J. L. C. Electromet Private Limited

Constantan (CuNi 44 Alloy): A Copper-Nickel alloy. High specific resistance alloy used in wire-wound precision resistors, potentiometers, volume control devices, winding heavy-duty industrial rheostats and electric motor resistances.

Also used as thermocouple alloy with Copper (Type T), Iron (Type J), and Ni-Cr (Type E). It is available with grade wires and extension wires.

JLC Mang (CuNi4 Mn11 Alloy): A Copper-Nickel-Manganese alloy. Used in precision electrical measuring apparatus, resistors and shunts.

Properties:

Alloy	Specific Resistance (µ Ω-cm)	Density (g/cm³)	Linear Expansion Coeff. (T=20-100°C) 10-6/°C	Temp. Coeff. Of Resistance x10-6/°C	Specific Heat (20°C) J/Kg°C
Manganin	43.0	8.41	18	±15 (15-35°C)	397
Shunt	38.5	8.40	18	±15 (40-60 °C)	397

Size Range:

• Wire: 12.0 mm diameter to 0.15mm diameter
• Strip: Width 0.4-80 mm, Thickness: 0.10 and above

30 Alloy; 15 Alloy; 10 Alloy; 12 Alloy; 5 Alloy: In the Copper-Nickel alloys, lower the resistivity, lower is the temperature coefficient of resistance. These alloys are used as general resistance wires, cores of low temperature heaters, resistance elements of heaters for electrical circuit breakers/fuses.

Nominal Composition:

Alloy	Ni%	Cu%
30 Alloy	23	Bal.
15 Alloy	11	Bal.
10 Alloy	6	Bal.
12 Alloy	8	Bal.
5 Alloy	2	Bal.

Typical Tensile Strength:

Alloy	30 Alloy	15 Alloy	12 Alloy	10 Alloy	5 Alloy
Tensile strength Min-Max (N/mm²)	340 - 690	250 - 540	250 - 540	230 - 680	220 - 440
Elongation % (Approx.: Annealed)	25	25	25	20	20