STEEL FOR CRUDE OIL TANK HAVING EXCELLENT CORROSION RESISTANCE, WELDED JOINT, AND CRUDE OIL TANK
- 申请公布号：
- JP2012117139(A)
- 申请号：
- JP20100270561
- 申请日期：
- 2010.12.03
- 申请公布日期：
- 2012.06.21
- 申请人：
- JFE STEEL CORP
- 发明人：
- TSURI YUKIO;MURASE MASAJI
- 分类号：
- C22C38/00;B23K9/00;B23K9/23;B23K35/30;B23K103/04;C21D8/02;C22C38/16;C22C38/60
- 主分类号：
- C22C38/00
- 摘要：
- <P>PROBLEM TO BE SOLVED: To provide a steel for a crude oil tank capable of reducing greatly overall corrosion or local corrosion generated in the crude oil tank, and to provide a welded joint and the crude oil tank. <P>SOLUTION: When manufacturing a crude oil tank by welding a steel containing in mass%, 0.03-0.16% C, 0.05-1.50% Si, 0.1-2.0% Mn, ≤0.025% P, ≤0.010% S, 0.005-0.10% Al, ≤0.008% N, 0.001-0.5% Ge and 0.03-0.4% Cu, and also containing one or two or more kinds selected from 0.01-1.0% W, 0.01-0.5% Mo, 0.005-0.2% Sn and 0.005-0.4% Sb, a welded joint is formed, in which a welded metal part satisfies following relations: 1<(Cu content in a welded metal/Cu content in a base metal)≤50, and 0.25≤(Cu content in the welded metal/total content of Mo and W in the welded metal)≤3. <P>COPYRIGHT: (C)2012,JPO&INPIT
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