| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a corrosion-resistant steel material for a tanker, which has excellent corrosion resistance in a corrosive environment produced in an oil tank in the tanker and also has excellent post-coating corrosion resistance in a corrosive environment produced in a ballast tank in the tanker. <P>SOLUTION: The corrosion-resistant steel material for a crude oil tanker has a composition comprising, by mass, 0.03 to 0.16% C, 0.05 to 1.50% Si, 0.1 to 2.0% Mn,≤0.025% P,≤0.01% S, 0.005 to 0.10% Al,≤0.008% N, >0.1 to 0.5% Cr and 0.03 to 0.5% Cu, also comprising, as a selective additional element(s), one or more kinds selected from 0.01 to 0.5% W, 0.01 to 0.5% Mo, 0.001 to 0.2% Sn, 0.001 to 0.5% Sb, 0.005 to 0.3% Ni and 0.005 to 0.3% Co, and further comprising Cu, W, Mo, Sn, Sb, Cr, Ni, Co, S and P so as to satisfy predetermined relation. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
