Cuni25 (B25) /C71300/ Cw350h Cupronickel Alloy Strip (CuNi25/C71300)

Product Description

Cuni25 (B25) /C71300/ Cw350h Cupronickel Alloy Strip (CuNi25/C71300)Material: CuNi10Fe, CuNi19, CuNi23, CuNi25, CuNi30MnFe, CuNi30Fe2Mn2 in form of strip/plate Resistance material: CuNi1, CuNi2, CuNi2Si, CuNi4, CuNi6, CuNi10, CuNi23Mn, CuNi25, CuNi30Mn, CuNi44, CuMn12Ni2 in form of wire/ribbon and strip As a big manufacturer and exporter in China on the line of electric resistance alloy, we can supply all kinds of electric resistance alloy wire and strips (resistance steel wire and strips), General Description Due to has high tensile strength and increased resistivity values,  copper nickel alloy wires are the first choice for applications as resistance wires. With the different nickel amount in this product range, the characteristics of the wire can be chosen according to your requirements. Copper nickel alloy wires are available as bare wire, or enamelled wire with any insulation and self-bonding enamel. Furthermore, litz wire made of enamelled copper nickel alloy wire are available.
      0.02x100mm Constantan strip Copper Nickel Alloy CuNi44 foil Chemical Content, %
Ni Mn Fe Si Cu Other ROHS Directive
Cd Pb Hg Cr
44 1% 0.5 - Bal - ND ND ND ND
Mechanical Properties
Max Continuous Service Temp 400ºC
Resisivity at 20ºC 0.49±5%ohm mm2/m
Density 8.9 g/cm3
Thermal Conductivity -6(Max)
Melting Point 1280ºC
Tensile Strength,N/mm2   Annealed,Soft 340~535 Mpa
Tensile Strength,N/mm3   Cold Rolled 680~1070 Mpa
Elongation(anneal) 25%(Min)
Elongation(cold rolled) ≥Min)2%(Min)
EMF vs Cu, μV/ºC (0~100ºC) -43
Micrographic Structure austenite
Magnetic Property Non
main specifications and main technical parameter of resistance alloy constantan wire
main property    type NC003 Cuni1 NC005 CuNI2 NC010 CuNI6 NC015 CuNI10 NC025 CuNi19 NC030 CuNi23 NC035 CuNi30 NC040 CuNi34 NC050 CuNI44
main chemical composition Ni 1 2 6 10 19 23 30 34 44
MN / / / / 0.5 0.5 1.0 1.0 1.0
CU rest rest rest rest rest rest rest rest rest
max working temperature / 200 220 250 300 300 350 350 400
density g/cm3 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9
resistivity at 20 °c 0.03 ±10% 0.05 ±10% 0.10 ±10% 0.15 ±10% 0.25 ±5% 0.30 ±5% 0.35 ±5% 0.40 ±5% 0.49 ±5%
temperature coefficient of resistance <100 <120 <60 <50 <25 <16 <10 -0 <-6
tensile strength mpa >210 >220 >250 >290 >340 >350 >400 >400 >420
elongation >25 >25 >25 >25 >25 >25 >25 >25 >25
melting point °c 1085 1090 1095 1100 1135 1150 1170 1180 1280
coefficient of conductivity 145 130 92 59 38 33 27 25 23
Application of Constantan Constantan is a copper-nickel alloy that contains specific minor amounts of additional elements to achieve precise values for the temperature coefficient of resistivity. Careful control of melting and conversion practices results in a very low level of pinholes at ultra-thin thicknesses. The alloy is used extensively for foil resistors and strain gauges.