Stress Corrosion Cracking of High and Low Strength Carbon Steels in Nitrate Solutions

CORROSION ◽  
1976 ◽  
Vol 32 (4) ◽  
pp. 117-120 ◽  
Author(s):  
AZIZ ASPHAHANI ◽  
H. H. UHLIG
Keyword(s):  
Carbon Content ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Carbon Steels ◽  
Corrosion Cracking ◽  
Heat Treated ◽  
Cold Rolled ◽  
Low Strength ◽  
Steel Heat ◽  
Nitrate Solutions

Abstract Stress corrosion cracking (SCC) behavior in 60% Ca(NO3)2, 3% NH4NO3 solution boiling at 110 C is reported for relatively pure 1% Ni, 1% Cr, or 1% Ti steels as a function of carbon content. The steels were water-quenched, cold-rolled, or furnace-cooled. Commercial 4140 steel heat-treated to various hardness levels was similarly tested. It was also subjected to SCC in boiling 3% NaNO3 and boiling 3% NaCl. Critical potentials below which SCC does not occur were measured in 3% NaNO3 for the latter steel at 4 hardness levels. The results are interpreted in terms of stress-sorption cracking.

Stress Corrosion Cracking of Carbon Steels In Concentrated Sodium Nitrate Solutions

CORROSION ◽  
1960 ◽  
Vol 16 (11) ◽  
pp. 557t-562t ◽  
Author(s):  
R. L. McGLASSON ◽  
W. D. GREATHOUSE ◽  
C. M. HUDGINS
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Sodium Nitrate ◽  
Carbon Steels ◽  
Corrosion Cracking ◽  
Nitrate Solutions

Stress corrosion cracking assessment of API X65 steel non-conventionally heat treated

2015 ◽  
Vol 67 (4) ◽  
pp. 352-360 ◽  
Author(s):  
C. Natividad ◽  
R. García ◽  
V. H. López ◽  
R. Galván-Martínez ◽  
M. Salazar ◽  
...  
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Corrosion Cracking ◽  
Heat Treated ◽  
Api X65 Steel ◽  
X65 Steel

scholarly journals Intergranular Corrosion and Stress Corrosion Cracking of Cold-Rolled Zircaloy-2.

1994 ◽  
Vol 43 (488) ◽  
pp. 551-555
Author(s):  
Hitoshi UCHIDA ◽  
Shozo INOUE ◽  
Kazuyuki MORIMOTO ◽  
Keiji KOTERAZAWA
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Intergranular Corrosion ◽  
Corrosion Cracking ◽  
Cold Rolled

Stress Corrosion Cracking of Low Strength, Low Alloy Nickel Steels in Sulfide Environments

CORROSION ◽  
1978 ◽  
Vol 34 (3) ◽  
pp. 88-96 ◽  
Author(s):  
A. K. DUNLOP
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Hydrate Formation ◽  
Corrosion Cracking ◽  
Beam Specimen ◽  
Stress Cracking ◽  
Partial Pressures ◽  
Sulfide Corrosion ◽  
Sulfide Stress ◽  
Low Strength

Abstract Factors governing stress corrosion cracking (SCC) of low strength, low alloy nickel steels (e.g., ASTM A203 Grade E) in sulfide environments were investigated using a three point loaded bent beam specimen. Cracking occurred in both weld and base metal at low H2S partial pressures (to 0.001 atmosphere) and stress levels, but could be inhibited by a neutralizing amine (morpholine) and methanol addition as used for control of ice and hydrate formation in cryogenic gas plants. Cathodic polarization experiments showed cracking was retarded under these conditions. This indicates the cracking phenomenon involved is not that of hydrogen embrittlement (i.e., sulfide stress cracking) as has been heretofore assumed, but involves localized anodic attack as does the cracking of other low strength alloys in environments such as nitrate, caustic, CO/CO2, etc. Sulfide corrosion stress cracking (SCSC) is suggested as a term for this type of localized anodic cracking attack in sulfide environments.

Review of Ferrite Number (FN) Requirements and Proposed Changes to Code Case N-504-4 and Nonmandatory Appendix Q

2019 ◽  
Author(s):  
Steven L. McCracken ◽  
David Segletes
Keyword(s):  
Stainless Steel ◽  
Weld Metal ◽  
Carbon Content ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Nuclear Power ◽  
Nuclear Regulatory Commission ◽  
Corrosion Cracking ◽  
Delta Ferrite ◽  
Ferrite Number

Abstract ASME Section XI Nonmandatory Appendix Q and Code Case N-504-4 are routinely used to install full structural weld overlays in the nuclear power industry for repair or mitigation of stress corrosion cracking in austenitic stainless steel weldments. Both Appendix Q and N-504-4 specify a Ferrite Number (FN) and carbon content requirement for the stainless steel weld metal used for the weld overlay to ensure acceptable resistance to stress corrosion cracking. The Ferrite Number (FN) is used in the ASME Code for establishing the delta ferrite content in the deposited weld metal. Field experience indicates there is often confusion and differing opinion concerning how the Ferrite Number and carbon content requirements of Appendix Q and N-504-4 are satisfied. This is in part due to unavailability of the original technical basis for these requirements. This paper provides a background for the delta ferrite and carbon content requirements, information on influence of delta ferrite and carbon content on stress corrosion cracking and U.S. Nuclear Regulatory Commission (NRC) guidance on the issue. Finally, this paper details a proposed revision of Nonmandatory Appendix Q and N-504-4 to clarify the FN and carbon content requirements.

Stress Corrosion Cracking of Depleted Uranium Alloys in Moist Salt Ladened Air

CORROSION ◽  
1981 ◽  
Vol 37 (2) ◽  
pp. 81-88 ◽  
Author(s):  
D. F. Hasson ◽  
J. A. Joyce ◽  
C. R. Crowe
Keyword(s):  
Stress Corrosion ◽  
Crack Growth ◽  
Stress Corrosion Cracking ◽  
Corrosion Cracking ◽  
Depleted Uranium ◽  
Computer Data ◽  
Computer Data Acquisition ◽  
Heat Treated ◽  
Threshold Data ◽  
Mixed Fracture

Abstract Stress corrosion cracking (SCO in selected depleted uranium alloys in salt ladened moist air environments has been studied by cantilever beam testing. Crack growth kinetics were monitored during the test using a computer data acquisition system. Continuous measurements of crack growth with time showed discontinuous crack growth with increasing KI. Threshold stress intensity values for stress corrosion cracking KISCC, were found to be 24.4 MPa - m½ and 15.6 MPa - m½ for U-3/4 Ti and DU-3/4 Quintalloys, respectively. Values for U-2 Mo in two heat treated conditions were slightly less than the U-3/4 Ti threshold. Data is presented in a “safe zone” plot of flaw size vs applied stress. Fractographic investigation by scanning electron microscopy revealed mixed fracture modes with both transgranular and intergranular fracture occurring.

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