Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1979-01-25
1980-07-29
Andrews, M. J.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
C22C 3902
Patent
active
042149029
ABSTRACT:
An iron alloy is provided which exhibits excellent strength and toughness characteristics at cryogenic temperatures. The alloy consists essentially of about 10 to 16 percent by weight nickel, about 0.1 to 1.0 percent by weight aluminum, and 0 to about 3 percent by weight copper, with the balance being essentially iron. The iron alloy is produced by a process which includes using cold rolling at room temperature and subsequent heat treatment at temperatures ranging from 400.degree. to 650.degree. C., and possesses a fracture toughness ranging from 200 to 230 ksi .sqroot.in. and yield strengths up to 230 ksi.
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Stephens Joseph R.
Witzke Walter R.
Andrews M. J.
Manning J. R.
Musial N. T.
Shook G. E.
The United States of America as represented by the Administrator
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