| 摘要 |
A Co-Si based copper alloy plate, comprising: Co: 0.5 to 3.0% by mass, Si: 0.1 to 1.0% by mass and the balance Cu with inevitable impurities, wherein the Co-Si based copper alloy plate satisfies the relationship {(60 degree specular gloss G(RD) in a rolling direction)-(60 degree specular gloss G(TD) in a direction transverse to rolling direction)}>=90%. |
