Balanced Al-Cu-Mg-Si alloy product

Details Balanced Al-Cu-Mg-Si alloy product Balanced Al-Cu-Mg-Si alloy product

2003-08-18

2009-10-20

King, Roy (Department: 1793)

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

C148S417000

Reexamination Certificate

active

07604704

ABSTRACT:
The present invention concerns a balanced Al—Cu—Mg—Si alloy having a high toughness, good strength levels and an improved fatigue crack growth resistance, comprising essentially the following composition (in weight percent): Cu: 3.6-4.9, Mg: 1.0-1.8, Mn:≦0.50, preferably <0.30, Si: 0.10-0.40, Zr:≦0.15, Cr:≦0.15, Fe:≦0.10, the balance essentially aluminum and incidental elements and impurities. There is also disclosed a method for producing the balanced Al—Cu—Mg—Si alloy product having a high toughness and an improved fatigue crack growth resistance, and applications of that product as a structural member of an aircraft.

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