Data Sheet: Low Resistance & Shunt Alloys

Learn more about each nickel speciality alloy

  • Low Resistance Copper Nickel Alloys - 49 Alloy

Copper-Nickel Alloys: CuNi44

49 Alloy CuNi44 offers high electrical resistivity and very low temperature coefficient of resistance (TCR). Due to its low TCR, it finds use in wire-wound precision resistors that can operate up to 400°C (750°F). This alloy is also capable of developing a high and constant electromotive force when coupled with copper. This property allows it to be used for thermocouple, thermocouple extension and compensating leads. It is easily soldered, welded, and offers good corrosion resistance against atmospheric conditions.


Alloy Werkstoff Nr UNS designation DIN
CuNi44 2.0842 C72150 17644

Nominal Chemical Composition (%)

Alloy Ni Mn Fe Cu
CuNi44 Min 43.0 Max 1.0 Max 1.0 Balance

Physical Properties (at room temperature)

Alloy Density Specific Resistance
(Electrical Resistivity)
Thermal Linear
Expansion Coeff.
b/w 20 - 100°C
Temp. Coeff.
of Resistance
b/w 20 - 100°C
Operating Temp.
of Element
  g/cm³ µΩ-cm 10-6/°C ppm/°C °C
CuNi44 8.90 49.0 14.0 Standard ±60 600
Special ±20

Mechanical Properties (for cold drawn annealed wire)

Alloy Tensile strength
% at L0=100 mm
Min Max Min Max
CuNi44 420 520 15 35

Size Range

Form Dia Width Thickness
mm mm mm
Wire 0.15 - 12.0 - -
Strip - 10 - 80 ≥ 0.10
Ribbon - 2.0 - 4.5 0.2 - 4.0


Typical applications for CuNi44 alloy include temperature stable potentiometers, industrial rheostats, electric motor starter resistances, volume control devices, to name a few.

For thermocouple applications, it is coupled with copper, iron, and Ni-Cr to form Type T, Type J, and Type E thermocouples, respectively.

Additional grades of Copper-Nickel alloys are also available. Please contact us for more information.

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Related Links


Nickel Alloys

Standard Nickel Grades:

Nickel-Manganese Alloys:

Nickel-Copper Alloys:

Welding Alloys Heating & Resistance

Nickel-Chromium Alloys:

Iron-Chrome-Aluminum Alloys

Nickel Chrome Iron Alloys Low Resistance & Shunt Alloys

Cu-Ni Low Resistance Alloys:

Cu-Mn-Ni Alloys:

Lamp Components & Alloys Thermocouple Alloys

Thermocouple Grade Alloys:

Extension and Compensating Grade Alloys:

Automotive Alloys

Alloys for Earth and Central Electrodes:

  • NiSi
  • NiCr15Fe
  • NiCr5SiMn
  • NiCr2SiMn
  • NiSi1Al1Y
Soft Magnetic Alloys

Temperature Compensating Alloys:

  • Ni30Fe
  • Ni31Fe
  • Ni32Fe

High Permeability Alloys:

  • SMA 50 (Ni50Fe)
Controlled Expansion Alloys
Dumet Wires
Clad Wires
  • Copper-Clad FeNi42
  • Copper-Clad FeNi60
  • Iron-Clad Nickel
  • Nickel-Clad Iron