Table 12. Stress Corrosion of Coppers 



Alloy 



CDA No." 



Stress 

 (ksi) 



Yield 



Strength 



(%) 



Exposure 

 (day) 



Depth 

 (ft) 



Specimens 



c b 

 Source 



Exposed 



Failed 



Copper, free 



102 



11 



75 



197 



2,340 



3 







CEL (4) 



Copper, free 



102 



11 



75 



402 



2,370 



3 







CEL (4) 



Be-Cu c 



170 



50 



30 



403 



6,780 



3 







NADC (7) 



Be-Cu 



170 



126 



75 



403 



6,780 



3 







NADC (7) 



Be-Cu 



170 



50 



30 



402 



2,370 



3 







NADC (7) 



Be-Cu 



170 



126 



75 



402 



2,370 



3 







NADC (7) 



Be-Cu 



172 ,V 



53 



30 



403 



6,780 



3 







NADC (7) 



Be-Cu 



172 rf 



133 



75 



403 



6,780 



3 







NADC (7) 



Be-Cu 



172 tf 



53 



30 



402 



2,370 



3 







NADC (7) 



Be-Cu 



\12 d 



133 



75 



402 



2,370 



3 







NADC (7) 



Be-Cu 



\ll e 



37 



30 



403 



6,780 



3 







NADC (7) 



Be-Cu 



\ll e 



93 



75 



403 



6,780 



3 







NADC (7) 



Be-Cu 



m e 



37 



30 



402 



2,370 



3 







NADC (7) 



Be-Cu 



172 e 



93 



75 



402 



2,370 



3 







NADC (7) 



Be-Cu 



175 



32 



30 



403 



6,780 



3 







NADC (7) 



Be-Cu 



175 



80 



75 



403 



6,780 



3 







NADC (7) 



Be-Cu 



175 



32 



30 



402 



2,370 



3 







NADC (7) 



Be-Cu 



175 



80 



75 



402 



2,370 



3 







NADC (7) 



"Copper Development Association alloy number. 

 Numbers refer to references at end of report. 

 c Beryllium-copper 

 rf Aged at 600°F 

 *Aged at 800°F 



60 



