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Faculty of Engineering and Natural Sciences, University of Zenica , Zenica , Bosnia and Herzegovina
Faculty of Engineering and Natural Sciences, University of Zenica , Zenica , Bosnia and Herzegovina
Faculty of Engineering and Natural Sciences, University of Zenica , Zenica , Bosnia and Herzegovina
Institute "Kemal Kapetanović" Zenica, University of Zenica , Zenica , Bosnia and Herzegovina
Steel S690 QL is a high-strength quenched and tempered, fine-grained structural steel with a
minimum yield strength of ReH of 690 MPa and with guaranteed toughness (Charpy) for rolled
plates with a thickness of 3 to 50 mm. This paper presents the examination and analysis of the
microstructure and grain size results after quenching and tempering. Also, the aim of the
examination is to consider the segments of the technological process and its influence on the
physical and metallurgical characteristics, primarily on the microstructure and grain size, which
affect the tensile characteristics and toughness at low temperatures.
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