Composite containing nickel-base austenitic alloys

Details Composite containing nickel-base austenitic alloys Composite containing nickel-base austenitic alloys

1983-03-07

1987-08-25

Dean, R.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

148410, 148427, 148428, 420448, 420453, 420454, 428680, B32B 1500

Patent

active

046892796

ABSTRACT:
A solid solution, nonmagnetic, austenitic nickel base alloy class is described. It contains: about 12 to 21 weight percent chromium; a concentration of molybdenum and/or tungsten, such that the sum of the weight percent molybdenum and one third the weight percent tungsten present is between 1 and 7 weight percent and wherein the w % tungsten is less than 12 w %; about 4 to 13 w % iron; small but effective amounts of the desulfurizing agent, manganese; and up to about 2.5 w % silicon. Carbon may be present at levels up to 0.15 w % and cobalt may be present at levels up to 2 w %. The above elements are balanced to provide alloys having a mean thermal expansion coefficient, .alpha..sub.(RT-T), for T.ltoreq.1000.degree. F., of less than 8.3.times.10.sup.-6 in./in./.degree.F., and preferably less than 8.times.10.sup.-6 in./in./.degree.F.
In addition, a precipitation hardening, non-magnetic, austenitic nickel base alloy class is also described. It contains: about 12 to 21 weight percent chromium; a concentration of molybdenum and/or tungsten, such that the sum of the weight percent molybdenum and one half the weight percent tungsten is between about 2 and 8 weight percent and wherein the weight percent tungsten is less than 12 w %; up to 13 w % iron; less than 0.15 w % carbon; less than 0.5 w % manganese; less than 1.0 w % silicon; less than 2.0 w % cobalt; 1.5 to 4.5 total w % of aluminum plus titanium; and 0.7 to 4.5 total w % of columbium and/or tantalum. The above elements are balanced to provide age hardened alloys having a means thermal expansion coefficient, .alpha..sub.(RT-T), for T=1000.degree. F., of less than 8.times.10.sup.-6 in/in/.degree.F. and preferably less than 7.9.times.10.sup.-6 in/in/.degree.F.
The alloys according to this invention also preferably have a high resistance to stress corrosion cracking in chloride or caustic contaminated environments.

REFERENCES:
patent: 3046108 (1962-07-01), Eiselstein

Affiliated with

Also associated with

Rating

Composite containing nickel-base austenitic alloys does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Composite containing nickel-base austenitic alloys, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Composite containing nickel-base austenitic alloys will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1922815