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Resistance Wires


Grade Designations And Chemical Composition For Nickel Alloy Resistance Wire

Material Designation Nearest Fit Ni Cu Cr Fe Mn Al
Symbol Number UNS Other Name
Nickel Chrome
NiCr8020 2.4869 NO6003 NiCr80/20 80.0 20.0
NiCr6015 2.4867 NO6004 NiCr60/16 60.0 15.0 25.0
NiCr3718 NiCr37/18 37.0 18.0 45.0
Copper Nickel
CuNi44 2.0842 N04401 Hecnum 44.0 55.0 1.0
CuNi30Mn 2.0890 - CuNi30 30.0 67.0 3.0
CuNi23Mn 2.0881 - CuNi23 23.0 75.0 2.0
CuNi10 2.0811 - Alloy 90 10.0 90.0
CuNi6 2.0807 C70300 Alloy 60 6.0 94.0
CuNi2 2.0802 C70200 Alloy 30 2.0 98.0
Iron Chrome Aluminium
CrAl20-5 1.4767 K92400 ICA135 20.0 75.0 5.0
CrAl25-5 1.4765 K92500 ICA145 23.0 71.0 6.0
Mechanical Properties Annealed Stainless Steel Header
Material Designation Nearest Fit Resistivity µOhms/cm Density G/cm3 Coefficient of Linear Expansion Thermal Conductivity
Symbol Number UNS Other Name µm/m.°C Temp.°C W/m.K
Nickel Chrome
NiCr8020 2.4869 NO6003 NiCr80/20 108 8.35 17.5 20-1000 15.0
NiCr6015 2.4867 NO6004 NiCr60/16 112 8.16 17.5 20-1000 13.3
NiCr3718 NiCr37/18 105 7.95 18.0 20-1000 13.0
Copper Nickel
CuNi44 2.0842 N04401 Hecnum 49 8.90 14.0 20-1000 21.1
CuNi30Mn 2.0890 - CuNi30 37 8.90 15.7 20-1000 29.0
CuNi23Mn 2.0881 - CuNi23 30 8.90 15.7 20-1000 35.0
CuNi10 2.0811 - Alloy 90 15 8.90 16.0 20-1000 60.0
CuNi6 2.0807 C70300 Alloy 60 10 8.90 16.2 20-1000 90.0
CuNi2 2.0802 C70200 Alloy 30 5 8.90 14.4 20-1000 160.0
Iron Chrome Aluminium
CrAl20-5 1.4767 K92400 ICA135 135 7.25 14.0 20-1000 16.5
CrAl25-5 1.4765 K92500 ICA145 145 7.10 15.1 20-1000 16.0
Mechanical Properties Annealed Stainless Steel Header
Material Designation Nearest Fit Service Properties Applications
Symbol Number UNS Other Name
NICKEL CHROME
NiCr8020 2.4869 NO6003 NiCr80/20 Contains long life additions making it eminently suitable for applications subject to frequent switching and wide temperature fluctuations. Can be used at operating temperatures up to 1150 °C. Control resistors, high temperature furnaces, soldering irons.
NiCr6015 2.4867 NO6004 NiCr60/16 A Ni/Cr alloy with balance mainly Iron, with long life additions. It is suitable for use up to 1100 °C, but the higher coefficient of resistance makes it suitable for less exacting applications than 80/20. Electric heaters, heavy duty resistors, electric furnaces.
NiCr3718 NiCr37/18 Balance mainly Iron. Suitable for continous operation up to 1050°C, in furnaces with atmospheres which may otherwise cause dry corrosion for higher nickel content materials. Electric heaters, electric furnaces (with atmospheres).
COPPER NICKEL
CuNi44 2.0842 N04401 Hecnum Medium resistivity combined with low temperature coefficient of resistance makes it ideal for resistors. It is suitable for temperatures up to 400°C. Thermocouples, resistors, heating wires and cables.
CuNi30Mn 2.0890 - CuNi30 High resistance to oxidation and chemical corrosion. Maximum working temperature is 500°C Resistors, heating cables and detectors for fuses.
CuNi23Mn 2.0881 - CuNi23 As above Resistors, heating cords and mats.
CuNi10 2.0811 - Alloy 90 High resistance to oxidation and chemical corrosion. Maximum working temperature is 400°C Low value resistors, heating wires and mats.
CuNi6 2.0807 C70300 Alloy 60 Characterised by low resistivity. High resistance to oxidation and corrosion. Maximum operating temperature is 300°C Tube electrical welding fittings, ribbons used for heating of bimetals.
CuNi2 2.0802 C70200 Alloy 30 As above. As above
IRON CHROME ALUMINIUM
CrAl20-5 1.4767 K92400 ICA135 A ferromagnetic alloy which can be used at temperatures up to 1300°C. Should be operated in dry surroundings to avoid corrosion. Can become embrittled at high temperatures. Heating elements of high temperature furnaces and radiant heaters.
CrAl25-5 1.4765 K92500 ICA145 Can be used in operating conditions up to 1350°C, although can become embrittled. Heating elements of high temperature furnaces and radiant heaters.