FERRITIC STAINLESS STEEL SHEET FOR EGR COOLERS
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United States of America Patent
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Issued Date -
Jul 21, 2011
app pub date -
Oct 23, 2009
filing date -
Oct 24, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A ferritic stainless steel sheet for EGR coolers includes at least, by mass % C: 0.03% or less, N: 0.05% or less, Si: 0.1% to 1%, Mn: 0.02% to 2%, Cu: 0.2% to 1.5%, Cr: 15% to 25%, Nb: 8 (C+N) % to 1%, Al: 0.5% or less, and Fe and inevitable impurities as the balance, wherein the steel sheet further includes, by mass %, Ti at an amount fulfilling the following formulae (1) and (2), and Cr and Cu are included at amounts fulfilling the following formula (3),Ti-3N≦0.03 (1),10(Ti-3N)+Al≦0.5 (2),andCr+2.3Cu≧18 (3).
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