Journal of Materials Engineering and Performance

, Volume 8, Issue 5, pp 606–612

Microstructure and properties of nippon fire-resistant steels

  • W. Sha
  • F. S. Kelly
  • Z. X. Guo
Article

DOI: 10.1007/s11665-999-0017-3

Cite this article as:
Sha, W., Kelly, F.S. & Guo, Z.X. J. of Materi Eng and Perform (1999) 8: 606. doi:10.1007/s11665-999-0017-3
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Abstract

The microstructure and mechanical properties of two fire-resistant steels manufactured by Nippon Steel were investigated. Microstructural observation was carried out using optical microscopy, transmission electron microscopy (TEM), and scanning electron microscopy (SEM). It was found that the good hightemperature strength and creep properties of these steels are due to the high lattice-friction stresses, which are a result of the very fine distribution of metal carbide (MC) precipitates and molybdenum in solid solution. In addition, a strong secondary wave of precipitation at approximately 650 °C was observed. This lattice friction stress maintained strength up to 600 °C.

Keywords

creep fire resistant microstructure steel strength 

Copyright information

© ASM International 1999

Authors and Affiliations

  • W. Sha
    • 1
  • F. S. Kelly
    • 2
  • Z. X. Guo
    • 3
  1. 1.School of Civil EngineeringQueen’s University of BelfastBelfastUK
  2. 2.Peter Brett AssociatesBridge StudiosLondonUK
  3. 3.Department of MaterialsQueen Mary and Westfield CollegeLondonUK

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