Cr20Ni80 Resistance Heating Wire

The Cr20Ni80 resistance heating wire is the most popular heating wire used in the heating elements. It has high resistivity and resistance to oxidation at high temperatures. When used as a heating element, resistance wire is usually wound into coils.
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Cr20Ni80 Resistance Heating Wire


The Cr20Ni80 resistance heating wire is the most popular heating wire used in the heating elements. It has high resistivity and resistance to oxidation at high temperatures. When used as a heating element, resistance wire is usually wound into coils. The high nickel content combined with the high chromium content let the scaling temperature can reach to 1250ºC. The Nickel Chrome wire can be pooled by high speed automatic cooling machine, and can be made as wire and ribbon(strip).


Chemical characteristics of Cr-Ni resistance heating wire:

Type

Cr20Ni80

Cr15Ni60

Cr30Ni70

Cr20Ni35

Cr20Ni30

Main chemical composition

Ni

Rest

55.0~61.0

Rest

34.0~37.0

30.0~34.0

Cr

20.0~23.0

15.0~18.0

28.0~31.0

18.0~21.0

18.0~21.0

Fe

≤1

Rest

≤1

Rest

Rest

Maximal Temperature(℃)

1200

1150

1250

1100

1100

Resistance Temperature correction coefficient.(CT)

1.09±0.05

1.11±0.05

1.18±0.05

1.04±0.05

1.06±0.05

Melting point (℃)

1400

1390

1380

1390

1390

Resistivityρ20℃(10-6Ω.m)

800℃

1.008

1.078

1.028

1.188

1.173

1000℃

1.014

1.095

1.033

1.219

1.201

1200℃

1.025


1.043

Fast life value

Tem.(℃)

1175

1100

1200

1050

1050

hour(h)

≥110

≥100

≥110

≥100

≥100

Specific gravity(g/cm3)

8.40

8.2

8.1

7.90

7.90

Elongation(%)

≥25

≥25

≥20

≥20

≥20

Thermal(kj/m.h.℃)

60.3

45.2

45.2

43.8

43.8

Specific heat(20℃)j/g.℃

0.440

0.494

0.461

0.500

0.500

Extend strength(20~1000℃)α*10-6℃

18.0

17.0

17.1

19.0

19.0

Tensile strength(kg/mm2)

>85

>85

>85

>85

>85

Repeatedly bending(F/R)

>12

>12

>12

>12

>12

Microstructure

Austenitic

Austenitic

Austenitic

Austenitic

Austenitic


The Application of the Chrome nickel resistance wire:

Chrome nickel resistance wire is widely used for making electric heating elements in home appliances and industrial furnaces and equipment, various electrical resistors and locomotive braking resistor, infrared equipment, liquefied gas infrared heat-resisting net, different kinds of igniting and radiating electrodes and voltage-regulating resistors for motors and so on.


Order Guide:

1- Wire material

2- Wire Diameter

3- Order quantity


Application-Spare Parts

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