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Jiangyin Senphus Electrical Material Co., Ltd.

Resistance Wire, Heat Resistant Electrical Wire, CuNi 44 manufacturer / supplier in China, offering Constantan Wire Copper Nickel Resistance Wire 6j4/Cn49W, Silicone Rubber Insulation Heating Wire of UL Approved, Electric Blankets Heating Wire UL 1285 UL1080 and so on.

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Supplier Homepage Product alloy wire Constantan Wire Copper Nickel Resistance Wire 6j4/Cn49W

Constantan Wire Copper Nickel Resistance Wire 6j4/Cn49W

FOB Price: US $10 / Piece
Min. Order: 1 Piece
Min. Order FOB Price
1 Piece US $10/ Piece
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Port: Shanghai, China
Production Capacity: 100 Tons / Month
Payment Terms: T/T

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Basic Info
  • Model NO.: 6J4/CN49W
  • Material: Cu, Ni
  • Color: Bright
  • Component: Ni 44%, Cu Balance
  • Transport Package: Carton, Wooden Case
  • Origin: Jiangyin
  • Product Type: Wire
  • Carbon Content: Low Carbon
  • Diameter: 0.03 to 2mm
  • Trademark: Chengxin
  • Specification: Rohs
  • HS Code: 74082900
Product Description
Constantan Wire Copper Nickel Resistance Wire Cn49W

Constantan Wire Copper Nickel Resistance Wire 6j4/Cn49W
Constantan wire
1. Anti-corrosion
2. Cu, ni wire
3. Main materail of heating cable
NameThe main parts (%)Resistance Temperature Coefficient 10 -6 / ° C (20-100° C)Resistance
μ Ω M
(20° C)
Tensile Strength
N/MM 2
G/CM 3
The melting point
° C
° C

40Ni, bal, Cu-40|+40-0.49≥ 6-15390|8758.901200

Constantan is an alloy of nickel (about 40%), copper (about 60%) and manganese (2%).
Constantan has a silver and yellow color. Melting Point - 1260ºC, density - 8.9 g/cm3, thermal expansion coefficient is 14h10 -61/ºC, it has a constant electrical resistance, high thermoelectric power.
This material is very ductile due to nickel in its composition, it lends itself well to machining, soldering and welding, stamping, corrosion resistant, and resistant to high temperature, in cold state is not influenced by low concentrated acid environments, resistant to ammonia vapors, except steam heated to 200-500ºC.
Constantan exists in three types of rolled products: in form of wire, strip and circle.
Constantan wire is manufactured according to GOST1790-77, which covers wire used for thermocouples production and GOST5307-77, which regulates manufacturing of cold-drawn wire of circular cross section used for electrical purposes.
Constantan wire is available in diameter from 0.1 mm to 10.0 mm in hard and soft state.
Constantan strip is made according to GOST5189-75, which defines conditions for manufacturing cold-rolled constantan strips for industrial applications as a material of high electrical resistance.
The thickness of constantan strip ranges from 0.1 mm to 5.0 mm, width - 10.0 mm to 300.0 mm.
Strip may be of soft and hard state. By accuracy of manufacturing: normal accuracy in thickness, normal accuracy in width; normal accuracy in thickness and increased accuracy in width; increased accuracy in thickness and normal accuracy in width; increased accuracy in thickness and increased accuracy in width.
By length: random.
Chemical structure, in %, GOST492-2006 
constantan wire
Electrical Resistance WireCuNi44
NameChemical Composition(%)
Ni (Nickel)44
MAX.Continusus serice Temperature°C400°C
Resistivity 20°C(mm²)0.48(±0.03)
Elongation at Rupture25-30%
Tensile strength Mpa>390
Melting Point 1280
Density g/cm38.9
TCRx10-6 /°C+40
ASTERMET LLC delivers constantan and other thermocouple wire from stock and by order. Besides wire, it is also possible to deliver constantan strip, plate and circle. The quality of services provided, professional managers, short delivery and reasonable prices are distinguishing us from other companies.
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