Evanohm® Foil

Evanohm® Foil is a precision resistance alloy consisting of approximately 75% nickel, 20% chromium, 2.5% copper, and 2.5% aluminum, optimized for ultra-stable electrical performance across a broad temperature spectrum. It features a remarkably low temperature coefficient of resistance and excellent long-term stability, making it ideal for high-accuracy applications. In addition, it shows no anomalous rise in specific heat at cryogenic temperatures, avoiding issues common in other resistance materials like manganin or nichrome. Industries utilizing Evanohm® Foil include aerospace electronics, metrology, and high-reliability sensing systems. Specific uses include precision current-sense resistors in measurement instrumentation, stable resistance elements in aerospace-grade control systems, and cryogenic electronic components for scientific experiments. In research, its magnetic field insensitivity and resistance reproducibility make it indispensable for superconductivity studies, calibration systems, and advanced electronics development. Its combination of stability, reproducibility, and adaptability ensures a central role in precision engineering and scientific measurement.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Foil

Thickness	<0.01mm	±25%
Thickness	0.01mm - 0.05mm	±25%
Thickness	>0.05mm	±10%

Material Properties for Alloys

Mechanical Properties

Element	Value
Elongation at break( % )	33
Modulus of elasticity( GPa )	221
Izod impact strength( J m⁻¹ )	42-100
Tensile strength( MPa )	1210

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	134
Temperature coefficient( K⁻¹ )	0.00001

Thermal Properties

Element	Value
Maximum use temperature in air( C )	300
Melting point( C )	1340-1390
Specific heat( J K⁻¹ kg⁻¹ )	435@23°C
Thermal conductivity( W m⁻¹ K⁻¹ )	14.6@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	11.7@20-100°C