alumel

Alumel is an alloy consisting of approximately 95% nickel, 2% aluminium, 2% manganese, and 1% silicon. This magnetic alloy is used to make the negative conductors of ANSI Type K (chromel-alumel) thermocouples and thermocouple extension wire. Alumel is a registered trademark of Concept Alloys, Inc.

{| class="wikitable" |+Properties of Alumel (95% Ni, 2% Al, 2% Mn, 1% Si) |- | Electrical resistivity | 0.294 μΩ m |- | Temperature coefficient | 23.9×10−4 K−1 |- | Curie point | 152 °C |- | Density | 8.61 g cm−3 |- | Melting point | 1399 °C |- | Tensile strength (annealed) | 586 MPa |- | Tensile strength (stress relieved) | 1030 MPa |- | Tensile strength (hard) | 1170 MPa |- | Coefficient of thermal expansion | 12×10−6K−1 at 20 °C |- | Specific heat | 0.523 J g−1 K−1 |- | Thermal conductivity | 29.7 W m−1 K−1 |- |}