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Patent Searching and Data


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.

Inventors:
OKADA HIROKAZU (JP)
HAMAGUCHI TOMOAKI (JP)
KURIHARA SHINNOSUKE (JP)
Application Number:
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:
WO2010113843A12010-10-07
WO2012176586A12012-12-27
WO2013073423A12013-05-23
Foreign References:
JP2015196837A2015-11-09
Other References:
See also references of EP 3524705A4
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (JP)
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