China Eureka Copper Nickel Resistance Wire / Wires, Find details about China Eureka, Constantan from Eureka Copper Nickel Resistance Wire / Wires
Characteristic | Resistivity ( 200C μ Ω . m) | Max. working Temperature ( 0C) | Tensile Strength (Mpa) | Melting point (0C) | Density ( g/cm3) | TCR x10-6/ 0C (20~600 0C) | EMF vs Cu (μ V/ 0C) (0~100 0C) |
Alloy Nomenclature | |||||||
NC003 (CuNi1) | 0.1 | 200 | ≥ 250 | 1095 | 8.9 | < 100 | -12 |
Physical Properties | Metric | Comments |
Density | 8.94 g/cc | |
Mechanical Properties | Metric | Comments |
Tensile Strength, Ultimate | 262 - 531 MPa | |
Tensile Strength, Yield | 276 - 524 MPa | Depending on temper |
Elongation at Break | 46.0 % | in 50.8 mm. |
Modulus of Elasticity | 115 GPa | |
Poissons Ratio | 0.310 | Calculated |
Machinability | 20 % | UNS C36000 (free-cutting brass) = 100% |
Shear Modulus | 44.0 GPa | |
Electrical Properties | Metric | Comments |
Electrical Resistivity | 0.0000120 ohm-cm @Temperature 20.0 ° C | |
Thermal Properties | Metric | Comments |
CTE, linear | 17.5 µ m/m-° C @Temperature 20.0 - 300 ° C | |
Specific Heat Capacity | 0.380 J/g-° C | |
Thermal Conductivity | 64.0 W/m-K @Temperature 20.0 ° C | |
Melting Point | < = 1125 ° C | Liquidus |
Liquidus | 1125 ° C | |
Processing Properties | Metric | Comments |
Annealing Temperature | 565 - 815 ° C | |
Hot-Working Temperature | 815 - 950 ° C | |
Component Elements Properties | Metric | Comments |
Copper, Cu | > = 91.2 % | |
Iron, Fe | 1.30 - 1.70 % | |
Lead, Pb | < = 0.050 % | |
Manganese, Mn | 0.30 - 0.80 % | |
Nickel, Ni | 4.80 - 6.20 % | |
Zinc, Zn | < = 1.0 % |
CuNi44 Chemical Content, %
Ni | Mn | Fe | Si | Cu | Other | ROHS Directive | |||
Cd | Pb | Hg | Cr | ||||||
44 | 1% | 0.5 | - | Bal | - | ND | ND | ND | ND |
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 |
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.