AUSTENITIC STAINLESS STEEL AND HYDROGEN RESISTANT MEMBER
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United States of America Patent
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Issued Date -
Mar 27, 2025
app pub date -
Sep 26, 2024
filing date -
Sep 26, 2024
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Abstract
The present invention relates to an austenitic stainless steel, consisting of: C≤0.10 mass %, Si≤0.50 mass %, 3.0 mass %≤Mn≤8.0 mass %, P≤0.30 mass %, S≤0.30 mass %, 7.0 mass %≤Ni≤12.0 mass %, 18.0 mass %≤Cr ≤28.0 mass %, 1.0 mass %≤Mo≤3.0 mass %, 0.03 mass %≤V≤0.50 mass %, 0.0003 mass %≤B≤0.0300 mass %, 0.0001 mass %≤Ca≤0.0300 mass %, 0.35 mass %≤N≤0.80 mass %, and 0.001 mass %≤Co≤1.00 mass %, and optionally, W≤2.0 mass %, Zr≤0.20 mass %, and Ta≤0.50 mass %, with a balance being Fe and unavoidable impurities, and having a number density of coarse alloy carbonitrides of 3×105 pieces/mm2 or less.
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