Abstract: A corrosion resistant, soft magnetic, ferritic steel alloy, a useful article made therefrom, and a method of using the alloy are described. The alloy has the following composition in weight percent. C 0.005-0.040 Mn  1.0 max. Si  1.0 max. P 0.050 max. S 0.020 max. Cr  27.0-30.0 Ni  0.35 max. Mo  0.35 max. Cu  0.35 max. Co  0.25 max. N 0.010-0.05 The balance is essentially iron and the usual impurities found in similar grades of ferritic stainless steels. In accordance with another aspect of this invention, there is disclosed a magnetic component for a magnetically actuated device such as a solenoid valve wherein the magnetic component is formed of the aforesaid alloy. In accordance with a further aspect of this invention, there is disclosed a solenoid valve that incorporates a movable magnetic core that is formed of the aforesaid alloy.

Abstract: A corrosion resistant, soft magnetic, ferritic steel alloy, a useful article made therefrom, and a method of using the alloy are described. The alloy has the following composition in weight percent. 1 C 0.005-0.040 Mn  1.0 max. Si  1.0 max. P 0.050 max. S 0.020 max. Cr  27.0-30.0 Ni  0.35 max. Mo  0.35 max. Cu  0.35 max. Co  0.25 max. N 0.010-0.

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: In a process for making a low thermal expansion, high thermal conductivity member or article suitable for bonding to a support member at a predetermined bonding temperature and for facilitating heat transfer therefrom, and in the member made thereby, first and second metal powders are combined in volumetric proportions to provide an approximation to desired thermal expansion and thermal conductivity characteristics. The powder mixture is then consolidated in a controlled manner to provide a shaped member having a thermal expansion characteristic curve that essentially matches that of the support member from about 30.degree. C. up to the bonding temperature. Consolidation of the metal powder mixture is controlled by selecting a density for the consolidated powder that results in the close expansion match over the temperature range and then consolidating the metal powder mixture to that density.

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.