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Title: Creep resistant, precipitation-dispersion-strengthened, martensitic stainless steel and method thereof

An iron-based, corrosion-resistant, precipitation strengthened, martensitic steel essentially free of delta ferrite for use at high temperatures has a nominal composition of 0.05--0.1 C, 8--12 Cr, 1--5 Co, 0.5--2.0 Ni, 0.41--1.0 Mo, 0.1--0.5 Ti, and the balance iron. This steel is different from other corrosion-resistant martensitic steels because its microstructure consists of a uniform dispersion of fine particles, which are very closely spaced, and which do not coarsen at high temperatures. Thus at high temperatures this steel combines the excellent creep strength of dispersion-strengthened steels, with the ease of fabricability afforded by precipitation hardenable steels. 2 figures.
Authors:
Publication Date:
OSTI Identifier:
7109058
Report Number(s):
US 5310431; A
PPN: US 7-957724
DOE Contract Number:
FG07-89ER12892
Resource Type:
Patent
Resource Relation:
Patent File Date: 7 Oct 1992
Research Org:
Carnegie-Mellon University
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; MARTENSITIC STEELS; CORROSION RESISTANCE; CREEP; MICROSTRUCTURE; CARBON ADDITIONS; CHEMICAL COMPOSITION; CHROMIUM ALLOYS; COBALT ALLOYS; MOLYBDENUM ADDITIONS; NICKEL ADDITIONS; NICKEL ALLOYS; TITANIUM ADDITIONS; ALLOYS; IRON ALLOYS; IRON BASE ALLOYS; MECHANICAL PROPERTIES; MOLYBDENUM ALLOYS; STEELS; TITANIUM ALLOYS 360100* -- Metals & Alloys