Cu-Zn ALLOY STRIP EXCELLENT IN THERMAL SEPARATION RESISTANCE FOR Sn PLATING AND Sn-PLATED STRIP THEREOF

摘要

Disclosed is a Cu-Zn alloy strip which is improved in thermal separation resistance for Sn plating. Also disclosed is such a Cu-Zn alloy strip plated with Sn. Specifically disclosed is a Cu-Zn alloy strip consisting of 15-40% by mass of Zn and the balance of Cu and unavoidable impurities, wherein the total concentration of P, As, Sb and Bi is controlled to be 100 ppm by mass or less, the total concentration of Ca and Mg is controlled to be 100 ppm by mass or less, and the concentrations of O and S are respectively controlled to be 30 ppm by mass or less.