Complete “stress-strain” diagrams of rolled steal beams Stanislav Fomin, Yuriy Izbash, Yuriy Bondarenko, Serhii Butenko and Iryna Plakhotnikova MATEC Web Conf., 230 (2018) 02008 Published online: 16 November 2018 DOI: 10.1051/matecconf/201823002008