International Journal of Steel Structures

, Volume 19, Issue 6, pp 1951–1968 | Cite as

Estimation of the Strength Coefficient and Strain Hardening Exponent from Monotonic Tensile Properties of Steels

  • Jing LiEmail author
  • Yuan-ying Qiu
  • Hai-dong Wang
  • Zhao-xi Wang


In order to derive a method for estimating the strength coefficient and strain hardening exponent of steel, the performance parameters of 86 kinds of steel taken from American Iron and Steel Institute (AISI) Bar Steel Fatigue Database were examined and equations that related the strength coefficient and strain hardening exponent to the ultimate tensile strength and yield strength were developed. Correlations from the literature among the strength coefficient, strain hardening exponent and other monotonic tensile properties were also examined and compared to the relationships proposed in this study using the data of 86 kinds of steel. The proposed method was shown to be better used to estimate the strength coefficient and strain hardening exponent.


Strength coefficient Strain hardening exponent Steels Theoretical estimation Monotonic tensile properties 



The authors would like to thank Prof. Z.P. Zhang and Dr. C.W. Li for providing the program code of Zhang’s method. The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (No. 51601221), the Fundamental Research Funds for the Central Universities (No. JB180402), and the Natural Science Basic Research Plan in Shaanxi Province of China (No. 2019JQ-353).

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Korean Society of Steel Construction 2019

Authors and Affiliations

  1. 1.School of Mechatronic EngineeringXidian UniversityXi’anChina
  2. 2.Shanghai Spaceflight Precision Machinery Research InstituteShanghaiChina

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