HEAT-RESISTANT FERRITIC STEEL

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United States of America Patent

APP PUB NO 20240318289A1
SERIAL NO

18579095

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Provided is a heat-resistant ferritic steel having a chemical composition containing, by mass %, C: 0.07 to 0.14%, Si: 0.15 to 0.35%, Mn: 0.30 to 0.55%, P: 0.0250% or less, S: 0.0030% or less, Ni: 0.15 to 0.35%, Cr: 8.0 to 9.7%, Mo: 0.20 to 0.60%, W: 1.50 to 2.30%, V: 0.16 to 0.25%, Nb: 0.020 to 0.120%, B: 0.0010 to 0.0050%, N: 0.010 to 0.080%, Al: 0.020% or less, and O: 0.020% or less, with the balance Fe and impurities, wherein VER, i.e., the V content (mass %) in precipitates obtained by extracted residue analysis satisfies [−0.2×C+0.060≤VER≤−0.1×C+0.160].

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Patent Owner(s)

Patent OwnerAddress
NIPPON STEEL CORPORATIONCHIYODA-KU TOKYO 100-8071

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
HIGUCHI, Junichi Tokyo, JP 63 745
HIRATA, Hiroyuki Tokyo, JP 63 446
OSUKI, Takahiro Tokyo, JP 36 103
TAKIGUCHI, Masayuki Tokyo, JP 7 66
TANAKA, Katsuki Tokyo, JP 17 7
YOSHIZAWA, Mitsuru Tokyo, JP 17 51

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