Behaviour of Structural Carbon Steel at High Temperatures

The research develops an experimental study on two carbon steels used for construction of structures on civil works, S355NL and S460NL, to high temperatures with values ranging between 500 °C and 950 °C. In order to obtain experimental evidence of behavior of steels at elevated temperatures, the chemical and structural characterizations and tested steels were made, deducing the found microstructures and average grain sizes measured. Tensile tests at elevated temperatures were made and steels mechanical properties were deducted at different temperatures. Also hardness steels tests were made. Creep and plastic deformation phenomena were observed from micrography and fractography studies.