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CuNi44 6J40 Copper Based Alloys Wire For Ignition / Spark Plug 1280℃ Melting Point

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China Ohmalloy Material Co.,Ltd certification
China Ohmalloy Material Co.,Ltd certification
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CuNi44 6J40 Copper Based Alloys Wire For Ignition / Spark Plug 1280℃ Melting Point

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Large Image :  CuNi44 6J40 Copper Based Alloys Wire For Ignition / Spark Plug 1280℃ Melting Point Get Best Price

Product Details:
Place of Origin: China
Brand Name: Ohmalloy
Certification: ISO CE RHOS UL SGS
Model Number: Ohmalloy 049/CuNi44/6J40
Payment & Shipping Terms:
Minimum Order Quantity: 50kgs
Price: $15-$28
Packaging Details: spool+plywood
Delivery Time: 7 workdays
Payment Terms: T/T, L/C, D/A, D/P, , MoneyGram
Supply Ability: 80000 kg/week
Detailed Product Description
Resistivity(μΩ.cm): 49 TCR(ppm/K): -80 To+40
Density (g/cm3): 8.9 Tensile Strength: 420MPa
Shape: Wire/ribbon/strip/foil/bar Melting Point (℃): 1280
High Light:

co ni alloy


copper nickel alloy

Constantan( Ohmalloy 049) 
(Common Name: CuNi45, NC50.Cuprothal, Alloy 294, Cuprothal 294, Nico, MWS-294, Cupron, Copel, Alloy 45, Neutrology, Advance, CuNi 102, Cu-Ni 44, Konstantan,constantan.)


OhmAlloy049 is a copper-nickel alloy (Cu56Ni44 alloy) characterized by high electrical resistance, high ductility and good corrosion resistance. It is suitable for use at temperatures up to 400°C

Typical applications for OhmAlloy49 are temperature-stable potentiometers, industrial rheostats and electric motor starter resistances.

The combination of negligible temperature coefficient and high resistivity makes the alloy particulary suitable for the winding of precision resistors.

OhmAlloy049 is manufactured from electrolytic copper and pure nickel. In finer wire sizes the alloy is designated as OhmAlloy49TC(Thermocouple).

Normal composition%

Nickel 45 Manganese 1
Copper Bal.    


Typical Mechanical properties(1.0mm)

Yield strength Tensile Strength Elongation
Mpa Mpa %
250 420 25


Typical Physical properties

Density (g/cm3) 8.9
Electrical resistivity at 20℃ (Ωmm2/m) 0.49
Temperature factor of resistivity(20℃~600℃)X10-5/℃ -6
Conductivity coefficient at 20℃ (WmK) 23
EMF vs Cu(μV/℃ )(0~100℃ ) -43


Coefficient of thermal expansion
Temperature Thermal Expansion x10-6/K
20 ℃- 400℃ 15
Specific heat capacity
Temperature 20℃
J/gK 0.41


Melting point (℃) 1280
Max continuous operating temperature in air (℃) 400
Magnetic properties non-magnetic


Corrosion resistance performance





Working In atmosphere at 20℃

Working at max temperature 200℃

Air and oxygen contain


gases with Nitrogen

gases with sulfur


gases with sulfur


OhmAlloy049 good good good good bad good


Style of supply

Alloys Name Type Dimension
OhmAlloy049W Wire D=0.03mm~8mm
OhmAlloy049R Ribbon W=0.4~40 T=0.03~2.9mm
OhmAlloy049S Strip W=8~200mm T=0.1~3.0
OhmAlloy049F Foil W=6~120mm T=0.003~0.1
OhmAlloy049B Bar Dia=8~100mm L=50~1000

The thermocouple alloy wires with different varieties and specifications of our company can be applied in all kinds of thermocouples, the temperature ranges from -270℃ to 1800℃. The thermocouple alloy wires have excellent performance and are extensively used in the temperature measurement and control in different fields, such as metallurgy, chemical industry, petroleum industry, machinery-electric industry, energy industry, agriculture and military industry. Our products conform to the standards of IEC584 -1and IEC-2 and ANSI96-1.



Excellent thermoelectricity, excellent linear relationship between thermoelectrical potential and the temperature.
Excellent thermoelectrical stability, high accuracy.

Main technical data:
Thermocouple variety, index and temperature measurement range.

CuNi44 6J40 Copper Based Alloys Wire For Ignition / Spark Plug 1280℃ Melting Point 0

CuNi44 6J40 Copper Based Alloys Wire For Ignition / Spark Plug 1280℃ Melting Point 1

Contact Details
Ohmalloy Material Co.,Ltd

Contact Person: Jiang

Tel: +8613795230939

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