Table 6. Stress Corrosion Tests 



Alloy 



Stress, 



7o Y.S. 



Exposure, 



Depth, 



Number of 



Number 





KSI 





Days 



ft. 



Specimens 



Failed 



AISI 4340 (150 KSI) 



46.1 



35 



123 



5640 



3 









46.1 



35 



403 



6780 



2 









46.1 



35 



751 



5640 



3 









46.1 



35 



197 



2340 



3 









65.9 



50 



123 



5640 



3 









65.9 



50 



403 



6780 



2 









65.9 



50 



751 



5640 



3 









65.9 



50 



197 



2340 



3 









65.9 



50 



402 



2370 



3 









98.9 



75 



123 



5640 



3 









98.9 



75 



403 



6780 



2 









98.9 



75 



751 



5640 



3 









98.9 



75 



197 



2340 



3 









98.9 



75 



402 



2370 



3 







AISI 4340 (200 KSI) 



64.7 



35 



123 



5640 



3 









64.7 



35 



403 



6780 



2 









64.7 



35 



751 



5640 



3 









64o7 



35 



197 



2340 



3 









92.5 



50 



123 



5640 



3 









92.5 



50 



403 



6780 



2 









92.5 



50 



751 



5640 



3 









92.5 



50 



197 



2340 



3 









92.5 



50 



402 



2370 



3 









138.7 



75 



123 



5640 



3 









138.7 



75 



403 



6780 



2 









138.7 



75 



751 



5640 



3 









138.7 



75 



197 



2340 



3 









138.7 



75 



402 



2370 



3 







HSLA No, 1 



38.4 



35 



197 



2 340 



3 









54.8 



50 



197 



2340 



3 









54.8 



50 



402 



2370 



3 









82.3 



75 



197 



2340 



3 









82 ..3 



75 



402 



2370 



3 







HSLA No. 5 



41.4 



35 



197 



2340 



3 









59.1 



50 



197 



2340 



3 









59.1 



50 



402 



2370 



3 









88.7 



75 



197 



2340 



3 









88.7 



75 



402 



2370 



3 







continued 



35 



