B-column for motor vehicle
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United States of America Patent
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Feb 25, 2003
Grant Date -
Aug 8, 2002
app pub date -
Aug 20, 2001
filing date -
Aug 19, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A B-column comprises a component of a car body for a motor vehicle. The B-column constitutes a longitudinal steel profile. The invention provides that the longitudinal profile has a first longitudinal portion comprised of a martensitic material structure and a strength of more than 1400 N/mm.sup.2 and has a second longitudinal portion of higher ductility with a predominantly ferritic-perlitic material structure and a strength of below 850 N/mm.sup.2. The lower longitudinal portion is wider then the upper longitudinal portion and has an elongation at rupture which is below 25%.
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