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An alloy containing 90% nickel and 10% chromium, used to form the chromel-alumel thermocouple.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



an alloy of nickel and chromium characterized by a favorable combination of thermoelectric properties and heat resistance. Chromel contains about 10 percent Cr, about 1 percent Co, and several impurities, specifically, up to 0.2 percent C and up to 0.3 percent Fe. It has a rather high and almost linear variation of thermoelectromotive force over a wide temperature range. The thermoelectromotive force of a chromel-platinum thermocouple at temperatures of 1000° and 0°C is about 33 millivolts. Chromel maintains a constant thermoelectromotive force during prolonged operation in air at temperatures ranging between 20° and 1000°C; at higher temperatures, its service reliability is reduced.

Chromel is manufactured in the form of wires and is paired with alumel as a positive thermoelectrode in a chromel-alumel thermocouple, which is used for measuring temperatures. Chromel is also used as compensating wires. In the USSR, types NKh9.5 and NKh9 chromels are manufactured.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Twenty-five 30 gauge Chromel Alumel thermocouples (Omega Engineering, Stamford, Connecticut, USA) connected to two underground Campbell CR10 data loggers (Campbell Scientific, North Logan, Utah, USA) were placed horizontally under the litter layer at the mineral soil surface in the first 13 transect plots extending in each direction from the base of the L.
Type K thermocouples are formed by welding together a Chromel (nickel with 10% chromium) wire and an Alumel (nickel with 5% aluminum silicon) wire and are suitable for measuring temperature differences from -200[degrees]C to +1,350[degrees]C.
When the furnace had reached the predefined temperature, the sample (base and insert) was lowered into the hottest place (1320[degrees]C) of the furnace by using chromel wire and held there for 30 min after which it was subjected to air cooling to room temperature.