AUSTENITIC STAINLESS STEEL EXCELLENT IN NEUTRON IRRADIATION EMBRITTLEMENT-RESISTING PROPERTY
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机译：中子辐照耐蚀性能中的奥氏体不锈钢优良
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PURPOSE:To prevent neutron irradiation embrittlement by incorporating specific percentage of C, Si, Mn, Cr, Ni, N, and B which is an essential component and has 11B in a ratio higher than the natural abundance ratio, or the like, so as to reduce 10B present in steel. CONSTITUTION:The titled stainless steel has a composition containing, by weight, =0.1% C, =1% Si, =2% Mn, 16-26% Cr, 6-18% Ni, =0.2% N and, as an essential component, 0.0001-0.01% specific B, also containing, as optional components, 0.01-0.5% Ti and/or 0.01-1% Nb, and having the balance Fe. The above-mentioned B has a ratio of B with 11 isotopic mass number to B with 10 isotopic mass number of =9. In the above steel, owing to the raw material containing B having 11B in a ratio higher than the natural abundance ratio, a harmful effect of 10B of causing the occurrence of He by the nuclear transformation by neutron irradiation is removed, so that neutron irradiation embrittlement can be prevented.
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