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what is overage condition, 2000/7000 series aluminum
- Thread starter dho
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For 7075 and 7050, the T7 (or derivatives like T72, T7351, etc.) temper is solution treatment + overage. Instead of peak aging to maximum strength, overaging uses a somewhat higher aging temperature and produces somewhat lower strength, but improved ductility and fracture toughness. The T7 condition improves resistance to stress corrosion cracking and corrosion fatigue. A Google search will return many thousands of hits on this subject, but here are two documents that you might find useful:
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