Abstract: Multiple gauge metal strip is prepared by a process which comprises shaping strip material of rectangular cross section to form regions of at least two variable thicknesses defining a stepped surface configuration in at least one of the broad surfaces of said strip, and drawing the shaped strip through a die which defines said cross sectional configuration to produce a reduction of said strip to final dimension, wherein said drawing step is performed without direct surface-to-surface contact between said strip and said die, such that the width dimension of said strip is unchanged and the ratio of strip surface to strip cross sectional area changes by at least 30%. The drawing method of this invention employs hydrodynamic lubrication and can achieve one-pass cross sectional reductions of from 39 to 55%.

Abstract: 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.

Abstract: 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.

Abstract: A method of producing multiple gauge metal strip wherein surface reduction is confined to an area comprising from about 5 to about 50% of total surface area, and volume reduction ranges from about 10 to about 60% of initial strip cross section area, which comprises measuring the maximum stock removal in relation to the yield strength of said strip, adjusting a shaving apparatus to prevent it from exceeding said maximum and passing the strip through said apparatus. The method of this invention may be practiced as a single pass procedure.

Abstract: 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.

Abstract: The present invention relates to aluminum base alloys having high strength and high ductility prepared by working at a temperature of from 450.degree. to 950.degree.F, working at a temperature below 450.degree.F, holding at from 250.degree. to 650.degree.F, and working at a temperature below 450.degree.F.