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Chromel.

 

 

Chromel is an alloy of chromium (8,7-10%) and Nickel (89-91%), characterized by a good combination of thermoelectric properties and heat resistance.

 

Description

Properties

 


Description:

Chromel is an alloy of chromium (Cr) (8,7-10%) and Nickel (Ni) (89-91%) with different additives of other metals: cobalt (Co) (1%), carbon (C) (0.2%), iron (Fe) (0.2%). Is characterized by good combination of thermoelectric properties and heat resistance.

Chromel is used for the manufacture of countervailing wires, rheostats, heating devices and thermocouples.

 


Properties:

– has a silver color,

has a large and almost linear change in thermal electromotive force (thermal EMF) for a large interval of temperatures,

– has a high resistance to oxidation

elongation at break of <44%,

– impact resistance of 108 j·m−1,

modulus of elasticity 186 GPA,

– tensile strength 620-780 MPa,

8 density 710 kg/m3,

– melting point of 1420 °C,

paramagnetic,

– the coefficient of thermal expansion of 15.7×10-6 K−1 at 800 °C,

the thermal conductivity of 17.6 W·m−1·K−1 at 20 °C, to 34.3 W·m−1·K−1 at 800 °C,

– heat resistant, maximum working temperature in air is 1100 °C,

temperature coefficient of linear expansion of 13.1·10-6 K−1 (0-100 °C),

– electrical resistivity of 6.8·10-7 Ω·m.