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:
Jul. 20, 1982
Filed:
Jun. 16, 1980
Applicant:
Inventors:
Koshi Katoh, Tsushima, JP;
Takayoshi Shimizu, Tokai, JP;
Assignee:
Daido Tokushuko Kabushiki Kaisha, Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ; C22C / ;
U.S. Cl.
CPC ...
7512 / ; 7512 / ; 7512 / ; 7512 / ; 7512 / ; 7512 / ; 7512 / ; 7512 / ; 7512 / ; 7512 / ; 148 37 ;
Abstract
Ferritic stainless steel having excellent machinability and local corrosion resistance comprises 21-30% chromium, less than 0.020% carbon, less than 0.050% nitrogen, 0.4-3.5% silicon, less than 3.0% manganese, 1.0-5.0% molybdenum, 0-3.0% vanadium, 0-5.0% nickel, and at least one element selected from the group consisting of 0.05-0.20% sulfur, 0.05-0.30% selenium, 0.05-0.30% tellurium, 0.01-0.20% lead, 0.01-0.20% bismuth and 0.005-0.065% calcium. When from 0.3-3.0% vandium is included the Si content should be 0.4-0.7%. When no vanadium is included the Si content should exceed 1% but not 3%.