Mechanical properties of butt-welded ultra-high strength steels at elevated temperatures

Variety of ultra-high strength steels (UHSS) with different microstructural characteristics is becoming available continuous development the manufacturing process in steel industries. In order to effectively design structures made such grades, a detailed knowledge mechanical properties vital. Fire safety one areas which essential. Welding indispensable construction inevitable welding-induced degradation UHSSs. Thus, conducting experimental research on elevated-temperature constitutive behavior welded joints UHSSs paramount importance. This study addresses as-received and as-welded S960 (manufactured via direct quenching technique) S1100 (quenched tempered) grades. A fully automated gas metal arc welding (GMAW) low heat input value was utilized join plates. Next, steady-state uniaxial tensile tests temperature range between room (RT) 900 °C were carried out. Accordingly, reduction factor-temperature relations for each tested both forms are discussed compared several standards, as well previous studies literature. Finally, predictive equations proposed estimate factors forms.