High strength phosphorus-containing steel and method for producing the same
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United States of America Patent
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Sep 11, 2001
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N/A
app pub date -
Aug 31, 1999
filing date -
Aug 31, 1998
priority date (Note) -
Expired
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Abstract
A high strength phosphorus-containing steel having fine texture free from the problem of embrittlement by positively using the presence of P, which is a carbon steel having an average ferritic grain diameter of 3 .mu.m or less and containing from 0.04 to 0.1% by mass of P, wherein the volume fraction of P segregated in the grain boundary accounts for 0.3 or less in case the grain boundary is covered by a P layer 1 nm in thickness.
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