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:
Jun. 04, 1991
Filed:
Oct. 19, 1989
Ichiro Iwai, Tochigi, JP;
Hiroyuki Eda, Tochigi, JP;
Showa Aluminum, Osaka, JP;
Abstract
A brazeable aluminum alloy sheet consisting essentially of 0.8 to 1.3 wt % of Mn, 0.2 to 0.7 wt % of Si, one or two of 0.04 to 0.1 wt % of In and 0.1 to 2.0 wt % of Zn, the balance being aluminum and unavoidable impurities. The brazeable aluminum alloy sheet is produced by a process which comprises preparing an ingot of aluminum alloy containing 0.8 to 1.3 wt % of Mn and 0.2 to 0.7 wt % of Si, the balance being aluminum and unavoidable impurities, hot rolling the aluminum mass at a temperature of 350.degree. to 450.degree. C. without conducting a homogenizing treatment, conducting a first part of cold rolling on the hot rolled aluminum alloy, conducting a process annealing on the aluminum alloy at a temperature of 350.degree. to 420.degree. C., and conducting a second part of cold rolling on the annealed aluminum alloy at a draft percentage of 20 to 40%.