Peak Cyclic Stress and Ratcheting Response of a Low Alloy Steel for Reactor Pressure Vessel Applications

Gupta, Chandni

doi:10.1007/s11661-023-06995-0

Cited by 1 publication

(1 citation statement)

References 43 publications

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“…Currently, the increasing demand for oil and natural gas promotes active attention to pressure vessels which are important equipment for the separation, storage, and transportation of oil and natural gas in the energy industry [1][2][3][4]. Steel is one of the most commonly used materials for the production of pressure vessels [5][6][7]. Among those steels used for pressure vessels, Q345 steel, available in China, is a typical low carbon and low alloy hot-rolled steel with moderate yield and tensile strength that is extensively used in lowand medium-pressure vessels owing to its low cost (free of the precious alloy elements) and decent tensile strength (ultimate tensile strength (UTS) of ~470 MPa, yield strength (YS) of ~345 MPa) [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Enhancement of Strength and Sulfide Stress Cracking Resistance of Hot-Rolled Pressure Vessel Steel Q345 via a Quenching and Tempering Treatment

Zhang,

Zhao,

Tian

et al. 2024

Materials

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Sulfide stress cracking (SSC) failure is a main concern for the pressure vessel steel Q345 used in harsh sour oil and gas environments containing hydrogen sulfide (H2S). Methods used to improve the strength of steel usually decrease their SSC resistance. In this work, a quenching and tempering (Q&T) processing method is proposed to provide higher strength combined with better SSC resistance for hot-rolled Q345 pressure vessel steel. Compared to the initial hot-rolled plates having a yield strength (YS) of ~372 MPa, the Q&T counterparts had a YS of ~463 MPa, achieving a remarkable improvement in the strength level. Meanwhile, there was a resulting SSC failure in the initial hot-rolled plates, which was not present in the Q&T counterparts. The SSC failure was not only determined by the strength. The carbon-rich zone, residual stress, and sensitive hardness in the banded structure largely determined the susceptibility to SSC failure. The mechanism of the property amelioration might be ascribed to microstructural modification by the Q&T processing. This work provides an approach to develop improved strength grades of SSC-resistant pressure vessel steels.

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