Stress-Corrosion Cracking of Type 347 Stainless Steel And Other Alloys in High Temperature Water

Journal Article · Tue Oct 01 00:00:00 EDT 1963 · Corrosion (Houston)

DOI:https://doi.org/10.5006/0010-9312-19.10.345· OSTI ID:4629902

NEUMANN, P. D.; GRIESS, J. C.

An extensive study was conducted on the susceptibility of Type 347 stainless steel to stress-corrosion cracking in high temperature water over wide ranges of chloride concentration, temperature, oxygen concentration, and pH. No cracking was observed at a chloride concentration of 5 ppm, but cracks were observed at 10 ppm and higher at temperatures of 100 deg C and above. Maximum susceptibility was found between 150 and 250 deg C, but no cracking was found below 100 deg C. No pH effect was noted. Various heat treatments and surface preparations showed no appreciable effect. Nickel plating, even with only partial covering of the surface, was found to inhibit stress-corrosion cracking completely while chromate and phosphate in solution were effective only at high concentrations. Five other austenitic stainless steels were similar in behavior to Type 347 stainless steel, and three ferritic stainless steels exhibited only slightly better resistance to cracking. Of five high nickel, high chromium alloys tested, only Inconel exhibited complete immunity to stress-corrosion cracking. Cast chromium-nickel stainless steels were found to be extremely resistant to stress-corrosion cracking as long as they were not subjected to cold- working or plastic deformation. Once stressed above the yield, the resistance to cracking could not be regained by annealing. A number of the alloys tested in high temperature water were also tested in boiling 32% MgCl₂. It was found that the susceptibility of an alloy to stress-corrosion cracking in boiling 42% MgCl₂ solution is not necessarily a measure of its susceptibility in high temperature water containing relatively small concentrations of chloride ion.

• Research Organization: Oak Ridge National Lab., Tenn.
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-041380
• OSTI ID: 4629902
• Journal Information: Corrosion (Houston), Journal Name: Corrosion (Houston) Journal Issue: 10 Vol. 19; ISSN 0010-9312
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACIDITY
ALUMINUM ALLOYS
ANNEALING
AUSTENITE
BOILING
CASTING
CHLORIDES
CHROMIUM ALLOYS
CHROMIUM OXIDES
COLD WORKING
CORROSION
CRACKS
DEFORMATION
FERRITES
HEAT TREATMENTS
IONS
MAGNESIUM CHLORIDES
MEASURED VALUES
NICKEL
NICKEL ALLOYS
NIOBIUM ALLOYS
OXYGEN
PHOSPHATES
PLATING
PREPARATION
QUANTITY RATIO
SOLUTIONS
STABILITY
STAINLESS STEELS
STRESSES
SURFACES
TEMPERATURE
TITANIUM ALLOYS
WATER