AUTOCLAVE TESTING OF TYPE 430 STAINLESS STEEL. TASK I, PHASE 2-b
BS>Type 430 stainless steel U-bend specimens are not susceptible to stress corrosion cracking when stressed and exposed to an enviroment containing up to 100% O/sub 2/, chloride concentrations to 1,100 ppm Cl, pH adjusted to 11.5 with NaOH, a temperature of 400 deg F, and periods up to 1,176 hours in a rocker- type autoclave. Additionally, cracking did not occur under the severe exposure of Type 430 stainless steel U-bend specimens subjected to magnesium chloride at 1,030 ppm as Cl. Further, Type 430 stainless steel is susceptible to pit corrosion under centain environmental conditions typified by a greater than 100 ppm Cl concentration combined with about 20% oxygen. The pitting corrosion is a typical chloride attack. Therefore, the modified alloy, Croloy 16-1, with its increased nickel content will resist stress corrosion cracking under these test conditions and it also may not suffer pitting corrosion. It has previously been shown that stress corrosion cracking of Type 430 does occur in certain environmental conditions which usually include low pH. (auth)
- Research Organization:
- Martin Co. Nuclear Div., Baltimore
- NSA Number:
- NSA-13-004708
- OSTI ID:
- 4279459
- Report Number(s):
- MND-E-1602
- Country of Publication:
- United States
- Language:
- English
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