Abstract. High strength steels cover a wide spectrum of applications and are increasingly used in different fields due to their distinctive characteristics, namely an excellent strength/weight ratio. Despite significant advances in metallurgy and the potential to create high and ultra high strength steels, all international steel design specifications provide little information on slenderness limits. The objective of this special issue is to promote the dissemination of the latest research on high-strength low-alloy HSLA steels from different perspectives. 2. Contributions. Understanding microstructural characteristics and their dependence on mechanical behavior is of essential importance for the development of safe and high-strength microalloy steels. High-strength microalloy steels are widely used in various branches of technology and industry due to the simultaneous combination of high strength indicators. ductility, fatigue, corrosion resistance and other service properties. This is achieved through the reasonable choice of the optimum chemical composition and, in this sense, medium manganese steels have emerged as an attractive high strength alloy, 6,7, relying on the abundant Mn on Earth as its element. major alloy. These steels are generally. An extensive experimental study was carried out to investigate the plane strain bending performance of seven grades of advanced high-strength steels under test conditions covering a range of tensile strengths MPa Mpa and bending severities, t Rp. 5.