Ultrahigh strength hot-rolled steel and method of producing bands
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United States of America Patent
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Apr 20, 2010
Grant Date -
Sep 21, 2006
app pub date -
Jan 14, 2004
filing date -
Jan 15, 2003
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Abstract
The invention relates to ultrahigh strength hot-rolled steel having a chemical composition consisting of, by weight: 0.05%.ltoreq.C.ltoreq.0.1% 0.7%.ltoreq.Mn.ltoreq.1.1% 0.5%.ltoreq.Cr.ltoreq.1.0% 0.05%.ltoreq.Si.ltoreq.0.3% 0.05%.ltoreq.Ti.ltoreq.0.1% Al.ltoreq.0.07% S.ltoreq.0.03% P.ltoreq.0.05% the remainder comprising iron and impurities resulting from the production thereof. Moreover, the inventive steel has a bainitic-martensitic structure which can contain up to 5% ferrite. The invention also relates to a method of producing bands of said steel.
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