Title:
STEEL MATERIAL FOR CRUDE OIL TANK WITH EXCELLENT CORROSION RESISTANCE, AND CRUDE OIL TANK
Document Type and Number:
WIPO Patent Application WO/2017/098701
Kind Code:
A1
Abstract:
By the component composition of this steel material comprising, in mass%, C: 0.03-0.18%, Si: 0.03-1.50%, Mn: 0.1-2.0%, P: 0.025% or less, S: 0.010% or less, Al: 0.015-0.049%, N: 0.008% or less, Co: 0.005-0.5%, and Sn: 0.005-0.3%, the remainder being Fe and unavoidable impurities, and by setting the dislocation density α of the steel material to within a range that satisfies the following formula (1), a steel material for a crude oil tank is obtained that has excellent general corrosion resistance in the upper plate of a crude oil tank such as a tanker oil tank unit and that also has excellent local corrosion resistance in the bottom plate of the crude oil tank. α(/m2) ≤ {1017×[%Co]×[%Sn]}/([%Al]-0.01)... (1), wherein [%M] is the content (mass%) of an element M
Inventors:
TSURI SHIRO (JP)
MURASE MASATSUGU (JP)
MURASE MASATSUGU (JP)
Application Number:
PCT/JP2016/005012
Publication Date:
June 15, 2017
Filing Date:
November 29, 2016
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B65D90/02; C22C38/00; B65D90/22; C22C38/10; C22C38/60; C21D8/02
Domestic Patent References:
| WO2015087531A1 | 2015-06-18 |
Foreign References:
| JP2014201756A | 2014-10-27 | |||
| JP2014201755A | 2014-10-27 | |||
| JP2014201757A | 2014-10-27 |
Attorney, Agent or Firm:
SUGIMURA, Kenji (JP)
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