STEEL MATERIAL HAVING EXCELLENT ALCOHOL-INDUCED PITTING CORROSION RESISTANCE AND ALCOHOL-INDUCED SCC RESISTANCE
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United States of America Patent
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Oct 29, 2015
app pub date -
Dec 2, 2013
filing date -
Dec 5, 2012
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Abstract
A steel material excellent in alcohol-induced pitting corrosion resistance and alcohol-induced SCC resistance enables application in large structures without the need of alloy treatment or addition of inhibitors, by improving the pitting corrosion resistance and the SCC resistance of the steel material itself, by having a chemical composition containing, by mass % C: 0.03% to 0.3%, Si: 0.01% to 1.0%, Mn: 0.1% to 2.0%, P: 0.03% or less, S: 0.01% or less and Al: 0.1% or less, and one or both of Mo: 0.03% to 1.0% and W: 0.03% to 1.0%, and at least two of Sb: 0.005% to 0.5%, Sn: 0.01% to 0.3% and Nb: 0.005% to 0.1%, and the balance including Fe and incidental impurities.
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