Process for making a martensitic steel alloy fuel cladding product

Patent · Mon Jan 01 00:00:00 EST 1990

OSTI ID:867390

Johnson, Gerald D ^[1]; Lobsinger, Ralph J ^[1]; Hamilton, Margaret L ^[2]; Gelles, David S ^[3]

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1. Kennewick, WA
2. Richland, WA
3. West Richland, WA

This is a very narrowly defined martensitic steel alloy fuel cladding material for liquid metal cooled reactors, and a process for making such a martensitic steel alloy material. The alloy contains about 10.6 wt. % chromium, about 1.5 wt. % molybdenum, about 0.85 wt. % manganese, about 0.2 wt. % niobium, about 0.37 wt. % silicon, about 0.2 wt. % carbon, about 0.2 wt. % vanadium, 0.05 maximum wt. % nickel, about 0.015 wt. % nitrogen, about 0.015 wt. % sulfur, about 0.05 wt. % copper, about 0.007 wt. % boron, about 0.007 wt. % phosphorous, and with the remainder being essentially iron. The process utilizes preparing such an alloy and homogenizing said alloy at about 1000.degree. C. for 16 hours; annealing said homogenized alloy at 1150.degree. C. for 15 minutes; and tempering said annealed alloy at 700.degree. C. for 2 hours. The material exhibits good high temperature strength (especially long stress rupture life) at elevated temperature (500.degree.-760.degree. C.).

• Research Organization: WESTINGHOUSE HANFORD CO
• DOE Contract Number: AC06-76FF02170
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4927468
• OSTI ID: 867390
• Country of Publication: United States
• Language: English

Related Subjects

process
martensitic
steel
alloy
fuel
cladding
product
narrowly
defined
material
liquid
metal
cooled
reactors
contains
10
wt
chromium
molybdenum
85
manganese
niobium
37
silicon
carbon
vanadium
05
maximum
nickel
015
nitrogen
sulfur
copper
007
boron
phosphorous
remainder
essentially
iron
utilizes
preparing
homogenizing
1000
degree
16
hours
annealing
homogenized
1150
15
minutes
tempering
annealed
700
exhibits
temperature
strength
especially
stress
rupture
life
elevated
500
-760
steel alloy
fuel cladding
temperature strength
process utilizes
liquid metal
elevated temperature
metal cooled
alloy material
cladding material
stress rupture
essentially iron
alloy contains
martensitic steel
narrowly defined
material exhibits
alloy fuel
cooled reactors
cooled reactor
/148/976/