Table 7. Continued. 



Alloy 



Stress 

 (ksi) 



Percent 



Yield 



Strength 



Exposure 

 (day) 



Depth 

 (ft) 



Number of 



Specimens 



Exposed 



Number 

 Failed 



c a 



Source 



18% Ni, maraging, Cu plated' 



188 



75 



197 



2,340 



3 







NADC (7) 



18% Ni, maraging, Ni plated-' 



188 



75 



197 



2,340 



3 







NADC (7) 



18% Ni, maraging. 



188 



75 



402 



2,370 



3 



3 



NADC (7) 



18% Ni, maraging-' 



188 



75 



402 



2,370 



3 



3 



NADC (7) 



18% Ni, maraging 



109 



35 



402 



2,370 



3 







CEL (4) 



18% Ni, maraging 



156 



50 



402 



2,370 



3 







CEL (4) 



18% Ni, maraging . 



234 



75 



402 



2,370 



3 







CEL (4) 



18% Ni, maraging^ 



109 



35 



402 



2,370 



3 







CEL (4) 



18% Ni, maraging'. 



156 



50 



402 



2,370 



3 







CEL (4) 



18% Ni, maraging^ 



234 



75 



402 



2,370 



3 







CEL (4) 



12% Ni, maraging 



63 



35 



197 



2,340 



3 







Boeing (6) 



12% Ni, maraging 



90 



50 



197 



2,340 



3 







Boeing (6) 



12% Ni, maraging 



135 



75 



197 



2,340 



3 







Boeing (6) 



"Numbers refer to references at end of report. 



One specimen failed in bottom sediment, two in water. 

 C HSLA = high-strength, low-alloy steel. 



Zinc-rich primer, 8 mils, 

 ''zinc-rich primer, 8 mils plus wash primer (MIL-C-8514), 6 mils plus epoxy topcoat, 6 mils. 

 •^Epoxy tar primer, 8 mils plus epoxy topcoat, 8 mils. 

 ^HS = high-strength steel. 



Exposed in bottom sediment. 

 'TIG welded. 

 ^Cracked at edge of heat affected zone. 



37 



