Patent ID: 7060139

Claim:
An aluminum based alloy composition comprising: between about 6.0% by wt. and about 12.0% by wt. of zinc; between about 2.0% by wt. and about 3.5% by wt. of magnesium; between about 0.1% by wt. and about 0.5% by wt. of scandium; between about 0.05% by wt. and about 0.20% by wt. of zirconium; between about 0.5% by wt. and about 3.0% by wt. of copper; between about 0.10% by wt. and about 0.45% by wt. of manganese; between about 0.08% by wt. and about 0.35% by wt. of iron; between about 0.07% by wt. and about 0.20% by wt. of silicon; and aluminum, wherein said aluminum alloy has a tensile strength of at least 790 MPa with an elongation of at least 6% at a cryogenic temperature of about −196° C.