Austenitic iron and an iron product
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United States of America Patent
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Feb 21, 2012
Grant Date -
Apr 24, 2008
app pub date -
Dec 28, 2005
filing date -
Dec 28, 2004
priority date (Note) -
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Abstract
High-alloy austenitic stainless steels that are extra resistant to pitting and crevice corrosion in aggressive, chloride-containing solutions have a tendency for macro-segregation of Mo, at solidification of the melt. This problem is solved by a super austenite stainless steel having the following composition, in % by weight: max 0.03 C, max 0.5 Si, max 6 Mn, 28-30 Cr, 21-24 Ni, 4-6% (Mo+W/2), the content of W being max 0.7, 0.5-1.1 N, max 1.0 Cu, balance iron and impurities at normal contents originating from the production of the steel.
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