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. 09, 2001
Filed:
Apr. 07, 1999
Applicant:
Inventors:
Assignee:
Sumitomo Metal Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C 3/842 ; C22C 3/844 ;
U.S. Cl.
CPC ...
C22C 3/842 ; C22C 3/844 ;
Abstract
An austenitic stainless steel of the present invention has the following chemical composition based on percent by weight: C: 0.05% or less, Si: 1.0% or less, Mn: 2.0% or less, P: 0.04% or less, S: 0.01% or less, Ni: from 12 to 27%, Cr: from 15 to 26%, Cu: over 3.0 to 8.0%, Mo: over 2.0 to 5.0%, Nb: 1.0% or less, Ti: 0.5% or less, W: 5.0% or less, Zr: 1.0% or less, Al: 0.5% or less, N: under 0.05%, Ca: 0.01% or less, B: 0.01% or less, rare earth elements: 0.01% or less in total, and the balance Fe and unavoidable impurities. The austenitic stainless steel has excellent sulfuric acid corrosion resistance and excellent workability.