COPPER ALLOY MATERIAL FOR ELECTRIC AND ELECTRONIC COMPONENTS

摘要

A copper alloy material for electric/electronic components according to the present invention is characterized in that a average grain size of 1 to 50 µm that is designated by ((a+b)/2) in which a thickness of a grain is defined to be (a) and a width thereof is defined to be (b) which is on a cross section that is vertical to a rolling direction, an aspect ratio (a/b) thereof is between 0.5 and 1.0, an aspect ratio (a/b) of a grain before performing a bend working and an aspect ratio (a' /b') of which a grain is effected by a tensile stress after performing a bend working of 90 degrees satisfy the following (Formula 1) of: 2 ‰¤ a + b / a¹ / b¹ ‰¤ 15
and the copper alloy material has a bending workability to be excellent.