High strength low thermal expansion alloy

Details High strength low thermal expansion alloy High strength low thermal expansion alloy

1996-08-14

1997-11-18

Yee, Deborah

Alloys or metallic compositions

Ferrous

Over 10 percent nickel containing

420 95, 420 97, 420581, 4205841, 420586, C22C 3808, C22C 3200

Patent

active

056884710

ABSTRACT:
The alloy of the invention provides a low coefficient of thermal expansion alloy having a CTE of about 4.9.times.10.sup.-6 m/m/.degree.C. or less at 204.degree. C. and a relatively high strength. The alloy contains about 40.5 to about 48 nickel, about 2 to about 3.7 niobium, about 0.75 to about 2 titanium, about 0 to about 1 aluminum, about 3.7 or less total niobium plus tantalum and a balance of iron and incidental impurities. Alloys of the invention may be aged to a Rockwell C hardness of at least about 30.

REFERENCES:
patent: 3514284 (1970-05-01), Eiselstein
patent: 3705827 (1972-12-01), Muzyka et al.
patent: 3971677 (1976-07-01), Mason et al.
patent: 4445943 (1984-05-01), Smith, Jr. et al.
patent: 4517158 (1985-05-01), Miyauchi et al.
patent: 5304346 (1994-04-01), O'Donnell et al.

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