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. 11, 2000
Filed:
Apr. 28, 1997
Yong Soo Park, 1000-3, Bangbae-Dong, Seocho-Ku, Seoul, KR;
Young Sik Kim, 600, Yongsang-Dong, Andong, Kyungsangbook-do, KR;
Other;
Abstract
A corrosion resistant duplex stainless steel having an austenite-ferrite duplex phase matrix, less content of the expensive nickel and higher the resistance to both stress corrosion cracking and pitting in environments containing chloride ion is disclosed. The stainless steel is also scarcely influenced by the aging heat treatment. This stainless steel includes 20-30 wt % chromium, 3-9 wt % nickel, 3-8 wt % molybdenum, 0.20 wt % or less carbon, 0.5-2.0% silicon, 3.5 wt % or less manganese, 0.2-0.5% nitrogen and a balance of iron. The stainless steel may include at least one element selected from the group of 1.5 wt % or less titanium, 3 wt % or less tungsten, 2 wt % or less copper, and 2 wt % or less vanadium and include at least one element selected from the group of 0.001-0.01 wt % boron, 0.001-0.1 wt % magnesium, 0.001-0.1 wt % calcium, and 0.001-0.2 wt % aluminum.