Corrosion resistant, high strength alloy and a method for manufacturing the same
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United States of America Patent
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Jul 27, 2004
Grant Date -
Nov 7, 2002
app pub date -
Feb 27, 2002
filing date -
Feb 27, 2001
priority date (Note) -
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Abstract
A corrosion resistant, high strength austenitic stainless steel consisting of 1.0% or less of Si, 2.0% or less of Mn, 0.5% or less of O, 7 to 30% of Ni, 14 to 26% of Cr, 0.3% or less of combination of C and N, at least one element selected from the group consisting of 1.0% or less of Ti, 2.0% or less of Zr and 2.0% or less of Nb, and the balance consisting of Fe and unavoidable impurities, the percentage being given in weight basis; said steel containing carbonitride with a grain size of several to 100 nm dispersed therein; said steel having an average crystal grain size of 1 .mu.m or less; and said steel containing 90% by volume or more of austenite phase; is excellent in strength and corrosion resistance.
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