Table 79. Stress Corrosion of 7000 Series Aluminum Alloys 



Alloy 



Stress 

 (ksi) 



Percent 



Yield 



Strength 



Exposure 

 (day) 



Depth 

 (ft) 



Number of 



Specimens 



Exposed 



Number 

 Failed 



Source 1 



7002-T6 



18 



30 



403 



6,780 



3 







NADC (7) 



7002-T6 



45 



75 



403 



6,780 



3 







NADC (7) 



7O02-T6 



18 



30 



402 



2,370 



3 







NADC (7) 



7002-T6 



30 



50 



402 



2,370 



3 







CEL (4) 



7002-T6 



45 



75 



402 



2,370 



3 







NADC (7) 



7002-T6 



45 



75 



402 



2,370 



3 







CEL (4) 



Alclad 7002-T6 



18 



30 



403 



6,780 



3 







NADC (7) 



Alclad 7002-T6 



45 



75 



403 



6,780 



3 







NADC (7) 



Alclad 7002-T6 



18 



30 



402 



2,370 



3 







NADC (7) 



Alclad 7002-T6 



29 



50 



402 



2,370 



3 







CEL (4) 



Alclad 7002-T6 



45 



75 



402 



2,370 



3 







NADC (7) 



Alclad 7002-T6 



43 



75 



402 



2,370 



3 







CEL (4) 



7075-T6 



22 



30 



40 3 



6,780 



3 



1 



NADC (7) 



7075-T6 



55 



75 



403 



6,780 



3 



b 



NADC (7) 



7075-T6 



22 



30 



197 



2,340 



3 







NADC (7) 



7075-T6 



55 



75 



197 



2,340 



3 



2 



NADC (7) 



7075-T6 



22 



30 



402 



2,370 



3 







NADC (7) 



7075-T6 



55 



75 



402 



2,370 



3 



2 



NADC (7) 



7075-T6A c 



12 



30 



40 3 



6,780 



3 



b 



NADC (7) 



7075-T6A t 



30 



75 



403 



6,780 



3 



b 



NADC (7) 



7075-T6A C 



12 



30 



197 



2,340 



3 







NADC (7) 



7075-T6A c 



30 



75 



197 



2,340 



3 







NADC (7) 



7075-T6A C 



12 



30 



402 



2,370 



3 







NADC (7) 



7075-T6A C 



30 



75 



402 



2,370 



3 







NADC (7) 



7075-T73 



24 



30 



403 



6,780 



3 







NADC (7) 



7075-T73 



51 



75 



403 



6,780 



3 







NADC (7) 



7075-T73 



24 



30 



197 



2,340 



3 







NADC (7) 



707S-T73 



51 



75 



197 



2,340 



3 







NADC (7) 



7075-T73 



24 



30 



402 



2,370 



3 







NADC (7) 



7075-T73 



51 



75 



402 



2,370 



3 







NADC (7) 



7079-T6 



34 



50 



402 



2,370 



3 



2 



CEL (4) 



7079-T6 



50 



75 



402 



2,370 



3 



3 



CEL (4) 



Alclad 7079-T6 



35 



50 



402 



2,370 



3 



1 



CEL (4) 



Alclad 7079-T6 



53 



75 



402 



2,370 



3 



2 



CEL (4) 



7178-T6 



19 



30 



403 



6,780 



3 







NADC (7) 



7178-T6 



49 



75 



403 



6,780 



3 



b 



NADC (7) 



7178-T6 



19 



30 



197 



2,340 



3 







NADC (7) 



7178-T6 



49 



75 



197 



2,340 



3 







NADC (7) 



7178-T6 



19 



30 



402 



2,370 



3 







NADC (7) 



7178-T6 



41 



50 



402 



2,370 



3 







CEL (4) 



7178-T6 



49 



75 



402 



2,370 



3 



3 



NADC (7) 



7178-T6 



61 



75 



402 



2,370 



3 



3 



CEL (4) 



■ XAP001-T6 



6 



30 



403 



6,780 



3 



b 



NADC (7) 



I XAP001-T6 



15 



75 



403 



6,780 



3 







NADC (7) 



' Numbers refer to references at end of report. 



Missing when STU was recovered. 

 'Alloy 7076-T6 heated 8 hours at 350°F, air cooled. 



221 



