M. Mahmoudiniya - Iran University of Science and Technology (IUST), School of Metallurgy and Materials Engineering, Tehran, Iran.
Sh. Kheirandish - Iran University of Science and Technology (IUST), School of Metallurgy and Materials Engineering, Tehran, Iran.
M. Asadi Asadabad - Materials Research School, Isfahan, Iran

Nowadays, Ni-free austenitic stainless steels are being developed rapidly and high price of nickel is one of the most important motivations for this development. At present research a new FeCrMn steel was designed and produced based on Fe-Cr-Mn-C system. Comparative studies on microstructure and high temperature mechanical properties of  new steel and AISI ۳۱۶ steel were done. The results showed that new FeCrMn developed steel has single austenite phase microstructure, and its tensile strength and toughness were higher than those of ۳۱۶ steel at ۲۵, ۲۰۰,۳۵۰ and ۵۰۰°C. In contrast with ۳۱۶ steel, the new FeCrMn steel did not show strain induced transformation and dynamic strain aging phenomena during tensile tests that represented higher austenite stability of new developed steel. Lower density and higher strength of the new steel caused higher specific strength in comparison with the ۳۱۶ one that can be considered as an important advantage in structural applications but in less corrosive environment

FeCrMn austenitic stainless steel, high temperature tension properties, strength and toughness, strain induced transformation, dynamic strain aging