Abstract: An electrical contact comprising a silver-coated stainless steel strip, which has an underlying layer comprising any one of nickel, cobalt, nickel alloys, and cobalt alloys, on at least a part of the surface of a stainless steel substrate, and has a silver or silver alloy layer formed as an upper layer, in which a copper or copper alloy layer with a thickness of 0.05 to 2.0 ?m is provided between the silver or silver alloy layer and the underlying layer; and a producing method of the above-described electrical contact, in which the silver-coated stainless steel strip is subjected to a heat-treating in a non-oxidative atmosphere.

Abstract: A silver-coated composite material for movable contact includes a base material composed of an alloy whose main component is iron or nickel, an under layer which is formed at least on part of the surface of the base material and which is composed of any one of nickel, cobalt, nickel alloy and cobalt alloy, an intermediate layer which is formed on the under layer and which is composed of copper or copper alloy and an outermost layer which is formed on the intermediate layer and which is composed of silver or silver alloy, and wherein a total thickness of the under layer and the intermediate layer falls within a range more than 0.025 ?m and less than 0.20 ?m.

Abstract: An electrical contact comprising a silver-coated stainless steel strip, which has an underlying layer comprising any one of nickel, cobalt, nickel alloys, and cobalt alloys, on at least a part of the surface of a stainless steel substrate, and has a silver or silver alloy layer formed as an upper layer, in which a copper or copper alloy layer with a thickness of 0.05 to 2.0 ?m is provided between the silver or silver alloy layer and the underlying layer; and a producing method of the above-described electrical contact, in which the silver-coated stainless steel strip is subjected to a heat-treating in a non-oxidative atmosphere.

Abstract: A copper-based deposited alloy strip for a contact material has a maximum value of a difference not larger than 100 MPa among three of tensile strengths, that are a tensile strength in a rolling direction thereof, a tensile strength in a direction crossing the rolling direction with an angle of 45 degrees, and a tensile strength in a direction crossing the rolling direction with an angle of 90 degrees. A process for producing the copper-based deposited alloy strip for a contact material includes the steps of: performing a solution heated treatment on a copper alloy strip; and performing an aging heat treatment on the copper alloy strip.

Abstract: A silver-coated stainless steel strip for movable contacts, which has an underlying layer comprising any one of nickel, cobalt, nickel alloys, and cobalt alloys, on at least a part of the surface of a stainless steel substrate, and has a silver or silver alloy layer formed as an upper layer, in which a copper or copper alloy layer with a thickness of 0.05 to 2.0 ?m is provided between the silver or silver alloy layer and the underlying layer; and a producing method of the above-described silver-coated stainless steel strip, in which said strip is subjected to a heat-treating in a non-oxidative atmosphere.