Metal treatment – Stock – Copper base
Patent
1997-07-22
1999-11-09
Sheehan, John
Metal treatment
Stock
Copper base
420496, 420499, C22C 900
Patent
active
059806567
ABSTRACT:
A copper alloy achieves high electrical conductivity, in excess of 70% IACS; high strength, ultimate tensile strength in excess of 75 ksi; good surface cosmetics; and good stampability, above 25% break, by controlled additions of magnesium, iron and phosphorous. There is a critical iron content to achieve both good stampability and high electrical conductivity and a critical phosphorous content to achieve high strength and relatively small metal phosphide particles. There is further, a critical relationship between the amount of iron and phosphorous. An additions of magnesium, in amounts of more than 0.03%, broadens the effective ratio of iron to phosphorous, widening the composition box of the alloys of the invention.
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patent: 4202688 (1980-05-01), Crane et al.
patent: 4305762 (1981-12-01), Caron et al.
patent: 4605532 (1986-08-01), Knorr et al.
patent: 5334346 (1994-08-01), Kim et al.
Metals Handbook.RTM. Ninth Edition, vol. 14, "Forming and Forging" (Dec. 1989) p. 447.
Breedis John F.
Brenneman William L.
Olin Corporation
Rosenblatt Gregory S.
Sheehan John
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