Main characteristics of Nichrome electric heating wiresAlloy Nomenclature
Performance
| Cr20Ni80
| Cr30Ni70
| Cr15Ni60
| Cr20Ni35
| Cr20Ni30
|
Main
Chemical
composition
| Ni
| Rest
| Rest
| 55.0-61.0
| 34.0-37.0
| 30.0-34.0
|
Cr
| 20.0-23.0
| 28.0-31.0
| 15.0-18.0
| 18.0-21.0
| 18.0-21.0
|
Fe
| ≤1.0
| ≤1.0
| Rest
| Rest
| Rest
|
Max. continuous service temp. of element
| 1200
| 1250
| 1150
| 1100
| 1100
|
Resistivity at 20ºC (μΩ·m)
| 1.09
| 1.18
| 1.12
| 1.0
| 1.04
|
Density (g/cm3)
| 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)
| 1400
| 1380
| 1390
| 1390
| 1390
|
Elongation at rupture (%)
| >20
| >20
| >20
| >20
| >20
|
Micrographic structure
| austenite
| austenite
| austenite
| austenite
| austenite
|
Magnetic properties
| nonmagnetic
| nonmagnetic
| Weak magnetic
| Weak magnetic
| Weak magnetic
|
