Shanghai Tankii Alloy Material Co.,Ltd
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Nicr80 / 20 Nichrome Wire Magnetic Alloy For Resistance Wire
Nichrome, a non magnetic alloy of nickel and chromium, is commonly used to make resistance wire.
Because it has a high resistivity and resistance to oxidation at high temperatures. When used as a heating element, resistance wire is usually wound into coils.
Nichrome wire is commonly used in ceramics as an internal support structure to help some elements of clay sculptures hold their shape while they are still soft. Nichrome wire is used because of its ability to withstand the high temperatures that occur when a clay work is fired in a kiln.
Ni80Cr20
Chemical Content, %
|
C |
P |
S |
Mn |
Si |
Cr |
Ni |
Al |
Fe |
Other |
|
Max |
|||||||||
|
0.08 |
0.02 |
0.015 |
0.60 |
0.75~1.60 |
20.0~23.0 |
Bal. |
Max 0.50 |
Max 1.0 |
- |
Mechanical Properties
|
Max Continuous Service: Resisivity( 20℃)/Ω·m:
Density: Thermal Conductivity: Coefficient of Thermal Expansion: Melting Point: Elongation: Micrographic Structure: Magnetic Property: |
1200℃ 1.09 +/-0.05 (Dia: <0.5mm) 1.13+/-0.05 (Dia: 0.50-3.00 mm) 1.14+/-0.05 (Dia: >3.0mm)
8.4 g/cm3 60.3 KJ/m·h·℃ 18.0 α×10-6/℃ 1400 ℃ Min 20% Austenite nonmagnetic |
Main Property of nichrome heating wire
| Alloy 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(ºC) | 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 |
|