Shanghai, China
Management System Certification:
ISO 9001
OEM/ODM Service
Sample Available
Russian Speaker

Constantan Wire, Constantan Alloy Wire, Electrical Wire manufacturer / supplier in China, offering CuNi40 Alloy Resistance Electric Copper Nickel Heating Wire, Thermocouple compensation wires and bare wire 0.711mm, Tankii alloy thermocouple connector and plug and so on.

Gold Member Since 2008
Audited Supplier

CuNi40 Alloy Resistance Electric Copper Nickel Heating Wire

Get Latest Price
Purchase Qty. / Reference FOB Price
20-99 kg US $25
100-499 kg US $24
500-999 kg US $22
1,000-1,999 kg US $20
2,000+ kg US $18
Port: Shanghai, China
Production Capacity: 200 Tons/Year
Payment Terms: L/C, T/T, Western Union, Paypal
Product Type: Wire
Material: CuNi Alloy Wire
Carbon Content: None
PCD: None
ET: None
Hole: None

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Basic Info

Model NO.: CuNi40
Serves: Small Oreder Accepted
Sample Free: Available
Size: 0.01-10mm
Density: 8.9g/cm3
Elongation: 25%
Sample: Small Order Accepted
surface: Bright
Resisivity: 0.48
Trademark: TANKII
Transport Package: Coil Cartons, Pallet, Spools, Coils
Specification: ROHS, SGS
Origin: China
HS Code: 7408229000

Product Description

Product Description
      Constantan Wire with moderate resistivity and low temperature coefficent of resistance with a flat resistance/temperature curve over a wider range than the "manganins". Constantan also shows better corrosion resistance than the man ganins. Uses tend to be restricted to ac circuits.

     Constantan wire is also the negative element of the type J thermocouple with Iron being the positive; type J thermocouples are used in heat treating applications. Also, it is the negative element of the type T thermocouple with OFHC Copper the positive; type T thermocouples are used at cryogenic temperatures.


Chemical Content, %







ROHS Directive
















Mechanical Properties

Max Continuous Service Temp


Resisivity at 20ºC

0.49±5%ohm mm2/m


8.9 g/cm3

Thermal Conductivity


Melting Point


Tensile Strength,N/mm2   Annealed,Soft

340~535 Mpa

Tensile Strength,N/mm3   Cold Rolled

680~1070 Mpa



Elongation(cold rolled)


EMF vs Cu, μV/ºC (0~100ºC)


Micrographic Structure


Magnetic Property


CuNi40 Alloy Resistance Electric Copper Nickel Heating Wire 

CuNi40 Alloy Resistance Electric Copper Nickel Heating Wire
Packaging & Shipping

CuNi40 Alloy Resistance Electric Copper Nickel Heating Wire

Our Services

a) We can provide high quality material, excellent design, precise manufacturing,complete specifications, considerate and integrity serivices.

b)  We can provide all kinds of electric heating alloy material and elements, including customized products.

c)  We can provide a complete solution for you.

d)  OEM service can be provided.

e)  Product selection

f)  Process optimization

g)  New product development

Company Information

    Shanghai Tankii Alloy Material Co.,Ltd. is specialized in production of Ni-Cr Alloy, Cu-Ni Alloy, Fechral, thermocouple wire, pure nickel and other precision alloy materials in the form of wire, strip, rod, bar and plate.
We've already got ISO9001 quality system certification and ISO14001 environmental protection system.
We own a complete set of advanced production flow of refining, cold reduction, drawing and heat treating etc. We also proudly have independent R&D capacity.



Q: Concerning the supply ability of factory? 
A: About 10 tons of wire or strip per month.

Q: Technical supports?
A: We have our own development team for new project and professional technicial team.

Q: How do you ensure quality? 
A: We have QC who are reponsible for tracking and monitoring for whole production process. 
Accept customers' testing.

Q: What kind of logistics system do you have? 
A: We cooperate with large shipping company, for instance, CO,SCO, MSK, MSC, APL (U.S.) with
perfect distribution center to make sure the goods into customers in time.


Resistance Alloy- Constantan Strip Sizes / Temper Capabilities

  1.  Condition: Bright, Annealed, Soft 
  2.  Wire diameter 0.02mm-1.0mm packing in spool, big than 1.0mm packing in coil
  3.  Rod, Bar diameter 1mm-30mm 
  4.  Strip: Thickness 0.008mm-7mm, Width 1mm-280mm 

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