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:
Jan. 06, 2004
Filed:
Feb. 27, 2002
Applicant:
Inventors:
Assignee:
Daido Tokushuko Kabushiki Kaisha, Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C 3/818 ; C22C 3/840 ; C22C 3/842 ; C22C 3/826 ; C22C 3/828 ;
U.S. Cl.
CPC ...
C22C 3/818 ; C22C 3/840 ; C22C 3/842 ; C22C 3/826 ; C22C 3/828 ;
Abstract
A high-hardness martensitic stainless steel excellent in corrosion resistance, comprising less than 0.15% by weight of C, from 0.10 to 1.0% by weight of Si, from 0.10 to 2.0% by weight of Mn, 0.010% or less of S, from 12.0 to 18.5% by weight of Cr, from 0.40 to 0.80% by weight of N, less than 0.030% by weight of Al, less than 0.020% by weight of O, and substantially the balance of Fe. The martensitic stainless steel of the present invention has cold-workability and hardness after tempering higher than that of SUS420J2 and corrosion resistance equivalent to or higher than that of an austenitic stainless steel SUS316.