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:
May. 22, 1979
Filed:
Jan. 10, 1978
Rudolf Oppenheim, Krefeld, DE;
Heinrich Kiesheyer, Krefeld, DE;
Helmut Brandis, Krefeld, DE;
Gustav Lennartz, Krefeld, DE;
Rainer Thielmann, Krefeld, DE;
Thyssen Edelstahlwerke AG, Krefeld, DE;
Abstract
Described herein is a ferritic chrome-molybdenum-nickel steel, containing specified amounts of niobium, zirconium and aluminum, of high chemical resistance against general and intercrystalline corrosion attack, as well as against pitting, crevice and stress corrosion in chloride-containing solutions. The described steel is useful for the fabrication of articles which must exhibit a 0.2-limit of at least 520 N/mm.sup.2 at room temperature; a notched bar impact strength of at least 40 J at 0.degree. C. and at least 70 J at 20.degree. C. in 3-mm U-notch impact specimens; and guaranteed for flat stock such as sheet or strip material up to at least 10 mm thickness and for bar material of at least 60 mm diameter, round of square.