Copper alloy for electronic instruments

Details Copper alloy for electronic instruments Copper alloy for electronic instruments

1989-02-08

1991-06-04

Dean, R.

Metal treatment

Stock

Copper base

420470, 420471, 420473, 420476, C22C 902, C22C 906

Patent

active

050211056

ABSTRACT:
A copper alloy for electronic instruments is disclosed which comprises 2.0 to 7.0 wt. % of Sn, 1.0 to 6.0 wt. % in total amount of at least one kind of Ni, Co and Cr, o.1 to 2.0 wt. % of Si, and the remainder of Cu and unavoidable impurities, thereby further the content of O.sub.2 in unavoidable impurities being not more than 50 ppm, the content of S being not more than 20 ppm, and the average particle diameter of precipitates being not larger than 10 .mu.m. As the uses of such copper alloys, lead material for semiconductor elements and connector, socket, spring and terminal for electronic and electric instruments are claimed.

REFERENCES:
patent: 4656003 (1987-04-01), Miyafuji et al.
patent: 4822560 (1989-04-01), Oyama et al.

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