Table 13. Changes in Mechanical Properties of Coppers Due to Corrosion 





CDA 



No." 



Exposure 

 (day) 



Depth 

 (ft) 



Tensile 



Strength 



Yield Strength 



Elon 



Ration 





Alloy 



Original 

 (ksi) 



% Change 



Original 

 (ksi) 



% Change 



Original 

 (%) 



% Change 



Source'' 



Copper, O free 



102 



123 



5,640 



33 



+2 



14 



-6 



52 



-2 



CEL (4) 



Copper, O free 



102 



403 



6,780 



33 







14 



+9 



52 



-6 



CEL (4) 



Copper, O free 



102 



751 



5,640 



33 



+4 



14 



+ 11 



52 



-6 



CEL (4) 



Copper, O free 



102 



197 



2,340 



33 



-8 



14 



-18 



52 



-4 



CEL (4) 



Copper, O free 



102 



402 



2,370 



33 



+ 2 



14 



+4 



52 



-7 



CEL (4) 



Copper, free 



102 



181 



5 



33 



+4 



14 



+20 



52 



-14 



CEL (4) 



Be-Cu 17 



170 



123 



5,640 



188 







167 







5 







NADC (7) 



Be-Cu 



170 



751 



5,640 



188 



-2 



167 



_2 



5 



-6 



NADC (7) 



Be-Cu 



170 



197 



2,340 



188 



+ 11 



167 



+ 10 



5 



+ 4 



NADC (7) 



Be-Cu 



170 



402 



2,370 



188 



-7 



167 



-6 



5 







NADC (7) 



Be-Cu 



172 



402 



2,370 



176 



-9 



162 



-8 



4 



-14 



CEL (4) 



Be-Cu** 



172 



402 



2,370 



161 



-5 



158 



-2 



3 



+ 18 



CEL (4) 



Be-Cu 17 



172 



402 



2,370 



166 



-1 



162 



-6 



3 



-17 



CEL (4) 



Be-Cu 



172 



181 



5 



176 



-7 



162 



-6 



4 



-29 



CEL (4) 



Be-Cu d 



172 



181 



5 



158 



+ 3 



157 



-1 



4 



-29 



CEL (4) 



Be-Cu* 7 



172 



181 



5 



166 



+ 3 



162 



-4 



3 



-17 



CEL (4) 



Be-Cu/ 



172 



123 



5,640 



196 







177 







4 







NADC (7) 



Be-Cu/ 



172 



751 



5,640 



196 



-1 



177 



-2 



4 



-19 



NADC (7) 



Be-Cu/ 



172 



197 



2,340 



196 







177 







4 







NADC (7) 



Be-Cu/ 



172 



402 



2,370 



196 



-8 



177 



-13 



4 



-26 



NADC (7) 



Be-Cu? 



172 



123 



5,640 



144 



-2 



124 



-7 



9 







NADC (7) 



Be-Cu? 



172 



751 



5,640 



144 



-4 



124 



-10 



9 



+26 



NADC (7) 



Be-Cu? 



172 



197 



2,340 



144 



+6 



124 



+ 10 



9 



+25 



NADC (7) 



Be-Cu? 



172 



402 



2,370 



144 



-6 



124 



-12 



9 



+26 



NADC (7) 



Be-Cu 



175 



123 



5,640 



121 







107 







15 



-20 



NADC (7) 



Be-Cu 



175 



751 



5,640 



121 



-4 



107 







15 



-13 



NADC (7) 



Be-Cu 



175 



197 



2,340 



121 







107 







15 







NADC (7) 



Be-Cu 



175 



402 



2,370 



121 



-3 



107 







15 



-23 



NADC (7) 



Copper Development Association alloy numbe 



Numbers refer to references at end of report. 



Beryllium-copper. 



MIG welded. 

 e TIG welded. 

 /Aged at 600° F. 

 ? Aged at 800° F. 



61 



