Thermocouple Alloys: Chromel KPX, Alumel KMX, Iron JPX & Constantan JNX

Thermocouple Alloys: Chromel KPX, Alumel KMX, Iron JPX & Constantan JNX

At National Electronic Alloys, we offer four different types of thermocouple alloys: Chromel KPX, Alumel KMX, Iron JPX & Constantan JNX. These alloys are commonly used as temperature measuring devices. In the form of metal wires, they are connected at both ends and often applied to diesel engines, kilns, and gas turbine exhausts. Sometimes, they will be used in thermostats and as flame sensors appliances that are powered by gas.

Chromel, made mostly of nickel with some chromium, is used with Alumel. Alumel is used in conjunction with Chromel. Like Chromel, Alumel mostly contains nickel in addition to chromium (3%), aluminum (2%), silicon (1%). Constantan gets paired with iron, copper, and Chromel. It has high electrical resistivity and contains copper and nickel. Iron has a great deal of magnetic properties and is heat and corrosion resistant.


EXTENSION GRADE
TYPE K THERMOCOUPLE
 
CHROMEL KPX - POSITIVE LEG
.094 diam X 12 foot
.1097 diam X 12 foot
.125 diam X 12 foot
.156 diam X 12 foot
ALUMEL KNX - NEGATIVE LEG
.094 diam X 12 foot
.1097 diam X 12 foot
.125 diam X 12 foot
.156 diam X 12 foot
 
TYPE J THERMOCOUPLE
IRON JPX - POSITIVE LEG
Available on request

CONCONSTANTAN JNX - NEGATIVE LEG
.094 diam X 12 foot
.1097 diam X 12 foot
.125 diam X 12 foot

EMF Calibration to meet ASTM E 230 (Standard Limitation)

 

For more information on these alloys, visit our Miscellaneous Grade Metal Alloys page or contact us for a quote.