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51316-7592-Effect of ppb Levels of Chloride on the Stress Corrosion Cracking of Pressure Vessel Steel

Picture for Effect of ppb Levels of Chloride on the Stress Corrosion Cracking of Pressure Vessel Steel
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Product Number: 51316-7592-SG
ISBN: 7592 2016 CP
Author: Xiaoyuan Lou
Publication Date: 2016
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This talk covers the results from a 4-year program of evaluating the effect of very low levels of chloride (< 5ppb) on the stress corrosion cracking (SCC) behavior of low-alloy pressure vessel steel (A533B) in high temperature water. Three different heats of low alloy steel from reactor vessels were evaluated under both periodical partial unloading condition and constant load/K condition. Effects of chloride (1-5 ppb) stress intensity factor (K) specimen orientation and hydrogen chemistry were studied in detail. It was found that the compositional percentage of sulfur is a weak measure of SCC susceptibility under ppb level of chloride. The potential reason that may cause heat-to-heat difference on SCC suscetibility will also be discussed. The result from this program suggests that the chloride level as low as 2-4 ppb can increase the SCC susceptibility of low alloy steel in BWR environment.
This talk covers the results from a 4-year program of evaluating the effect of very low levels of chloride (< 5ppb) on the stress corrosion cracking (SCC) behavior of low-alloy pressure vessel steel (A533B) in high temperature water. Three different heats of low alloy steel from reactor vessels were evaluated under both periodical partial unloading condition and constant load/K condition. Effects of chloride (1-5 ppb) stress intensity factor (K) specimen orientation and hydrogen chemistry were studied in detail. It was found that the compositional percentage of sulfur is a weak measure of SCC susceptibility under ppb level of chloride. The potential reason that may cause heat-to-heat difference on SCC suscetibility will also be discussed. The result from this program suggests that the chloride level as low as 2-4 ppb can increase the SCC susceptibility of low alloy steel in BWR environment.
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51317--9518-Chloride Stress Cracking of an Austenitic Stainless Steel Pipe Fitting in a Hydroprocessing Unit

Product Number: 51317--9518-SG
ISBN: 9518 2017 CP
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