Resistance Wire Material Specifications Omega Resistance Wire deliver high quality materials in various forms, if you need help or want to place and order our dedicated team are waiting to assist you.
Omega Resistance Wire manufactures resistance wire from a variety of specialised materials – which can be grouped under the following principal headings - Nichrome, Cupro nickel, Iron Chrome Aluminium and Nickel Iron. Within these material groups, there is a wide range of alloys, each developed for a specific application. Refer to the table below for material specifications and typical applications.
The materials outlined below represent the most common alloys for each material group, and will be the alloy of choice for the majority of resistance wire applications. However, other resistance alloys are also available in stock, so please contact us if the material you require is not shown.
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|Resistivity µΩ/cm||Density g/cm³||Coeff. Linear Exp. µm/m°C
(20 - 1000c)
|Max Op. Temp. °C||Service Properties & Applications|
|80/20||108||8.35||17.5||1150||Contains long life additions making it suitable for applications subject to frequent switch and wide temperature fluctuations. Control resistors, high temperature furnace, soldering irons.|
|60/16||112||8.16||17.5||1100||Balance mainly iron and long life additions. Suitable for less exacting applications. Electric heaters, furnaces.|
|37/18||105||7.95||18.0||1050||Balance mainly iron. Used in furnaces with atmospheres which may otherwise cause dry corrosion for higher nickel content materials. Electric heaters and furnaces.|
|CuNi 44||49||8.90||14.0||400||Medium resistivity and low temperature coefficient of resistance make it ideal for resistors. Also thermocouples, heating wires.|
|CuNi 30||37||8.90||15.7||500||High resistance to oxidation and chemical corrosion. Resistors, cables, detectors for fuses.|
|CuNi 6||10||8.90||16.2||300||Characterised by low resistivity. High resistance to oxidation and corrosion. Tube electrical welding fittings, ribbons for bi-metals.|
|Iron Chrome Aluminium|
|ICA 135||135||7.25||14.0||1300||Ferromagnetic alloy should be used in dry environment to avoid corrosion. Can become embrittled at high temperatures. Furnace heating elements.|
|ICA 145||145||7.10||15.1||1350||As for ICA 135, but operates at higher temperatures. Furnace heating elements.|
|Ni 42||63||8.12||5.3 - 8.0||300||A low and constant expansion factor up to 300°C enables use in high temperature thermostats. Glass to metal seals, thermostat rods.|
|Ni 48||41||8.20||8.7 - 10.3||450||Coefficient of expansion approximately equals that of soft glasses of soda lime and lead oxide types. Glass to metal seals.|
|Ni 52||43||8.25||10.1 - 10.7||450||A controlled expansion alloy particularly suitable for seals with soft glasses. Glass to metal seals.|
|NiFeCo||49||8.36||5.3 - 6.2||400||A very low coefficient of expansion closely matches medium hard boro-silicate glasses. High performance glass to metals seals.|
|200||9.6||8.90||13.3||325||Commercially pure nickel. Good mechanical and corrosion resistance properties. Components for electrical and chemical industries.|
|212||10.9||8.86||12.9||325||Increased heat resistance due to addition of manganese. Component in bulbs and electron tubes, lead wiring.|
BS EN ISO 9001:2008
BS EN AS9100 AND BS EN AS9120