COPPER ALLOY PLATE MATERIAL FOR ELECTRIC AND ELECTRONIC COMPONENTS

摘要

An copper alloy strip material for electrical/electronic components according to the present invention is characterized in that such the copper alloy strip material for electrical/electronic components includes: Ni as between 1.5 mass% and 4.0 mass%; Si as between 0.3 mass% and 1.5 mass%; and the balance being Cu and unavoidable impurities, wherein a mean roughness Ra of a surface roughness is not larger than 0.3 µm regarding the strip in a direction as right angle to a direction of a rolling therefor, a maximum height Ry thereof is not higher than 3.0 µm regarding the same therein, and there is positioned a peak position regarding a frequency curve, that represents a concave component of the surface roughness and/or a convex component thereof, at the plus side (the side for the convex component) comparing to an average value of the curve for meaning the surface roughness.