In this paper a collection of test results of the behaviour of mechanical properties of different steel grades at elevated temperatures is presented. The tests have been carried out at Helsinki University of Technology during the past about 10 years. The aim of Ihese tests have been to evaluate the accuracy of existing design values for the mechanical properties of structural steel and to support different other research projects aimed at studying the behaviour of steel or composite structures in fire. The results are presented with a comparison to the European design standard for structural fire design of steel structures EN 1993-1-21, which is already officially accepted standard in the EU countries and certainly will be largely in use in the near future.
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