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:
Apr. 23, 1991
Filed:
Jul. 05, 1989
Applicant:
Inventors:
Assignee:
Aichi Steel Works, Ltd, Aichi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ;
U.S. Cl.
CPC ...
148 / ; 72274 ; 72700 ;
Abstract
A high strength non-magnetic stainless steel comprising, by weight ratio, less than 0.20% C, less than 1.00% Si, 14-16% Mn, less than 0.005% S, 0.2-1.0% Ni, 15-19% Cr, 0.30-0.40% N, and Fe and other impurity elements, of which C+N constitutes 0.40-0.55% and the Mn equivalent equals 30-33. The stainless steel has a hardness more than Hv 500, a magnetic permeability less than 1.01 after drawing, the steel may be suitably used as the steel for the micro shafts of video tape recorders and electromagnetic valves.