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SAE AMS4144 Revision F, May 1, 2006
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Aluminum Alloy, Hand Forgings and Rolled Rings 6.3Cu - 0.30Mn - 0.18Zr - 0.10V - 0.06Ti (2219-T852/T851) Solution Heat Treated, Mechanically Stress Relieved, and Precipitation Heat Treated
Includes all amendments and changes through Reaffirmation Notice , September 2011
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This specification covers an aluminum alloy in the form of hand forgings and rolled rings. 

Application

These products have been used typically for structural parts subject to warpage during machining, but usage is not limited to such applications. Product may be welded in the -T852/-T851 condition but properties are improved by re-heat treatment to -T6 temper after welding. 

Certain design and fabricating procedures and service conditions may cause these products to become susceptible to stress-corrosion cracking; ARP823 recommends practices to minimize such conditions.