Plated wires and alloy wires for electronic parts
Sumitomo Electric develops and manufactures materials for reed switches and electrode materials for discharging negative ions, by applying technologies for nickel alloy wires (designed exclusively for plug materials).
Sumitomo Electric’s Dumet wires are made from composite materials: iron-nickel alloy wires (whose thermal expansion coefficient is close to that of glass) and copper (characterized by high conductivity). For half a century, these products have been used as lead wires for various electronic parts.
Sumitomo Electric has various surface treatment technologies. Notably, electroplating technologies (gold, silver, tin, nickel) are applied to copper and brass wires or ribbons depending on the application.
The smooth wire surface helps minimize the generation of metal powder on guides of wire electrical discharge machines, enabling continuous use for many hours.
Metal materials for spark plug electrodes
Sumitomo Electric develops nickel alloy wires custom-designed for plug materials to meet the various needs required of gasoline engines.
Conductors for electric wires
These conductors are used for covered wires. Copper wires, tin-bearing copper wires, silver-bearing copper alloy wires, are used. The lineup includes bare wires, molten tin-plated wires, electroplated wires (tin, nickel, silver), and other plated wires. Sumitomo Electric offers two types of wires: single wires and stranded wires (bunch strands of single wires). Round wires and tape wires (rolled foil) are also available.