Low Resistance & Shunt Alloys

Cu-Ni Low Resistance Alloys:

49 Alloy (CuNi44)
30 Alloy (CuNi23)
15 Alloy (CuNi11)
12 Alloy (CuNi8)
10 Alloy (CuNi6)
5 Alloy (CuNi2)
2.5 Alloy (CuNi1)

Cu-Mn-Ni Alloys:

JLC Mang 38
JLC Mang 43

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.

Specifications
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			Maximum Operating Temp. of Element
	g/cm³	µΩ-cm		10^-6/°C		ppm/°C			°C
CuNi44	8.90	49.0		14.0		Standard		±60	600
CuNi44	8.90	49.0		14.0		Special		±20	600
Mechanical Properties (for cold drawn annealed wire)
Alloy			Tensile strength N/mm²				Elongation % at L₀=100 mm
Alloy			Min		Max		Min		Max
CuNi44			420		520		15		35

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

Applications

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.

Copper-Nickel Alloys: Grades with Low Resistance

JLC Alloy 30, JLC Alloy 15, JLC Alloy 12, JLC Alloy 10 and JLC Alloy 5

These alloys are characterized by low electrical resistivity and low temperature coefficient of resistance. They provide good resistance against oxidation and chemical corrosion. They are easily soldered. Typical applications of these alloys are for electrical resistors and general resistance wire for heating wires, cables, and mats. They are also used as resistance elements of heaters for electrical circuit breakers/fuses in heating cables with low temperatures. In ribbon form, they are used for heating bimetals.

Specifications & Nominal Chemical Composition (%)
Alloy			Werkstoff Nr		DIN		Ni		Cu
JLC Alloy 30			2.0881		–		23		Balance
JLC Alloy 15			2.0811		17471		11		Balance
JLC Alloy 12			–		–		8		Balance
JLC Alloy 10			2.0807		17471		6		Balance
JLC Alloy 5			2.0802		17471		2		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		Maximum Operating Temp. of Element
	g/cm³	µΩ-cm		10^-6/°C		ppm/°C		°C
JLC Alloy 30	8.90	30		15.7		180		400
JLC Alloy 15	8.90	15		16.0		350-450		400
JLC Alloy 12	8.90	12		16.2		480		300
JLC Alloy 10	8.90	10		16.2		500-900		300
JLC Alloy 5	8.90	5		16.4		1000-1600		300

Mechanical Properties (for cold drawn annealed wire)
Alloy	Tensile strength N/mm²		Elongation % at L₀=100 mm
Alloy	Min	Max	Min		Max
JLC Alloy 30	340	690	15		35
JLC Alloy 15	250	540	15		35
JLC Alloy 12	250	540	15		35
JLC Alloy 10	230	680	15		35
JLC Alloy 5	220	440	15		35
Size Range
Form	Dia	Width		Thickness
Form	mm	mm		mm
Wire	12 – 0.15	–		–
Strip	–	10 – 80		2.0 – 4.5
Ribbon	–	≥ 0.10		0.2 – 4.0

Copper-Manganese-Nickel Alloys: Wire / Strip

JLC Mang series is of copper-nickel alloys that are used for electrical and controlled resistance applications. These alloys have very low temperature coefficient of resistance, and offer uniform electrical resistance over long periods of time. Additionally, they have very low thermal electromotive force (EMF) against copper. These alloys have good workability, can be soldered, as well as welded. In addition to the two grades listed below, other variants of copper-nickel alloys are also available. Please contact JLC for more details.

Specifications
Alloy	British Standard		Werkstoff Nr		UNS designation
JLC Mang 38	–		–		–
JLC Mang 43	–		2.1362		–
Nominal Chemical Composition (%)
Alloy		Ni		Mn		Cu
JLC Mang 38		2 – 4		10 – 12		Balance
JLC Mang 43		2 – 4		11 – 13		Balance

Physical Properties (at room temperature)
Alloy	Density	Specific Resistance (Electrical Resistivity)	Thermal Linear Expansion Coeff. between 20-1000 °C	Temp. Coeff. of Resistance	Thermal EMF against Copper at 20°C
Alloy	g/cm³	µΩ-cm	10^-6/°C	x 10^-6/°C	µV/K
JLC Mang 38	8.40	38.5	18	±15 (Range 40-60 °C)
JLC Mang 43	8.41	43.0	18	±15 (Range 15-35 °C)	Standard: -1.00; Special ±0.20
Mechanical Properties (for cold drawn annealed wire)
Alloy		Tensile strength N/mm²		Elongation % at L₀=100 mm
Alloy		Min	Max	Min	Max
JLC Mang 38		350	450	15	30
JLC Mang 43		350	450	15	30

Size Range
Form	Dia	Width	Thickness
Form	mm	mm	mm
Wire	12.0 – 0.15	–	–
Strip	–	0.4 – 80	≥ 0.10

Applications

These alloys are used for manufacturing resistance standards, precision electrical measurement instruments such as potentiometers, and are standard materials for precision, standard, and shunt resistors. Due to their low EMF against copper, they are used in electrical circuits where an erratic thermal EMF can lead to malfunctioning of the circuit.