AUSTENITIC HEAT RESISTANT ALLOY - NIPPON STEEL & SUMITOMO METAL CORP

Title:

AUSTENITIC HEAT RESISTANT ALLOY

Document Type and Number:

Japanese Patent JP2013095949

Kind Code:

A

Abstract:

To provide an austenitic heat resistant alloy which contains a lot of amount of Co and is excellent in weldability, among austenitic heat resistant alloys excellent in creep strength.

The austenitic heat resistant alloy has a chemical composition containing C:0.03-0.15%, Si≤1%, Mn≤2%, Ni:40-80%, Cr:15-40% Mo:4-15%, Co:15-25%, Ti:≤3%, Al:≤2%, B:0.0005-0.01%, N:≤0.03%, O:≤0.03%, and the remainder of Fe and impurities, wherein P and S in the impurities are P:≤0.03%, S:≤0.03%, respectively. In the alloy, an average crystal particle size d (μm) satisfies [d≤-3300×(10×B+2×P+S)+250]. The austenitic heat resistant alloy may contain one or more of Ca:≤0.02%, Mg:≤0.02% and REM:≤0.08% in place of the portion of Fe.

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Inventors:

JOTOKU KANA
HIRATA HIROMASA
ISEDA ATSURO
YOSHIZAWA MITSURU
SENBA MITSUYUKI

Application Number:

JP2011238248A

Publication Date:

May 20, 2013

Filing Date:

October 31, 2011

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP

International Classes:

C22C19/05

Domestic Patent References:

JP2010275597A	2010-12-09
JPH04191353A	1992-07-09
JPH1046278A	1998-02-17
JPH10121170A	1998-05-12
JP2003117687A	2003-04-23

Foreign References:

WO2011071054A1

2011-06-16

Attorney, Agent or Firm:

Mikiji Sugioka
Chihara

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