Douglas W Graham

US Patent:

40100464, Mar 1, 1977

Filed:

Mar 4, 1976

Appl. No.:

5/663661

Inventors:

William C. Setzer - Creve Coeur MO
Richard D. Lanam - Hamden CT
Joseph Winter - New Haven CT
Douglas L. Graham - Ballwin MO

Assignee:

Swiss Aluminium Ltd. - Chippis

International Classification:

C22D 104

US Classification:

148 115A

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.

US Patent:

39946959, Nov 30, 1976

Filed:

Nov 5, 1975

Appl. No.:

5/629100

Inventors:

William C. Setzer - Creve Coeur MO
Philip R. Sperry - North Haven CT
Joseph Winter - New Haven CT
Douglas L. Graham - Ballwin MO

Assignee:

Swiss Aluminium Ltd. - Chippis

International Classification:

B32B 1520

US Classification:

291975

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.