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Title: Austenitic stainless steel for high temperature applications

Abstract

This invention describes a composition for an austenitic stainless steel which has been found to exhibit improved high temperature stress rupture properties. The composition of this alloy is about (in wt. %): 12.5 to 14.5 Cr; 14.5 to 16.5 Ni; 1.5 to 2.5 Mo; 1.5 to 2.5 Mn; 0.1 to 0.4 Ti; 0.02 to 0.08 C; 0.5 to 1.0 Si; 0.01 maximum, N; 0.02 to 0.08 P; 0.002 to 0.008 B; 0.004-0.010 S; 0.02-0.05 Nb; 0.01-0.05 V; 0.005-0.02 Ta; 0.02-0.05 Al; 0.01-0.04 Cu; 0.02-0.05 Co; 0.03 maximum, As; 0.01 maximum, O; 0.01 maximum, Zr; and with the balance of the alloy being essentially iron. The carbon content of the alloy is adjusted such that wt. % Ti/(wt. % C+wt. % N) is between 4 and 6, and most preferably about 5. In addition the sum of the wt. % P+wt. % B+wt. % S is at least 0.03 wt. %. This alloy is believed to be particularly well suited for use as fast breeder reactor fuel element cladding.

Inventors:
 [1];  [2]
  1. (Kennewick, WA)
  2. (Pasco, WA)
Issue Date:
Research Org.:
WESTINGHOUSE HANFORD CO
OSTI Identifier:
865524
Patent Number(s):
4530719
Assignee:
Westinghouse Electric Corp. (Pittsburgh, PA) OSTI
DOE Contract Number:  
AC06-76FF02170
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
austenitic; stainless; steel; temperature; applications; describes; composition; found; exhibit; improved; stress; rupture; properties; alloy; wt; 12; 14; 16; mn; 02; 08; 01; maximum; 002; 008; 004-0; 010; 02-0; 05; nb; 01-0; 005-0; 04; cu; 03; zr; balance; essentially; iron; carbon; content; adjusted; preferably; addition; believed; particularly; suited; fast; breeder; reactor; fuel; element; cladding; exhibit improved; temperature applications; breeder reactor; fast breeder; fuel element; stainless steel; reactor fuel; austenitic stainless; temperature stress; stress rupture; carbon content; essentially iron; rupture properties; temperature application; /420/148/376/976/

Citation Formats

Johnson, Gerald D., and Powell, Roger W. Austenitic stainless steel for high temperature applications. United States: N. p., 1985. Web.
Johnson, Gerald D., & Powell, Roger W. Austenitic stainless steel for high temperature applications. United States.
Johnson, Gerald D., and Powell, Roger W. Tue . "Austenitic stainless steel for high temperature applications". United States. https://www.osti.gov/servlets/purl/865524.
@article{osti_865524,
title = {Austenitic stainless steel for high temperature applications},
author = {Johnson, Gerald D. and Powell, Roger W.},
abstractNote = {This invention describes a composition for an austenitic stainless steel which has been found to exhibit improved high temperature stress rupture properties. The composition of this alloy is about (in wt. %): 12.5 to 14.5 Cr; 14.5 to 16.5 Ni; 1.5 to 2.5 Mo; 1.5 to 2.5 Mn; 0.1 to 0.4 Ti; 0.02 to 0.08 C; 0.5 to 1.0 Si; 0.01 maximum, N; 0.02 to 0.08 P; 0.002 to 0.008 B; 0.004-0.010 S; 0.02-0.05 Nb; 0.01-0.05 V; 0.005-0.02 Ta; 0.02-0.05 Al; 0.01-0.04 Cu; 0.02-0.05 Co; 0.03 maximum, As; 0.01 maximum, O; 0.01 maximum, Zr; and with the balance of the alloy being essentially iron. The carbon content of the alloy is adjusted such that wt. % Ti/(wt. % C+wt. % N) is between 4 and 6, and most preferably about 5. In addition the sum of the wt. % P+wt. % B+wt. % S is at least 0.03 wt. %. This alloy is believed to be particularly well suited for use as fast breeder reactor fuel element cladding.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

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