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Constantan Alloy 6J40 Copper Nickel Foil with High Electrical Resistivity Low TCR and Excellent Corrosion Resistance for Precision Resistors

Detalhes do produto

Lugar de origem: China

Marca: Tankii

Certificação: ISO9001

Número do modelo: 6J40/CuNi44

Termos do pagamento & do transporte

Quantidade de ordem mínima: 30kg

Preço: 20-35USD /Kg

Detalhes da embalagem: Caso

Tempo de entrega: 15-30 dias

Termos de pagamento: T/T, União Ocidental

Habilidade da fonte: 50tons/month

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Especificações
Destacar:

Constantan alloy resistance foil

,

ultra-thin copper nickel strip

,

6J40 resistance alloy foil

Resistividade elétrica (20 ° C):
0,48 - 0,49 μΩ·m (48-49 μΩ·cm)
Coeficiente de resistência de temperatura (TCR):
±20 a ±40 ppm/°C (ajustável através de tratamento térmico)
Temperatura máxima de serviço contínuo:
400 ° C.
Densidade:
8,9 g/cm³
Ponto de fusão:
1280°C
Resistividade elétrica (20 ° C):
0,48 - 0,49 μΩ·m (48-49 μΩ·cm)
Coeficiente de resistência de temperatura (TCR):
±20 a ±40 ppm/°C (ajustável através de tratamento térmico)
Temperatura máxima de serviço contínuo:
400 ° C.
Densidade:
8,9 g/cm³
Ponto de fusão:
1280°C
Descrição
Constantan Alloy 6J40 Copper Nickel Foil with High Electrical Resistivity Low TCR and Excellent Corrosion Resistance for Precision Resistors

Constantan Alloy 6J40 Copper Nickel Foil / Ultra-thin Resistance Strip

Constantan 6J40 (also known as CuNi40, CuNi44, NC50, Eureka, Konstantan, or Cuprothal) is a copper-nickel precision resistance alloy containing approximately 40-44% nickel. It is characterized by high electrical resistivity, low temperature coefficient of resistance (TCR), and excellent corrosion resistance. The ultra-thin foil and strip forms are specifically designed for precision resistors, strain gauges, and shunt applications.

Element Content (%)
Nickel (Ni) 39 - 44%
Manganese (Mn) 1.0 - 2.0%
Copper (Cu) Balance
Iron (Fe) ≤0.5%
Silicon (Si) ≤0.5%
Cadmium (Cd) ND (Not Detected)
Lead (Pb) ND
Mercury (Hg) ND
Chromium (Cr) ND


Physical & Electrical Properties

Property Value
Electrical Resistivity (20°C) 0.48 - 0.49 μΩ·m (48-49 μΩ·cm) 

Temperature Coefficient of Resistance (TCR) ±20 to ±40 ppm/°C (adjustable through heat treatment) 

Maximum Continuous Service Temperature 400°C 

Density 8.9 g/cm³ 

Melting Point 1280°C 
Thermal EMF vs. Copper (0-100°C) -43 μV/°C 

Thermal Conductivity 21.2 - 23 W/m·K 

Thermal Expansion Coefficient (20-100°C) 14.9 - 15 × 10⁻⁶/°C 

Specific Heat 0.41 J/g·K 


Mechanical Properties

Condition Tensile Strength Elongation
Annealed (Soft) 340 - 535 MPa ≥25% 

Cold Rolled 680 - 1070 MPa ≥2% 

Typical Yield Strength 250 MPa


Key Applications

  • Precision foil resistors and chip resistors

  • Strain gauges and load cells

  • Current sensing shunts and ammeter shunts

  • Thermocouple compensation wires (Type J and Type T negative element)

  • Potentiometers and industrial rheostats

  • Temperature-stable resistors for instrumentation

  • Heating elements and heating cables

  • Bimetal heating applications

  • Aerospace and industrial electronic

Constantan Alloy 6J40 Copper Nickel Foil with High Electrical Resistivity Low TCR and Excellent Corrosion Resistance for Precision Resistors 0

Constantan Alloy 6J40 Copper Nickel Foil with High Electrical Resistivity Low TCR and Excellent Corrosion Resistance for Precision Resistors 1

Constantan Alloy 6J40 Copper Nickel Foil with High Electrical Resistivity Low TCR and Excellent Corrosion Resistance for Precision Resistors 2

Constantan Alloy 6J40 Copper Nickel Foil with High Electrical Resistivity Low TCR and Excellent Corrosion Resistance for Precision Resistors 3

Constantan Alloy 6J40 Copper Nickel Foil with High Electrical Resistivity Low TCR and Excellent Corrosion Resistance for Precision Resistors 4

Constantan Alloy 6J40 Copper Nickel Foil with High Electrical Resistivity Low TCR and Excellent Corrosion Resistance for Precision Resistors 5

Constantan Alloy 6J40 Copper Nickel Foil with High Electrical Resistivity Low TCR and Excellent Corrosion Resistance for Precision Resistors 6

Constantan Alloy 6J40 Copper Nickel Foil with High Electrical Resistivity Low TCR and Excellent Corrosion Resistance for Precision Resistors 7

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