Cromel®KP

General description 

Cromel®KP – nickel based alloy (89-91 %), alloyed with chrome and cobalt. Iron, manganese, silicon, copper etc. are contained in quality of impurities, which total amount shouldn't exceed 1,4%. Nickel provides alloy with heat and corrosion resistance, especially in agressive environment.

Cromel®KP is used at production of thermocouples, compensation wires, rheostats, heating devices.

Due to ability to keep stable thermo-emf at temperature up to 1000oС, Cromel®KP is used as a positive thermoelectrode of chromel-alumel thermocouple.

Classification

DIN

2.4870

Abbr.

KP/EP(X)

Chemical composition, %

Ni+Co

Fe

C

Mn

Si

P

S

87.4-90.4

≤0.3

≤0.2

≤0.3

≤0.4

≤0.003

≤0.010

Co

Co

Cu

As

Pb

Mg

Sb

9.0-10.0

0.6-1.2

≤0.25

≤0.002

≤0.002

≤0.05

≤0.002

Mechanical properties at 20°С

 

soft alloy

hard alloy

Tensile strength, MPa

600-700

1000-1100

Elongation, %

15-20

3.5

Hardness, HB

150-200

300

MAIN DELIVERY CONDITIONS

Cromel®KP alloy is suplied in shape of strip or wire. Cromel®KP wire is widely used at production of thermocouples and compensation wires.

Wire

Cromel®KP is supplied with diameters from 0,0254 to 8,0 mm. Wire Cromel®KP with sizes from 0,0254 mm to 0,51 mm can be supplied with insulated coating or without it.

Strip

Standard sizes of Cromel®KP strip are next: thickness from 0,10 to 3,0 mm, width from 4 to 195 mm.

APPLICATION

In view of the considerable content of nickel in alloy Cromel®KP advantage is mostly defined by physical properties of metal. Foremost, these are thermal stability and corrosion resistance, especially in aggressive environment.

Cromel®KP possesses very successful combination of heat resistance and thermoelectric properties. Alloy has rather big TCLE. At the same time thermo-emf change has almost rectilinear character in the wide range of temperatures.

Cromel®KP is widely applied in pyrometry at production of compensation wires and also in the form of positive thermoelectrode at production of thermocouples. Thermocouple is a thermoelectric element which is applied to measure temperature of various objects, and also in automation systems. Thermocouple consists of two thermoelectrodes: positive and negative. The most popular  thermocouples are chromel-alumel thermocouples, because of their universalism and availability.

Related products
Alumel®KN