High temperature creep resistant austenitic alloy

Patent · Sat Dec 31 23:00:00 EST 1988

OSTI ID:867041

Maziasz, Philip J ^[1]; Swindeman, Robert W ^[1]; Goodwin, Gene M ^[2]

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1. Oak Ridge, TN
2. Lenoir City, TN

An improved austenitic alloy having in wt % 19-21 Cr, 30-35 Ni, 1.5-2.5 Mn, 2-3 Mo, 0.1-0.4 Si, 0.3-0.5 Ti, 0.1-0.3 Nb, 0.1-0.5 V, 0.001-0.005 P, 0.08-0.12 C, 0.01-0.03 N, 0.005-0.01 B and the balance iron that is further improved by annealing for up to 1 hour at 1150.degree.-1200.degree. C. and then cold deforming 5-15 %. The alloy exhibits dramatically improved creep rupture resistance and ductility at 700.degree. C.

• Research Organization: LOCKHEED MARTIN ENRGY SYST INC
• DOE Contract Number: AC05-84OR21400
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4849169
• OSTI ID: 867041
• Country of Publication: United States
• Language: English

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/420/148/
001-0
005
005-0
01
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03
08-0
1-0
1150
12
19-21
2-3
3-0
30-35
5-15
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700
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annealing
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austenitic alloy
balance
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wt