High strength MG-SI type aluminum alloy

The method in accordance with 24 wherein said solution heat treated body is aged in a temperature range of 250.degree. to 450.degree. F. for a period of 8 to 24 hours.

An improved aluminum alloy, direct chill cast product capable of being aged to a T6 temper, the cast product cooled at a rate of 1.degree. to 200.degree. C./sec and having a dendritic cell spacing in the range of 5 to 100 .mu.m, the cast product consisting essentially of 0.2 to 2 wt. % Si, 0.3 to 1.7 wt. % Mg, 0.51 to 1.2 wt. % Cu, less than about 0.05 wt. % Mn, 0.05 to 0.4 wt. % Cr, 0.1 to 0.4 wt. % Fe, max. 0.2 wt. % Ti, less than 0.05 wt. % Zn, and at least one of the elements selected from the group consisting of 0.01 to 0.3 wt. % V, 0.001 to 0.1 wt. % Be and 0.01 to 0.1 wt. % Sr, the remainder comprising aluminum, incidental elements and impurities, the cast product, after homogenization, solution heat treatment and aging to a T6 condition, having a tensile strength of at least 60 ksi and an elongation of at least 10%.

An improved aluminum alloy, direct chill cast product capable of being aged to a T6 temper, the cast product cooled at a rate of 1.degree. to 100.degree. C./sec and having a dendritic cell spacing in the range of 5 to 100 .mu.m, the cast product consisting essentially of 0.6 to 1.2 wt. % Si, 1 to 1.6 wt. % Mg, 0.51 to 1 wt. % Cu, max. 0.05 wt. % Mn, 0.05 to 0.3 wt. % Cr, 0.1 to 0.4 wt. % Fe, max. 0.2 wt. % Ti, less than 0.05 wt. % Zn, and at least one of the elements selected from the group consisting of 0.01 to 0.3 wt. % V, 0.001 to 0.05 wt. % Be and 0.01 to 0.1 wt. % Sr, the remainder comprising aluminum, incidental elements and impurities, the cast product, after homogenization, solution heat treatment and aging to a T6 condition, having a tensile strength of at least 60 ksi and an elongation of at least 10%.

An improved aluminum alloy cast product, the cast product having a dendritic cell spacing in the range of 5 to 100 .mu.m, the cast product comprising 0.2 to 2 wt. % Si, 0.3 to 1.7 wt. % Mg, 0.51 to 1.2 wt. % Cu, less than about 0.05 wt. % Mn, 0.01 to 0.4 wt. % Cr, and at least one of the elements selected from the group consisting of 0.01 to 0.3 wt. % V, 0.001 to 0.1 wt. % Be and 0.01 to 0.1 wt. % Sr, the remainder comprising aluminum, incidental elements and impurities, the product having a tensile strength of at least 60 ksi and an elongation of at least 10% in the T6 condition.

An improved aluminum alloy cast product, the cast product having a dendritic cell spacing in the range of 5 to 100 .mu.m, the cast product comprising 0.2 to 2 wt. % Si, 0.3 to 1.7 wt. % Mg, 0.51 to 1.2 wt. % Cu, less than about 0.05 wt. % Mn, 0.01 to 0.4 wt. % Cr, and at least one of the elements selected from the group consisting of 0.01 to 0.1 wt. % Sr, the remainder comprising aluminum, incidental elements and impurities, the product having a tensile strength of at least 60 ksi and an elongation of at least 10% in the T6 condition.

An improved aluminum alloy cast product, the cast product solidified at a cooling rate of 1.degree. to 100.degree. C./sec and having a dendritic cell spacing in the range of 5 to 100 .mu.m, the cast product consisting essentially of 0.6 to 1.2 wt. % Si, 1 to 1.6 wt. % Mg, 0.51 to 1 wt. % Cu, max. 0.05 wt. % Mn, 0.05 to 0.3 wt. % Cr, 0.1 to 0.4 wt. % Fe, max. 0.2 wt,% Ti, less than 0.05 wt. % Zn, and at least one of the elements selected from the group consisting of 0.01 to 0.3 wt. % V, 0.001 to 0.05 wt. % Be and 0.01 to 0.1 wt. % Sr, the remainder comprising aluminum incidental elements and impurities, the product having a tensile strength of at least 60 ksi and an elongation of at least 10% in the T6 condition.

An improved aluminum base alloy ingot solidified at a cooling rate of 1.degree. to 100.degree. C./sec and having a dendritic cell spacing in the range of 5 to 100 .mu.m, the ingot consisting essentially of 0.2 to 2 wt. % Si, 0.3 to 1.7 wt. % Mg, 0.51 to 1.2 wt. % Cu, less than about 0.05 wt. % Mn, 0.01 to 0.4 wt. % Cr, max. 0.4 wt. % Fe, max. 0.2 wt. % Ti, less than 0.05 wt. % Zn, and at least one of the elements selected from the group consisting of 0.01 to 0.3 wt. % V, 0.001 to 0.1 wt. % Be and 0.01 to 0.1 wt. % Sr, the remainder comprising aluminum, incidental elements and impurities, the ingot having a tensile strength of at least 60 ksi and an elongation of at least 10% in the T6 condition.

An improved aluminum base alloy ingot solidified at a cooling rate of 1.degree. to 100.degree. C./sec and having a dendritic cell spacing in the range of 15 to 50 .mu.m, the ingot consisting essentially of 0.6 to 1.2 wt. % Si, 1 to 1.6 wt. % Mg, 0.51 to 1 wt. % Cu, max. 0.05 wt. % Mn, 0.05 to 0.3 wt. % Cr, max. 0.4 wt. % Fe, max. 0.2 wt. % Ti, less than 0.05 wt. % Zn, and at least one of the elements selected from the group consisting of 0.01 to 0.3 wt. % V, 0.001 to 0.05 wt. % Be and 0.01 to 0.1 wt. % Sr, the remainder comprising aluminum, incidental elements and impurities, the ingot having a tensile strength of at least 60 ksi and an elongation of at least 10% in the T6 condition.