| 摘要 |
<p>A steel sheet having a chemical composition comprising, in mass%, 0.03 to 0.3% of C, 0.01 to 1.0% of Si, 0.1 to 2.0% of Mn, 0.03% or less of P, 0.01% or less of S, 0.1% or less of Al, one or both of 0.03 to 1.0% of Mo and 0.03 to 1.0% of W, at least two components independently selected from 0.005 to 0.5% of Sb, 0.01 to 0.3% of Sn and 0.005 to 0.1% of Nb, and a remainder made up by Fe and unavoidable impurities. It becomes possible to provide a steel material having excellent alcohol-induced pitting corrosion resistance and alcohol-induced SCC resistance. The steel material has improved pitting corrosion resistance and SCC resistance and is therefore applicable to large-size structures without requiring carrying out a plating treatment, adding an inhibitor or the like.</p> |
