NiCrFe ALLOY - NIPPON STEEL & SUMITOMO METAL CORP

Title:

NiCrFe ALLOY

Document Type and Number:

WIPO Patent Application WO/2018/066579

Kind Code:

A1

Abstract:

Provided is an NiCrFe alloy which has excellent creep strength and stress relaxation cracking resistance. This NiCrFe alloy contains, in mass%, C in the amount of 0.03-0.15%, Si in the amount of 1.00% or less, Mn in the amount of 2.00% or less, P in the amount of 0.040% or less, S in the amount of 0.0050% or less, Cr in the amount of 18.0-25.0%, Ni in the amount of 25.0-40.0%, Ti in the amount of 0.10-1.60%, Al in the amount of 0.05-1.00%, N in the amount of 0.020% or less, O in the amount of 0.008% or less, and rare earth elements (REM) in the amount of 0.001-0.100%, with Fe and impurities constituting the remainder. In addition, the alloy satisfies formulas (1)-(3). (1): 0.50≤Ti+48Al/27≤2.20 (2): 0.40≤Ti/(Ti+48Al/27)≤0.80 (3): Σ[REM/(A(REM))]-S/32-2/3·O/16≥0 The symbols for the elements in the formulas are substituted with the content (mass%) of the corresponding element, and A(REM) in formula (3) is substituted with the atomic weight of the rare earth elements.

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Inventors:

OKADA HIROKAZU (JP)
HAMAGUCHI TOMOAKI (JP)
KURIHARA SHINNOSUKE (JP)

Application Number:

PCT/JP2017/036059

Publication Date:

April 12, 2018

Filing Date:

October 04, 2017

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

C22C38/00; C22C30/02; C22C38/58

Domestic Patent References:

WO2010113843A1	2010-10-07
WO2012176586A1	2012-12-27
WO2013073423A1	2013-05-23

Foreign References:

JP2015196837A

2015-11-09

Other References: