copper nickel alloy constantant resistance wire
constantant resistance wire
CuNi resistance Alloy
Very good resistance to corrosion
Very good malleability
Very good solder ability
copper nickel alloy constantant resistance wire
CuNi constantan alloy
CuNi alloy Grade: Constantan, CuNi1, CuNi2, CuNi6, CuNi8, CuNi10, CuNi14, CuNi19, CuNi23, CuNi30, CuNi34, CuNi40 (6J40), CuNi44.
Our product are in the form of wire, ribbon, strip, foil.
Constantan (CuNi44)
CuNi44, also called Constantan, has a very low temperature coefficient, high electrical resistance, high ductility and non-corroding properties. It is suitable for use at temperatures up to 600°C (1110°F). As a very malleable, very ductile alloy, it has a very good resistance to oxidation.
The alloy is non-magnetic. It is suitable for electrical resistors, potentiometers, heating wires, heating cables and mats. Ribbons are used for heating of bimetals. Another field of application is manufacturing of thermocouples because it develops a high electromotive force (EMF) in association with others metals.
Dimension available
Wire: 0.018-10mm Ribbons: 0.05*0.2-2.0*6.0mm
Strip: 0.005*5.0-5.0*250mm
Bars: OD 4-100mm
Chemical Composition
Alloy | Ni% | Mn% | Fe% | Cu% |
CuNi44 | 43 | Max 0.5 | - | Bal |
Physical Data
Density |
8.9 g/cm3 |
Specific Heat | 0.41(J/kg 20°C) |
Electrical Resistivity | 0.049×10-6ohm.m |
Melting Point | 1210°C |
Maximum Operating Temperature | 600°C |
Coefficient of linear expansion (coeff 10-6/°C) | 14 from 20 to 1000°C |
Typical Mechanical Properties
Mechanical Properties | CuNi44 |
Tensile Strength | 420 Mpa |
Elongation | 25% |
CuNi alloy wireis typically used in heating cables, fuses, resistors and various types of controllers.
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 weiding wire)
Chemical composition and main properties
Chemical Composition and Main Property of Cu-Ni Low Resistance Alloy | ||||||||
Properties\Grade | CuNi1 | CuNi2 | CuNi6 | CuNi8 | CuMn3 | CuNi10 | ||
Main Chemical Composition | Ni | 1 | 2 | 6 | 8 | _ | 10 | |
Mn | _ | _ | _ | _ | 3 | _ | ||
Cu | Bal | Bal | Bal | Bal | Bal | Bal | ||
Max Continuous Service Temperature(º C) | 200 | 200 | 200 | 250 | 200 | 250 | ||
Resisivity at 2º C (Ω mm2/m) | 0.03 | 0.05 | 0.1 | 0.12 | 0.12 | 0.15 | ||
Density(g/cm3) | 8.9 | 8.9 | 8.9 | 8.9 | 8.8 | 8.9 | ||
Thermal Conductivity(α × 10-6º C) | < 100 | < 120 | < 60 | < 57 | < 38 | < 50 | ||
Tensile Strength(Mpa) | ≥ 210 | ≥ 220 | ≥ 250 | ≥ 270 | ≥ 290 | ≥ 290 | ||
EMF vs Cu(μ Vº C)(0~10º C) | -8 | -12 | -12 | -22 | _ | -25 | ||
Approximate Melting Point(º C) | 1085 | 1090 | 1095 | 1097 | 1050 | 1100 | ||
Micrographic Structure | austenite | austenite | austenite | austenite | austenite | austenite | ||
Magnetic Property | non | non | non | non | non | non | ||
| ||||||||
Properties\Grade | CuNi14 | CuNi19 | CuNi23 | CuNi30 | CuNi34 | CuNi44 | ||
Main Chemical Composition | Ni | 14 | 19 | 23 | 30 | 34 | 44 | |
Mn | 0.3 | 0.5 | 0.5 | 1 | 1 | 1 | ||
Cu | Bal | Bal | Bal | Bal | Bal | Bal | ||
Max Continuous Service Temperatureº C) | 300 | 300 | 300 | 350 | 350 | 400 | ||
Resisivity at 2º C (Ω mm2/m) | 0.2 | 0.25 | 0.3 | 0.35 | 0.4 | 0.49 | ||
Density(g/cm3) | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | ||
Thermal Conductivity(α × 10-6º C) | < 30 | < 25 | < 16 | < 10 | < 0 | < -6 | ||
Tensile Strength(Mpa) | ≥ 310 | ≥ 340 | ≥ 350 | ≥ 400 | ≥ 400 | ≥ 420 | ||
EMF vs Cu(μ Vº C)(0~10º C) | -28 | -32 | -34 | -37 | -39 | -43 | ||
Approximate Melting Point(º C) | 1115 | 1135 | 1150 | 1170 | 1180 | 1280 | ||
Micrographic Structure | austenite | austenite | austenite | austenite | austenite | austenite | ||
Magnetic Property | non | non | non | non | non | non | ||
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