Abstract
The structure and the mechanical properties of a cast high-nitrogen austenitic steel are studied after hot and cold deformation. The as-cast steel contains the FeCrB and BN phases. During hot deformation, the B13N13C74 phase forms. This phase has a layered structure and is easily deformed during hot or cold rolling. The existence of the B13N13C74 phase only slightly changes the strength and the ductility, but it substantially decreases the impact toughness of the steel as compared to that of similar boron-free Cr–Mn–Ni high-nitrogen austenitic steels.
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