Table 37. Continued. 



Alloy 



r- J 1 



Environment 



Exposure 

 (day) 



Depth 

 (ft) 



Corrosion 



Source 



Rate 

 (mpy) 



Maximum 

 Pit Depth 



(mils) 



Crevice 

 Depth fo 

 (mils) 



Type 



AISI 202 

 AISI 202 

 AISI 202 

 AISI 202 

 AISI 202 

 AISI 202 

 AISI 202 

 AISI 202 



W 



S 

 W 

 S 



W 



s 



w 

 w 



1,064 

 1,064 

 197 

 197 

 402 

 402 

 182 

 366 



5,300 

 5,300 



2,340 

 2,340 

 2,370 

 2,370 

 5 

 5 



<0.1 

 <0.1 

 <0.1 

 <0.1 

 <0.1 

 <0.1 

 0.6 

 0.5 





 

 

 

 17 

 50 

 50 





 50 



I 



I 

 17 





 50 

 50 



NC 



C(PR) 



I-C 



I-C 



C 



P 



C(PR);P (PR) 



C (PR);P (PR) 



INCO (3) 

 INCO (3) 

 INCO (3) 

 INCO (3) 

 INCO (3) 

 INCO (3) 

 INCO (3) 

 INCO (3) 



W = Totally exposed in seawater on sides of structure; S = Exposed in base of struct 

 portions of the specimen were embedded in the bottom sediments. 



Symbols for types of corrosion: 



c 



= Crevice 



I 



= Incipient 



NC 



= No visible corrosion 



P 



= Pitting 



PR 



= Perforated 



S 



= Severe 



WB 



= Weld bead 



"Numbers refer to references at end of report. 

 ^Welded. 



Table 38. Stress Corrosion of 200 Series Stainless Steels 



Alloy 



Stress 

 (ksi) 



Percent 



Yield 

 Strength 



Exposure 



(day) 



Depth 

 (ft) 



Number of 

 Specimens 

 Exposed 



Number 

 Failed 



Source 



AISI 201 



AISI 201 



AISI 201, sensitized 



AISI 201 



AISI 201 



AISI 201, sensitized 



AISI 201 



AISI 201 



AISI 201, sensitized 



AISI 201, sensitized 



22 

 55 

 55 

 22 

 55 

 55 

 22 

 55 

 22 

 55 



30 



75 • 



75 



30 



75 



75 



30 



75 



30 



75 



403 

 403 

 403 

 197 

 197 

 197 

 402 

 402 

 402 

 402 



6,780 

 6,780 



6,780 

 2,340 

 2,340 

 2,340 

 2,370 

 2,370 

 2,370 

 2,370 



3 

 3 

 3 

 3 

 3 

 3 

 3 

 3 

 3 

 3 





 

 

 

 

 

 

 

 

 



NADC (7) 

 NADC (7) 

 NADC (7) 

 NADC (7) 

 NADC (7) 

 NADC (7) 

 NADC (7) 

 NADC (7) 

 NADC (7) 

 NADC (7) 



Numbers refer to references at end of report. 



137 



