Good conductivity and high tensile strength

March 2017 — With their low mechanical strength, the range of application for conductors of pure copper is limited. Isabellenhuette’s “Isa-Con” material, however, combines conductivity and tensile strength optimally. Wires with both of these properties are elementary for certain tasks.

The brand designation stands for copper-based alloys that have been developed by Isabellenhuette, a manufacturer of high-tech alloys, producing them in the form of wires. The “Isa-Con” 414 and 1000 material types currently form the focus of the production programme. The designations consist of the brand name and the minimum tensile strength (TS) in MPa (N/mm²). Both alloys have a considerably higher TS than copper 200 MPa, and the TS of the Isa-Con 1000 wires is considerably higher even than that of wires made from copper-clad stainless steel (“Staku”), which is around 700 MPa. The other important property is electrical conductivity: for pure copper, it is 58 x 106 S/m, which is equivalent to 100%, IACS (International Annealed Copper Standard). At 90% IACS when annealed, the Isa-Con 414 material comes very close to copper. The high-strength material Isa-Con 1000, at 60% IACS, is also considerably more conductive than the widely used copper-clad stainless steel wires, which achieve 40% IACS. Isa-Con 414 is a RoHS-compliant material that can replace similar materials containing cadmium and fulfils the requirements of the ASTM B624 norm (Standard Specification for High-Strength, High-Conductivity Copper-Alloy Wire for Electronic Application). The high-strength material Isa-Con 1000 contains the alloy elements silver and zircon. Wires made of both materials are able to intercept high tensile loads elastically, have a high degree of hardness, are corrosion resistant and retain their properties for long periods of use, even at higher temperatures. The ability to coat the wires with nickel, tin or silver is also advantageous during certain applications.

Availability and applications

Isa-Con wires are delivered as round and stranded wires with diameters ranging from 0.05mm to 0.3mm. Isa-Con 414 wires are also available in rods with diameters ranging from 0.8mm to 1.2mm. Typical fields of application are signal and overhead wires for railways and automotive cables. In light of the need to save space and weight, the automotive industry and other sectors require conductive wires with the smallest possible diameters (“miniaturisation”) that are also able to reliably fulfil increasingly strict demands in terms of load capacity and required service life. The same applies to contact elements for plugs and switches, which are also made of wire. In general, there are a multitude of possible applications Isabellenhuette’s wires in the growing fields of energy supply, generation and management and data transfer.

Isabellenhutte Co, Interwire 2017, booth 1600

Isabellenhuette Heusler GmbH+Co. KG
Eibacher Weg 3-5
35683 Dillenburg/Germany
Contact person is Mr. Uwe Schwarzbach
Phone: +49 2271 934-0

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