Beryllium copper alloy and method of manufacturing beryllium...

Details Beryllium copper alloy and method of manufacturing beryllium... Beryllium copper alloy and method of manufacturing beryllium...

2006-09-08

2009-12-08

Ip, Sikyin (Department: 1793)

Metal treatment

Stock

Copper base

C420S485000, C420S486000, C420S487000, C420S488000

Reexamination Certificate

active

07628873

ABSTRACT:
A beryllium copper alloy is provided, having a thickness “t” in a range from 0.05 mm to 0.5 mm and having an alloy composition consisting by weight (or mass %), of Cu100−(a+b)NiaBeb, wherein 1.0≦a≦2.0, 0.15≦b≦0.35, and 5.5 ≦a/b≦6.5. The beryllium copper alloy also exhibits a 0.2% proof stress equal to or above 650 MPa, an electric conductivity equal to or above 70% IACS, and a bending formability defined by a ratio of R/t=0, wherein “R” is a maximum bend radius before cracking at a bent portion when the beryllium copper alloy is bent into a V shape at a right angle.

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“Journal of the Japan Copper and Brass Research Association”, Japan Copper and Brass Association, 1976, vol. 15, pp. 154.

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