Sumitomo Electric Industries, Limited

Daigo Sato

Takumi Akada

Shinei Takamura

Takaaki Enomoto

A copper-coated steel wire includes a core wire made of a steel and a coating layer that covers the outer peripheral surface of the core wire and is made of copper or a copper alloy. In a cross section perpendicular to the longitudinal direction of the core wire, the ten-point average roughness Rzjis of the outer peripheral surface of the core wire is 50% or more and 250% or less of the thickness of the coating layer.

Copper-coated steel wire, stranded wire, insulated electric wire, and cable

A copper-coated steel wire includes a core wire made of a stainless steel, and a coating layer made of copper or a copper alloy and covering an outer peripheral surface of the core wire. In a cross section perpendicular to a longitudinal direction of the core wire, the outer peripheral surface of the core wire has a value of an arithmetic mean roughness Ra of not less than 25% and not more than 90% of a thickness of the coating layer.

Copper-coated steel wire, spring, stranded wire, insulated electric wire, and cable

A copper-coated steel wire includes a core wire made of a steel and a coating layer made of copper or a copper alloy which covers an outer peripheral surface of the core wire. The coating layer includes an intermediate layer which is disposed in a region including the interface with the core wire and has a higher zinc concentration than a remaining region of the coating layer.

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Osaka, Japan

Daigo Sato