| 摘要 |
<p>Disclosed is a steel material which, when used in an oil tank for an oil tanker, a tank for transporting a crude oil, a tank for storage of a crude oil or the like, can reduce a local corrosion on a bottom plate or a general corrosion on a top board or a side board. The steel material for a crude oil storage tank has the following chemical composition: C: 0.001-0.16 mass%, Si: 0.01-1.5 mass%; Mn: 0.1-2.5 mass%; P: 0.025 mass% or less; S: 0.01 mass% or less; Al: 0.005-0.1 mass%; N: 0.001-0.008 mass%; W: 0.001-0.5 mass%; and Cr: not less than 0.06 mass% and less than 0.20 mass%; with the remainder being Fe and unavoidable impurities.</p> |
