High-Mn austenitic stainless steel and a producing method of high-Mn austenitic stainless steel sheet
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United States of America Patent
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Dec 27, 2016
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Jun 19, 2014
app pub date -
Feb 21, 2014
filing date -
Feb 27, 2009
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Abstract
High-Mn austenitic stainless steels having a chemical composition comprising C: 0.02-0.12 mass %, Si: 0.05-1.5 mass %, Mn: 10.0-22.0 mass %, S: not more than 0.0028 mass %, Ni: 4.0-12.0 mass %, Cr: 14.0-25.0 mass % and N: 0.07-0.17 mass % with the balance being Fe and inevitable impurities, provided that these components are contained so that δ cal represented by the following equation is not more than 5.5%: δ cal (mass %)=(Cr+0.48Si)−(Ni+0.11Mn−0.0101Mn2+26.4C+20.1N)−4.7, wherein each element symbol in the equation is a content of the respective element (mass %), and having a magnetic permeability of not more than 1.003 under a magnetic field of 200 kA/m.
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