The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 06, 1979
Filed:
Feb. 02, 1978
John K Abraham, Broadview Heights, OH (US);
Peter J Vander Arend, Brecksville, OH (US);
Republic Steel Corporation, Cleveland, OH (US);
Abstract
High strength low alloy steels, produced as strip or the like by hot rolling, permit unusual economy of alloying ingredients while achieving superior mechanical properties. With a composition containing specifically low carbon and low manganese, and moderate proportions of both columbium and vanadium, preferably with no requirement of silicon. Yield strengths in a range to and above 80 ksi are attainable depending on the total of columbium and vanadium, and excellent properties of toughness and formability are exhibited in transverse as well as longitudinal directions without adding special sulfide shape control agents. Processing conditions, for hot rolling and coiling, can be selected over wide temperature ranges, for convenience of control, e.g. to achieve product uniformity. Rolling load requirements are acceptable and can be reduced to facilitate production of thin strip by reducing the ratio of columbium to vanadium, without impairing the way in which columbium appears to effectuate superior realization of the strengthening effect of vanadium in those compositions.