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Formula: Cu 86/Mn 12/Ni 2
Form: Wire
Material: Copper/Manganese/Nickel (Manganin®)
Commodity: Alloys
Manganin® Spooled Wire, a copper–manganese–nickel alloy, is distinguished by its stable resistivity, negligible temperature coefficient, and long-term durability, making it ideal for precision resistive elements. The spooled form ensures efficient handling, consistent winding, and ease of integration into electronic devices. Industries such as metrology, cryogenics, and high-pressure physics rely on Manganin® Spooled Wire for applications where resistance stability and low thermal drift are critical. Specific uses include precision resistors for calibration, reference leads in thermoelectric measurements, and high-pressure wire gauges. Research demonstrates its stability in thermophysical properties across a wide temperature range, including cryogenic conditions, while maintaining predictable thermoelectric power and resistance under stress. These qualities make Manganin® Spooled Wire indispensable in advanced instrumentation and experimental physics. By combining electrical reliability with processing convenience, it continues to be a cornerstone material in research and industrial applications requiring exacting precision.

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Tolerances

Wire
Diameter ±10%
Length +5% / -1%

Material Properties for Alloys

Mechanical Properties
Element Value
Elongation at break( % ) 50
Modulus of elasticity( GPa ) 124-159
Izod impact strength( J m⁻¹ ) 107
Tensile strength( MPa ) 300-600
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 43-48
Temperature coefficient( K⁻¹ ) 0.00001
Thermal Properties
Element Value
Maximum use temperature in air( C ) 300
Melting point( C ) 960
Thermal conductivity( W m⁻¹ K⁻¹ ) 22@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 14-19@20-100°C
Physical Properties
Element Value
Density( gcm⁻³ ) 8.4

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