What question did this study set out to answer?

The aim is to evaluate how different MAG welding parameters affect the mechanical properties of API 5L X70 pipeline steel in hydrogen environments.

March 29, 2026ProcessesOpen Access

Effect of Automated Multi-Pass MAG Welding Parameters on the Fracture Toughness and Hydrogen Embrittlement Susceptibility of API 5L X70 Pipeline Steel

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The aim is to evaluate how different MAG welding parameters affect the mechanical properties of API 5L X70 pipeline steel in hydrogen environments.
Conducted microstructural examinations of welds
Performed hardness measurements on welded joints
Executed slow strain rate testing in high-pressure hydrogen
Carried out fracture toughness testing under hydrogen exposure
Moderate reduction in ductility in hydrogen environments, with reduction of area decreasing to 69.1% and 71.5% from 81.2% in nitrogen
Ultimate tensile strength remained largely unaffected, measuring 609 and 597 MPa in hydrogen versus 579 MPa in nitrogen
Fracture toughness values exceeded the acceptance threshold, measured at 58–59 MPa√m in the weld and 57–61 MPa√m in the heat-affected zone

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Implication

Investigates the effects of MAG welding on fracture toughness in pipeline steel under hydrogen environments, indicating critical safety considerations.

Cite This Study

Ćorić et al. (2026) studied this question.

synapsesocial.com/papers/69c8c3cede0f0f753b39ecbd https://doi.org/10.3390/pr14071069

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Implication

Investigates the effects of MAG welding on fracture toughness in pipeline steel under hydrogen environments, indicating critical safety considerations.

Effect of Automated Multi-Pass MAG Welding Parameters on the Fracture Toughness and Hydrogen Embrittlement Susceptibility of API 5L X70 Pipeline Steel

Key Points

Discussion

Implication

Cite This Study

Effect of Automated Multi-Pass MAG Welding Parameters on the Fracture Toughness and Hydrogen Embrittlement Susceptibility of API 5L X70 Pipeline Steel

Key Points

Discussion

Implication

Cite This Study

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