Chromel

Chromel is an alloy made of approximately 90% nickel and 10% chromium by weight that is used to make the positive conductors of ANSI Type E (chromel-constantan) and K (chromel-alumel) thermocouples. It can be used at temperatures up to 1,100 °C (2,010 °F) in oxidizing atmospheres. Chromel is a registered trademark of Concept Alloys, Inc.

Characteristics and properties of chromel (Ni, 90%; Cr, 10% by weight)
Characteristic Value
Temperature coefficient 0.00032 K−1
Electrical resistivity 0.706 μΩ m
Mechanical
Elongation at break <44%
Izod impact strength 108 J m−1
Modulus of elasticity 186 GPa
Tensile strength 620–780 MPa
Physical
Density 8.5 g cm−3
Melting point 1420 °C
Magnetic Non-Magnetic
Thermal
Coefficient of thermal expansion 12.8×10−6 K−1 at 20–1000 °C
Maximum use temperature in air 1100 °C
Thermal conductivity 19 W m−1 K−1 at 23 °C
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.