Steel having improved toughness in welding heat-affected zone
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United States of America Patent
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Nov 16, 1999
Grant Date -
N/A
app pub date -
Dec 4, 1997
filing date -
Apr 17, 1996
priority date (Note) -
In Force
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Abstract
A steel having excellent HAZ toughness can be used for ships, buildings, pressure containers, linepipes, and so forth. The steel is of a Ti--Mg--O system steel containing at least 40 pcs/mm.sup.2 of oxide and composite oxide particles of Ti and Mg having a size of 0.001 to 5.0 .mu.m. A steel having excellent HAZ toughness can be produced, and the safety of structures using this steel can be remarkably improved.
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