Author(s): , ,

Keywords: , , , , , , , , , ,

Abstract: High-strength steel used in bolts was tested for its thermo-physical properties in order to determine how steel bolts would respond in a fire. It was determined that the thermal and mechanical properties of the steel were dependent on temperature, and that the thermal conductivity of the steel was also dependent on carbon content. The thermal conductivity of the three types of steel that were tested was found to be the same at a given temperature in both the heating and cooling phases of a fire. Significant thermal strain was observed in all three types of steel at elevated temperatures. There was no significant change in the yield and ultimate strength of the steel samples at temperatures up to 400oC, but above this temperature, both properties decreased rapidly. 

Reference: Journal of Materials in Civil Engineering, 24, 6 (2012) 765-774

DOI: 10.1061/(ASCE)MT.1943-5533.0000445