Copper alloy material for parts of electronic and electric...

Details Copper alloy material for parts of electronic and electric... Copper alloy material for parts of electronic and electric...

2007-02-06

2007-02-06

Ip, Sikyin (Department: 1742)

Metal treatment

Stock

Copper base

C420S476000

Reexamination Certificate

active

10354151

ABSTRACT:
A copper alloy material for parts of electronic and electric machinery and tools contains 1.0 to 3.0 mass % of Ni, 0.2 to 0.7 mass % of Si, 0.01 to 0.2 mass of Mg, 0.05 to 1.5 mass % of Sn, 0.2 to 1.5 mass % of Zn, and less than 0.005 mass % (including 0 mass %) of S, with the balance being Cu and inevitable impurities, wherein the copper alloy material has:(1) a specific crystal grain diameter, and a specific ratio between the longer diameters of a crystal grain on a cross section parallel or perpendicular to a direction of final plastic working; and/or(2) a specific surface roughness after the final plastic working.

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