| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive dummy ball for barrel plating free from Pb, which solves a problem of deformation in the dummy ball made from a Sn-based alloy so as not to contaminate a plating solution in barrel plating. SOLUTION: The dummy ball for barrel plating includes one or two sorts of Ag of 5 mass% or less or Cu of 2 mass% or less, of 0.1 mass% or more, and the balance substantially Sn. The dummy ball preferably includes Ni of 0.01 mass% or more but 0.5 mass% or less.
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