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96060 SULFIDE STRESS CORROSION CRACKING RESISTANCE OF LOW CR STEEL

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Product Number: 51300-96060-SG
ISBN: 96060 1996 CP
Author: Mitsuo Kimura, Yoshihiro Kataoka, Yoshitimli Nakano
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The sulfide stress corrosion cracking resistance of low Cr Steels was investigated to clarify the application limit in sour environment. The SSC threshold stress of the 0.5%Cr pipe was 95% SMYS which is the same as the Cr-free one. The SSC critical hardness of the 0.5%Cr pipe was about Hv 250 in the 3.000 ppm H2S solution and increased with the decrease in H2S content. The KISSC value of the 0.5%Cr pipe was newly equal to the Cr-free one. The SSC resistance ot the 0.5% Cr pipe was same as the sour resistant Cr-free pipe. The hydrogen permeation rate of the Cr bearing steel was slightly lower than that of the Cr-free steel. This fact is attributed to the difference in corrosion film created on the corrosion surface. The Iinepipe steel with the Cr content of 0.5 % proved to have sulfide stress corrosion cracking resistance as Iarge as the sour resistant Iinepipe steel. Keywords: Sulfide stress corrosion cracking (SSC), Hydrogen induced cracking (HIC), Linepipe, Chromium, Hydrogen sulfide.
The sulfide stress corrosion cracking resistance of low Cr Steels was investigated to clarify the application limit in sour environment. The SSC threshold stress of the 0.5%Cr pipe was 95% SMYS which is the same as the Cr-free one. The SSC critical hardness of the 0.5%Cr pipe was about Hv 250 in the 3.000 ppm H2S solution and increased with the decrease in H2S content. The KISSC value of the 0.5%Cr pipe was newly equal to the Cr-free one. The SSC resistance ot the 0.5% Cr pipe was same as the sour resistant Cr-free pipe. The hydrogen permeation rate of the Cr bearing steel was slightly lower than that of the Cr-free steel. This fact is attributed to the difference in corrosion film created on the corrosion surface. The Iinepipe steel with the Cr content of 0.5 % proved to have sulfide stress corrosion cracking resistance as Iarge as the sour resistant Iinepipe steel. Keywords: Sulfide stress corrosion cracking (SSC), Hydrogen induced cracking (HIC), Linepipe, Chromium, Hydrogen sulfide.
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