Constantan
Constantan is a proprietary name for a copper–nickel alloy also known as Eureka, Advance, and Ferry. It usually consists of 55% copper and 45% nickel. Its main feature is the low thermal variation of its resistivity, which is constant over a wide... Wikipedia
Density (ρ): 8885 kg/m3
Elongation (ε) at break: ~0.25%
Melting temperature (Tm): 1210 °C
Surface resistivity: 0.56 μΩ·m
Tensile strength (σt): ~450 MPa
Thermal conductivity (k): 21.2 W/(m·K)
Young's modulus (E): 162 GPa