Abstract: A thermally respective, monometallic article is isclosed which obviates the need for bonding of dissimilar metals as in a bimetal. The thermally responsive article is formed of an alloy or a metal and has at least two portions. The two portions are characterized by different coefficients of thermal expansion over a given temperature range, the difference being sufficiently large to result in deflection of the article when heated or cooled. In the preferred form of the article, the alloy or metal is present in a first phase in one portion of the article and in a second phase in the other portion. The process for obtaining the dual phase arrangement includes subjecting one portion of an intermediate form to cold treatment, cold reduction, decarburization, or a combination thereof, depending on the material used. A cathode ray tube employing the thermally responsive article as a temperature compensating device is also disclosed.

Abstract: A thermally stable Super Invar has a substantially suppressed martensitic transformation inception point as well as an average coefficient of thermal expansion substantially lower than Invar. The composition in weight percent consists essentially of______________________________________ w/o ______________________________________ C 0.02 Max. Mn 0.4-0.8 Si up to 0.25 Ni 32.0-33.2 Co 4.5-5.5 ______________________________________and the balance iron except for incidental amounts of other elements including up to 0.015 w/o P, 0.015 w/o S, 0.25 w/o Cr, 0.20 w/o Mo, 0.20 w/o. Cu, as well as other incidental elements in amounts which do not undesirably affect the austenitic microstructure or otherwise detract from the desired properties of the alloy. The composition is particularly suited for the manufacture of precision optical articles as well as other articles where minimal expansion mismatch between a metal member and a nonmetal member is required at temperatures of -90.degree. C. (-130.degree. F.) and lower.

Abstract: An austenitic alloy useful as the high thermal expansion element of a temperature-sensitive bimetal strip. The alloy consists essentially of about 0.5 w/o Max. carbon, 3.0-7.0 w/o manganese, 2.5-4.0 w/o chrominum, 16.0-22.0 w/o nickel and the balance essentially iron, except for incidental impurities.

Abstract: Bimetal strip the high-expansion element of which is an alloy which, in weight percent (w/o), consists essentially of up to about 0.50 w/o carbon, about 15-50 w/o manganese, up to about 2 w/o silicon, up to about 12 w/o chromium, about 10-35 w/o nickel, up to about 10 w/o cobalt and the balance iron except for incidental amounts of other elements which may include up to about 0.04 w/o phosphorus, up to about 0.04 w/o sulfur as well as other elements which do not significantly detract from the desired properties or result in the formation of ferrite or otherwise render the desired room temperature austenitic structure of the alloy unstable so as to significantly reduce the coefficient of thermal expansion.

Abstract: A compacted article having low thermal expansivity and high thermal conductivity is made by compacting a mixture of two metal powders, one of which has low thermal expansivity and the other of which has high thermal conductivity, and strip material made therefrom which is suitable for use in forming the supportive lead frames in integrated circuit components. The powders are mixed together, formed into a green preform, sintered, and rolled to size to produce compacted or densified strip which has a unique combination of low thermal expansivity and high thermal conductivity. A low-expansivity metal disclosed in an alloy containing about 45-70% iron, 20-55% nickel, up to 25% cobalt, and up to 5% chromium which in powder form is mixed with a high-conductivity metal powder disclosed as substantially elemental iron, copper or nickel.

Abstract: An alloy, and shaped articles made therefrom, having high thermal expansion and/or high electrical resistivity with enhanced mechanical strength containing______________________________________ w/o ______________________________________ Copper 5-30 Nickel 5-30 Nitrogen 0.1-1.0 ______________________________________The balance at least 65-<85% manganese and varying amounts of other elements such as one or more of the elements C, Si, P, S, Mo, Co, Ti, V, Nb, Ta, Fe, Hf, Zr, B and Be which do not objectionably detract from the desired properties.