Nickel-chromium, nickel-chromium alloy with high and stable resistance, corrosion resistance, surface oxidation resistance is good, a better under high temperature and seismic strength, good ductility, good workability and weldability, is widely used in industrial electric furnace, metallurgy, household appliances, machinery manufacturing, heating element and resistor varistor other material.
Other Name: Chromel A, Nikrothal 80, N8, Nichrome V, Tophet A, Resistohm 80,Cronix 80, Alloy A, MWS-650, Stablohm 650; Chromel C, Nikrothal 60, N6, Tophet C,Resistohm 60, Cronifer II, Nichrome Alloy C, MWS-675, Stablohm 675;
Main characteristics of Nichrome electric heating alloys
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Alloy Nomenclature Performance
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Cr20Ni80
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Cr30Ni70
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Cr15Ni60
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Cr20Ni35
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Cr20Ni30
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|
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Main Chemical composition
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Ni
|
Rest
|
Rest
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55.0-61.0
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34.0-37.0
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30.0-34.0
|
|
Cr
|
20.0-23.0
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28.0-31.0
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15.0-18.0
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18.0-21.0
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18.0-21.0
|
|
|
Fe
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≤1.0
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≤1.0
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Rest
|
Rest
|
Rest
|
|
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Max. continuous service temp. of element(ºC)
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1200
|
1250
|
1150
|
1100
|
1100
|
|
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Resistivity at 20ºC (μΩ·m)
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1.09
|
1.18
|
1.12
|
1.0
|
1.04
|
|
|
Density(g/cm3)
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8.40
|
8.10
|
8.20
|
7.90
|
7.90
|
|
|
Thermal conductivity (KJ/m·h·ºC)
|
60.3
|
45.2
|
45.2
|
43.8
|
43.8
|
|
|
Coefficient of lines expansion(α×10-6/ºC)
|
18.0
|
17.0
|
17.0
|
19.0
|
19.0
|
|
|
Melting point approx.( ºC)
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1400
|
1380
|
1390
|
1390
|
1390
|
|
|
Elongation at rupture(%)
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>20
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>20
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>20
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>20
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>20
|
|
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Micrographic structure
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austenite
|
austenite
|
austenite
|
austenite
|
austenite
|
|
|
Magnetic properties
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nonmagnetic
|
nonmagnetic
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Weak magnetic
|
Weak magnetic
|
Weak magnetic
|
|