Fe-base austenitic steel having single crystalline austenitic ph

Details Fe-base austenitic steel having single crystalline austenitic ph Fe-base austenitic steel having single crystalline austenitic ph

1991-03-14

1993-04-20

Dean, Rg28

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148404, 148327, 420 38, 420 43, 420 52, 420 4, C22C 3808, C22C 3818, C22C 3840

Patent

active

052039323

ABSTRACT:
An austenitic steel comprising Ni of 9-30%, Cr of 10-23%, and Fe of at least 45%, is characterized in comprising enough Cr and Ni to form whole austenitic structure in the equilibrium diagram at 700.degree. C., having austenitic phase at room temperature, and the austenitic phase is a single crystal, and has superior resistance against stress. The austenitic steel preferably comprises C.ltoreq.0.1%, Si.ltoreq.1%, Mn.ltoreq.2%, Ni 9-15%, Cr 16-18.5%, and at least one of elements selected from the group of Mo 1-3%, Ti 0.05-1%, and Nb 0.1-1.5%. The alloy is useful as a material for members of a reactor core of a nuclear reactor.

REFERENCES:
patent: 4054469 (1977-10-01), Jackson
patent: 4361443 (1982-11-01), Isobe et al.
patent: 4560407 (1985-12-01), Yoshida et al.

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