CLAD COIN AND A MANUFACTURING METHOD THEREOF

摘要

PURPOSE: A clad coin, and a manufacturing method thereof are provided to have same electric conductivity same with nickel, thereby having compatibility in existing vending machines. CONSTITUTION: A manufacturing method of a clad coin comprises a step of laminating an alloy layer on both sides of carbon steel of alloy steel to a sandwich shape. The copper alloy layer comprises 10-25 weight% of zinc, 5-20 weight% of nickel, and residual copper. A copper alloy layer additionally comprises 0.01-5 weight% of iron. The alloy steel is stainless steel. The electric conductivity of the clad coin is 4-7.5% IACS[International Annealed Copper Standard]. The clad coin is white.