STAINLESS STEEL PRODUCT CONTAINING B AND METHOD FOR PRODUCTION THEREOF

摘要

A stainless steel slab containing B, wherein a protecting material is joined onto at least two faces across the bloom from each other in a stainle ss steel bloom containing B of 0.3 - 2.5 mass %, being integrated into one-piec e by forming a weld metal comprising a stainless steel with chemical composition that satisfies the relationship expressed by following formulas (1) - (4), and a method to produce a steel product by rolling said slab. Further, it is preferable to interpose an insert material between above stainless steel bloom and above protecting material in bonding process. 15~Cr eq~30 --- (1), 4~Cr eq - Ni eq~17 --- (2), Cr eq = Cr + 1.5 Si + Mo - 5 B --- (3), Ni eq = Ni + 30 (C + N) + 0.5 Mn --- (4) Herein, each symbol of a chemical element designates the content (mass %) of relevant chemical element contained in steel. Accordingly, it makes it possible to subject a stainless steel slab containing B to hot working without generating edge cracking, so as to be used as a source material of a neutron shielding container and a separator of a fuel cell.