3%Ni系高耐候性鋼の機械的性質の現状

抄録

Recently, many kinds of weathering steel were widely used in steel bridges. 1% and 3% Ni-advanced weathering steel are new types of weathering steel. It was considered that the quality of these steel have been remarkably improved. However, such improvement had not been quantitatively clarified. Therefore, in the past, we had investigated 753 of 1% Ni-advanced weathering steel on the basis of the mill sheet in order to clarify their quality, and these steel mechanical properties had been shown. In this paper, we investigated the 764 of 3% Ni-advanced weathering steel on the basis of the mill sheet. Investigated items were tensile strength, yield strength, charpy-absorbed-energy, elongation and yield ratio. We also discussed how much of these quantities were improved, comparing with the conventional weathering steel data.