Table 53. Chemical Compositions of Miscellaneous Stainless Steels, Percent by Weight 



Alloy 



C 



Mn 



P 



S 



Si 



Ni 



Cr 



Mo 



Cu 



Other 



Fe 



c b 

 Source 



20 Cb 



0.04 



0.79 



0.018 



0.004 



0.67 



28.38 



19.80 



2.06 



3.11 



0.77 Cb + Ta 



R 



CEL (4) 



20 Cb 



0.05 



0.82 



- 



- 



0.70 



28.43 



20.09 



2.32 



3.37 



0.83 Cb + Ta 



R 



CEL (4) 



20 Cb 



- 



- 



- 



- 



" 



33.0 



20.0 



2.5 



3.5 



- 



R 



INCO (3) 



20 Cb-3 C 



0.07 



2.0 



0.035 



0.035 



1.0 



34.0 



20.0 



2.5 



3.5 



Cb + Ta, 8XC 



R 



CEL (4) 



20Cb-3 



- 



- 



- 



- 



- 



34.0 



20.0 



2.3 



3.4 



- 



R 



INCO (3) 



Ni-Cr-Cu-Mo No. 1, cast 



- 



- 



- 



- 



- 



30.0 



20.0 



2.5 



4.0 



- 



R 



INCO (3) 



Ni-Cr-Cu-Mo No. 2, cast 



- 



- 



- 



- 



- 



30.0 



20.0 



2.5 



3.5 



- 



R 



INCO (3) 



Ni-Cr-Mo, cast 



- 



- 



- 



- 



- 



24.0 



19.0 



3.0 



- 



- 



R 



INCO (3) 



Ni-Cr-Mo-Si, cast 



- 



- 



- 



- 



1.0 



23.0 



21.0 



5.0 



- 



- 



R 



INCO (3) 



RL-3 5-100, cast 



" 



1.0 





- 



- 



31.0 



23.0 



9.0 



- 



- 



R 



INCO (3) 



R = remainder. 



Numbers refer to references at end of report. 

 Typical analysis. 



Table 54. Corrosion Rates and Types of Corrosion of Miscellaneous Stainless Steels 



Alloy 



Environment 



Exposure 

 (day) 



Depth 

 (ft) 



Corrosion 



Source 



Rate 

 (mpy) 



Maximum 



Pit Depth 



(mils) 



Crevice 

 Depth* 

 (mils) 



Type* 



20 Cb 



W 



123 



5,640 















NC 



CEL (4) 



20 Cb 



S 



123 



5,640 















NC 



CEL (4) 



20 Cb 



W 



403 



6,780 















NC 



CEL (4) 



20 Cb 



S 



403 



6,780 



<0.1 







102 



C 



CEL (4) 



20 Cb 



W 



751 



5,640 



<0.1 







26 



c 



CEL (4) 



20 Cb 



S 



751 



5,640 















NC 



CEL (4) 



20 Cb 



W 



1,064 



5,300 















NC 



CEL (4) 



20 Cb 



S 



1,064 



5,300 















NC 



CEL (4) 



20 Cb 



W 



197 



2,340 



<0.1 







I 



1-C 



CEL (4) 



20 Cb 



S 



197 



2,340 



<0.1 







1 



I-C 



CEL (4) 



20 Cb 



w 



402 



2,370 



<0.1 











NC 



CEL (4) 



20 Cb 



s 



402 



2,370 



<0.1 











NC 



CEL (4) 



20 Cb 



w 



181 



5 



<0.1 







5 



C;SL-E 



CEL (4) 



20 Cb 



w 



398 



5 



<0.1 



14 







SL-E; P 



CEL (4) 



20 Cb 



w 



540 



5 



<0.1 



24 







P 



CEL (4) 



20 Cb 



w 



588 



5 



<0.1 







21 



C 



CEL (4) 



20 Cb-3 



w 



123 



5,640 



<0.1 











NC 



INCO (3) 



20 Cb-3 



s 



123 



5,640 



<0.1 











NC 



INCO (3) 



20 Cb-3 



w 



189 



5,900 



<0.1 



I 



I 



l-C; 1-P 



CEL (4) 



20 Cb-3 



s 



189 



5,900 



<0.1 







40 



C 



CEL (4) 



181 



