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:
Dec. 02, 1986
Filed:
May. 28, 1985
Applicant:
Inventor:
Robert E Sanders, Jr, New Kensington, PA (US);
Assignee:
Aluminum Company of America, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22F / ;
U.S. Cl.
CPC ...
148 / ; 148439 ; 148440 ;
Abstract
Aluminum armor plate containing relatively high amounts of magnesium, 6-10%, along with about 0.1-1% manganese and up to 0.23% chromium is made by cold rolling aluminum alloy rolling stock to a cold reduction of at least 10% with or without prior hot rolling. Susceptibility to stress conversion cracking is overcome by heating the alloy to an elevated temperature of typically 600.degree. or 700.degree. F. or more followed by cooling the alloy at a controlled cooling rate of at least 10.degree. F. per minute. The heating and the cooling precede the cold rolling operation and may be associated with hot rolling if such is employed.