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High Temperature Mechanical Properties of High Strength Structural Steels Q550, Q690 and Q890



Lei Huang, Guo-Qiang Li, Xin-XIn Wang, Chao Zhang, Lisa Choe, Michael Engelhardt


This paper reports the results of an experimental study on high temperature mechanical properties of high strength structural steel (HSSS) produced in accordance with Chinese materials standards. Steady-state tensile coupon tests were carried out on specimens made of China grade steels of Q550, Q690 and Q890. Nine elevated temperature levels up to 800 $^\circ}$C were considered. The elastic modulus, yield strength, ultimate strength and ultimate strain were derived from the measured stress-strain curves. A model was developed to predict the high temperature properties of these steels using an approach developed by the National Institute of Standards and Technology (NIST) and by calibrating the model parameters to the test data. The test results are compared to other tests on high strength steels reported in literature. The test results also compared to predictions of high temperature properties from various building codes and other standards.
Fire Technology


High strength structural steel (HSSS), High temperature mechanical properties, Steady state tensile coupon test, NIST stress strain model, Experimental study, Modal calibration, Structural fire safety design, Q550, Q690, Q890


Huang, L. , Li, G. , Wang, X. , Zhang, C. , Choe, L. and Engelhardt, M. (2018), High Temperature Mechanical Properties of High Strength Structural Steels Q550, Q690 and Q890, Fire Technology, [online], (Accessed April 14, 2024)
Created July 19, 2018, Updated October 12, 2021