Metal treatment – Stock – Copper base
Patent
1998-06-18
2000-07-25
Sheehan, John
Metal treatment
Stock
Copper base
420496, 420499, C22C 900
Patent
active
060932651
ABSTRACT:
A copper alloy having improved resistance to stress relaxation contains controlled additions of iron, phosphorous and magnesium. Free magnesium, in solid solution with the copper, increases the alloy's resistance to stress relaxation. Copper alloys of the invention retain at least 70% of the initial stress following exposure to a temperature of 105.degree. C. for 3000 hours, making the alloys particulary useful for electrical connector components.
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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.
ASM Handbook.RTM.Formerly Tenth Edition, vol. 2, "Properties and Selection: Nonferrous Alloys and Special-Purpose Materials" (Jan. 1992) pp. 260-263 and p. 295.
Olin Corporation
Rosenblatt Gregory S.
Sheehan John
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