Universal Alloy Corporation

Constellium Rolled Products Ravenswood, LLC

Victor B Dangerfield

Justin D Lamb

Kenneth Paul Smith

An improved aluminum based alloy containing lithium is disclosed. The alloy may be provided as extruded aluminum-copper-lithium products having improved combinations of strength, fracture toughness, corrosion resistance and relatively low density. The extrusion alloy may include from 2.6 to 3.0 weight percent Cu, from 1.4 to 1.75 weight percent Li, from 0.0 to 0.25 weight percent Mn, from 0.10 to 0.45 weight percent Mg, from 0.05 to 0.15 weight percent Zr, from 0.00-0.10 weight percent Ti, from 0.10 weight percent maximum Si, from 0.12 weight percent maximum Fe, from 0.20 weight percent maximum Zn, and the balance Al and incidental impurities. The alloy should also be essentially Ag-free with Ag only being an accidental impurity in levels less than 0.05 weight percent maximum. In certain embodiments, the aluminum-copper-lithium alloys may be provided in the form of extruded products having improved combinations of strength and fracture toughness.

Low density aluminum-copper-lithium alloy extrusions

A high strength aluminum alloy is suitable for ultra thick gauge wrought product. The alloy can have 6 to 8 wt % zinc, 1 to 2 wt % magnesium, and dispersoid forming elements such as Zr, Mn, Cr, Ti, and/or Sc with the balance made of aluminum and incidental elements and/or impurities. The alloy is suitable for many uses, including in molds for injection-molded plastics.

Growing community of inventors

Canton, GA, United States of America

Victor B Dangerfield