Journal of Failure Analysis and Prevention

, Volume 9, Issue 1, pp 16–22 | Cite as

Failure Investigation of a Furnace Tube Support

  • A. M. Babakr
  • A. Al-Ahmrai
  • K. Al-Jumayiah
  • F. Habiby
Case History---Peer-Reviewed


A furnace tube support failed after 6 months service at 850 °C. The support was an HK alloy, a member of the heat-resistant cast alloy family (H-Series) steels. The H-series steels are widely used in the petrochemical industry for components requiring enhanced high-temperature properties. Microstructural changes occurring at high temperature clearly affect the mechanical properties. The property degradation in HK-40 steel furnace tube support subjected to high temperature was caused by the formation of sigma phase. The investigation included metallurgical analysis, materials characterization, and mechanical analysis.


Sigma phase Corrosion Microstructure Heat-resistant steels Hardness 


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Copyright information

© ASM International 2008

Authors and Affiliations

  • A. M. Babakr
    • 1
  • A. Al-Ahmrai
    • 1
  • K. Al-Jumayiah
    • 1
  • F. Habiby
    • 1
  1. 1.Saudi Basic Industries Corporation (SABIC)SABIC Technology Center-JubailAl-JubailSaudi Arabia

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