High strength aluminum 
alloy powders, extrusions, and forgings are provided in which the aluminum alloys exhibit high strength at atmospheric temperatures and maintain high strength and 
ductility at extremely low temperatures. The 
alloy is produced by blending about 89 atomic % to 99 atomic % aluminum, 1 atomic % to 11 atomic % of a secondary 
metal selected from the group consisting of 
magnesium, 
lithium, 
silicon, 
titanium, 
zirconium, and combinations thereof, and up to about 10 atomic % of a 
tertiary metal selected from the group consisting of Be, Ca, Sr, Ba, Ra, Sc, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, W, and combinations thereof. The 
alloy is produced by 
nanostructure material synthesis, such as cryomilling, in the absence of 
refractory dispersoids. The synthesized alloy is then canned, degassed, consolidated, extruded, and optionally forged into a 
solid metallic component. Grain size within the alloy is less than 0.5 μm, and alloys with grain size less than 0.1 μm may be produced.