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October 10, 2025

Stress Relaxation Cracking (SRC) Susceptibility Analysis in UNS S34751 Stainless Steel Weld Microstructures for Petrochemical Piping Applications

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Authors

TPTimothy PickleJPJorge PensoZYZhenzhen Yu

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Overview

This analysis compares SRC susceptibility in UNS S34751 and UNS S34709 welds, highlighting significant differences. It suggests implications for pipeline applications under varying conditions.

Key Points

  • Initial results indicate better SRC resistance in UNS S34751 compared to UNS S34709 at elevated temperatures.
  • Testing revealed more effective thermomechanical properties in UNS S34751 welds than those using UNS S34709.
  • A comparative analysis on weld filler choices demonstrated varying SRC susceptibility in both materials.
  • Microstructural examination of weld zones showed critical disparities influencing cracking behavior under stress.

Cite This Study

Pickle et al. (2025) studied this question.

synapsesocial.com/papers/68e8619c7ef2f04ca37e43a8https://doi.org/10.1115/pvp2025-153141
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