Steel material having excellent alcohol-induced pitting corrosion resistance and alcohol-induced SCC resistance
AssigneeJfe Steel Corporation
InventorsItaru Samusawa, Kazuhiko Shiotani
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Abstract
A steel material of the disclosure has a chemical composition containing, in mass %: 0.03% to 0.3% C; 0.03% to 1.0% Si; 0.1% to 2.0% Mn; 0.003% to 0.03% P; 0.005% or less S; 0.005% to 0.1% Al; 0.005% to 0.5% Cu; 0.01% to 0.5% Sb; and 0.005% to 0.5% Ni, with a balance being Fe and incidental impurities. Thus, the steel material has excellent alcohol-induced pitting corrosion resistance and alcohol-induced SCC resistance, and can be used for large structures with no need for coating, inhibitor addition, or the like by improving the pitting corrosion resistance and SCC resistance of the steel material itself.
Claims5
A steel material having a chemical composition comprising, by mass%:
- 0.03% to 0.3% C;
- 0.03% to 1.0% Si;
- 0.1% to 2.0% Mn;
- 0.003% to 0.03% P;
- 0.005% or less S;
- 0.005% to 0.1% Al;
- 0.005% to 0.5% Cu;
- 0.03% to 0.5% Sb;
- and
- 0.005% to 0.5% Ni,
- with a balance being Fe and incidental impurities,
- wherein the Sb content and the S content satisfy Sb/S≥15, and the Ni content and the Cu content satisfy Ni/Cu≥0.2.
Dependencies are inferred from the claim text.