This report describes an investigation of the susceptibilities of high-strength controlled-rolled line pipe steels to hydrogen stress cracking (HSC) and the effect of long-term cathodic charging with hydrogen on their mechanical properties. Studies of the susceptibility of higher strength, controlled rolled steels to hydrogen-stress cracking and of the effect of longtime cathodic charging with hydrogen on the mechanical properties of those steels were conducted. Because of the occurrence of these failures, studies were conducted to determine the maximum strength level of steel that could be used...
This report describes an investigation of the susceptibilities of high-strength controlled-rolled line pipe steels to hydrogen stress cracking (HSC) and the effect of long-term cathodic charging with hydrogen on their mechanical properties. Studies of the susceptibility of higher strength, controlled rolled steels to hydrogen-stress cracking and of the effect of longtime cathodic charging with hydrogen on the mechanical properties of those steels were conducted. Because of the occurrence of these failures, studies were conducted to determine the maximum strength level of steel that could be used for natural gas transmission pipe cathodically protected in the soil without encountering HSC failures.