A Comparison Study of Fatigue Behavior of S355J2+N, S690QL and X37CrMoV5-1 Steel

Steel of the mild-strength S355J2+N steel grade is most often used for manufacturing carrying sections constructions exposed to fatigue loads. The use high-strength steels, such as S690QL, allows creation structures that are light and simple construct. However, increasing yield strength steels does not result in a corresponding increase resistance. As result, using subjected loading can be major design concern, raising question whether should at all. Most experimental investigations regarding hot work tool X37CrMoV5-1 found literature focused on its machining wear resistance, with insufficient attention paid cyclic This article evaluates properties S355J2+N, grades. A SHIMADZU servo-hydraulic testing machine perform uniaxial tensile tests under stress-controlled, fully reversed conditions (tensile–compression R = −1 stress ratio) accordance EN ISO ASTM standards. aim this paper highlight characteristics these three among their respective groups. belongs group hot-rolled normalized S690QL improved (quenched + tempered) increased strength, high-alloyed work. choice was made tested considered typical representatives Based test results which organized S–N curves, behavior entire mentioned groups foreseen.