Cast alumina forming austenitic stainless steels
Abstract
An austenitic stainless steel alloy consisting essentially of, in terms of weight percent ranges 0.15-0.5C; 8-37Ni; 10-25Cr; 2.5-5Al; greater than 0.6, up to 2.5 total of at least one element selected from the group consisting of Nb and Ta; up to 3Mo; up to 3Co; up to 1W; up to 3Cu; up to 15Mn; up to 2Si; up to 0.15B; up to 0.05P; up to 1 total of at least one element selected from the group consisting of Y, La, Ce, Hf, and Zr; <0.3Ti+V; <0.03N; and, balance Fe, where the weight percent Fe is greater than the weight percent Ni, and wherein the alloy forms an external continuous scale comprising alumina, and a stable essentially single phase FCC austenitic matrix microstructure, the austenitic matrix being essentially delta-ferrite free and essentially BCC-phase-free. A method of making austenitic stainless steel alloys is also disclosed.
- Inventors:
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1083284
- Patent Number(s):
- 8431072
- Application Number:
- 13/114,745
- Assignee:
- UT-Battelle, LLC (Oak Ridge, TN)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B22 - CASTING B22D - CASTING OF METALS
C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
- DOE Contract Number:
- AC05-00OR22725
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Muralidharan, Govindarajan, Yamamoto, Yukinori, and Brady, Michael P. Cast alumina forming austenitic stainless steels. United States: N. p., 2013.
Web.
Muralidharan, Govindarajan, Yamamoto, Yukinori, & Brady, Michael P. Cast alumina forming austenitic stainless steels. United States.
Muralidharan, Govindarajan, Yamamoto, Yukinori, and Brady, Michael P. Tue .
"Cast alumina forming austenitic stainless steels". United States. https://www.osti.gov/servlets/purl/1083284.
@article{osti_1083284,
title = {Cast alumina forming austenitic stainless steels},
author = {Muralidharan, Govindarajan and Yamamoto, Yukinori and Brady, Michael P},
abstractNote = {An austenitic stainless steel alloy consisting essentially of, in terms of weight percent ranges 0.15-0.5C; 8-37Ni; 10-25Cr; 2.5-5Al; greater than 0.6, up to 2.5 total of at least one element selected from the group consisting of Nb and Ta; up to 3Mo; up to 3Co; up to 1W; up to 3Cu; up to 15Mn; up to 2Si; up to 0.15B; up to 0.05P; up to 1 total of at least one element selected from the group consisting of Y, La, Ce, Hf, and Zr; <0.3Ti+V; <0.03N; and, balance Fe, where the weight percent Fe is greater than the weight percent Ni, and wherein the alloy forms an external continuous scale comprising alumina, and a stable essentially single phase FCC austenitic matrix microstructure, the austenitic matrix being essentially delta-ferrite free and essentially BCC-phase-free. A method of making austenitic stainless steel alloys is also disclosed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 30 00:00:00 EDT 2013},
month = {Tue Apr 30 00:00:00 EDT 2013}
}
Works referenced in this record:
Oxidation resistant high creep strength austenitic stainless steel
patent, June 2010
- Brady, Michael P.; Pint, Bruce A.; Liu, Chain T.
- US Patent Document 7,744,813
High Nb, Ta, and Al creep- and oxidation-resistant austenitic stainless steel
patent, July 2010
- Brady, Michael P.; Santella, Michael L.; Yamamoto, Yukinori
- US Patent Document 7,754,144
High Mn austenitic stainless steel
patent, July 2010
- Yamamoto, Yukinori; Santella, Michael L.; Brady, Michael P.
- US Patent Document 7,754,305