Swiss Aluminium Ltd.

Douglas L Graham

Joseph Winter

William C Setzer

Richard D Lanam

Michael J Pryor

Philip R Sperry

A clip exhibiting improved corrosion resistance and reduced weight is processed by a drawing operation which is preferably conducted without interannealing treatments and which may employ a variation of drawing speeds. The clip of the present invention is prepared from an aluminum base alloy comprising from about 0.05-6.0% silicon, about 0.10-0.8% iron, about 0.02-0.3% copper, up to 1.0% manganese and up to 7.0% magnesium. The resulting clips possess comparable tensile properties to conventional tin and zinc-coated steel clips with an economy of processing.

Method for preparing an aluminum clip

A method of extruding aluminum base alloys having high strength and high electrical conductivity properties which comprises providing an aluminum base alloy containing from 0.04 to 1.0% iron, from 0.02 to 0.2% silicon, from 0.1 to 1.0% copper, from 0.001 to 0.2% boron, balance essentially aluminum; heating the cast alloy ingot or billet to a desired extrusion temperature, extruding the material, cooling the extruded product, drawing down the cooled product, and finally aging the drawn product. The alloy material utilized may be homogenized before being extruded.

Method of extruding aluminum base alloys

A composite aluminum alloy brazing sheet and methods of producing the brazing sheet are disclosed. The brazing sheet includes a non-heat treatable aluminum base alloy core containing zirconium, chromium and manganese as the alloying ingredients. Bonded to at least one of the major face surfaces of the core is an aluminum base alloy sheet containing silicon plus optional additions of copper, zinc and magnesium. The core alloy resists softening and sagging at brazing temperatures while retaining good mechanical properties after the brazing operation is completed.

Composite aluminum brazing sheet

A cooking utensil formed from a high temperature aluminum base alloy component exhibiting favorable formability, said aluminum base alloy component comprising from about 0.1-0.7% zirconium, 0.1-0.4% chromium, 0.3-1.5% manganese, and the balance essentially aluminum and having at least a first and a second major surface, said second major surface being in opposing relationship to said first major surface; a glass or ceramic first covering from about 40 to 100% of the surface area of said first major surface, said glass or ceramic being bonded to said aluminum base alloy component; and a heat resistant organic resin coating over said glass or ceramic component and said first major surface of said aluminum base alloy component.

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Ballwin, MO, United States of America

Douglas L Graham