S500M and Grade 70 Steel Grades—Material Properties Assessed through Full Scale Tests

Abstract

This paper presents two experimental fire tests performed at the University of Liege in the scope of an internal project supported by ArcelorMittal Global R&D and focused on the fire resistance of S460M and S500M steel grades at high temperatures. Two similar beams have respectively been subjected to fast (standard ISO curve) and slow (fixed 5°C/min heating rate) elevations of temperature under a mechanical loading kept constant. The objective of these fire tests is to provide data on the resistance of S460M and S500M steel grades in the critical temperature range [500 °C; 700 °C] through full scale tests. A comparison between the reduction factors obtained from experimental tests and those defined in European and American standards [1,2] will allow confirming that reduction factors defined in these standards also apply to S500M and Grade 70 steel grades.