., and having been subjected to an aging treatment at a temperature below 200° C. for 20 to 50 minutes to deposit Mg 2 Si to obtain a 0.2% proof stress larger than 11 kg/mm 2 , an ultimate tensile strength larger than 20 kg/mm 2 and an elongation more than 8%.