Patent ID: 8637164

Claim:
A silver-coated composite material for movable contact parts, which has: an underlying layer composed of any one of nickel, cobalt, a nickel alloy, and a cobalt alloy at least provided on a part of the surface of a stainless steel substrate; an intermediate layer composed of copper or a copper alloy provided thereon; and a silver or silver alloy layer provided thereon as an outermost layer, wherein a thickness of the underlying layer is 0.01 to 0.2 μm, wherein a thickness of the intermediate layer is 0.05 to 0.3 μm, wherein an average grain size of the silver or silver alloy provided as the outermost layer is 0.5 to 5.0 μm, wherein the outermost layer contains less than 5% of a copper component, and wherein the silver or silver alloy layer provided as an outermost layer comprises silver or silver alloy grains arranged in one layer.