High temperature creep resistant austenitic alloy

Details High temperature creep resistant austenitic alloy High temperature creep resistant austenitic alloy

1988-05-13

1989-07-18

Rutledge, L. Dewayne

Alloys or metallic compositions

Containing over 50 per cent metal but no base metal

Iron containing

420 53, 420586, C22C 3000

Patent

active

048491691

ABSTRACT:
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.

REFERENCES:
Swindeman et al, "Procurement and Screening Test Data for Advanced Austenitic Alloys for 650.degree. C. Steam Service," ORNL/TM-10206/P1.

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