Nichrome wire is a non-magnetic alloy that is primarily composed of
nickel, chromium, and iron. It is a highly useful material due to
its unique properties, such as high resistivity and good oxidation
resistance. The high resistivity of nichrome wire allows it to
resist the flow of electrical current, which makes it an excellent
choice for use in electrical devices that require thermal action,
such as heat guns and industrial hair dryers.
Nichrome wire also has excellent ductility after use and
weldability, which means that it can be easily shaped and formed
into various shapes and sizes, and can be easily welded together to
form larger structures. This makes it an ideal choice for
manufacturing heating elements for laboratory and industrial
electric furnaces, water heating systems, high-value electrical
resistors, heating cords, and cables.
Furthermore, nichrome wire has good oxidation resistance, which
allows it to withstand high temperatures and prevents it from
corroding over time. This makes it an ideal choice for use in
applications that require high-temperature resistance.
In conclusion, nichrome wire is a versatile and reliable material
that is essential in many industries. Its unique combination of
properties makes it an ideal choice for applications that require
high-temperature resistance, electrical resistance, and ductility.
Size dimension range:
Wire: 0.01-10mm
Ribbons: 0.05*0.2-2.0*6.0mm
Strip: 0.05*5.0-5.0*250mm
NiCr series: Cr20Ni80, Cr30Ni70, Cr15Ni60, Cr20Ni35, Cr20Ni30
| Performance material | Cr10Ni90 | Cr20Ni80 | Cr30Ni70 | Cr15Ni60 | Cr20Ni35 | Cr20Ni30 |
| Composición | Ni | 90 | Rest | Rest | 55.0～61.0 | 34.0～37.0 | 30.0～34.0 |
| Cr | 10 | 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 |
| Temperatura máxima℃ | 1300 | 1200 | 1250 | 1150 | 1100 | 1100 |
| Punto de fusion ℃ | 1400 | 1400 | 1380 | 1390 | 1390 | 1390 |
| Densidad g/cm3 | 8.7 | 8.4 | 8.1 | 8.2 | 7.9 | 7.9 |
| Resistividad μΩ·m,20℃ | 0.76±0.05 | 1.09±0.05 | 1.18±0.05 | 1.12±0.05 | 1.00±0.05 | 1.04±0.05 |
| Alargamiento a la ruptura | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 |
| Calor especifico J/g.℃ | － | 0.44 | 0.461 | 0.494 | 0.5 | 0.5 |
| Conductividad térmica KJ/m.h℃ | － | 60.3 | 45.2 | 45.2 | 43.8 | 43.8 |
| Coeficiente de expansión de líneas a×10-6/(20～1000℃) | － | 18 | 17 | 17 | 19 | 19 |
| Estructura micrográfica | － | Austenite | Austenite | Austenite | Austenite | Austenite |
| Propiedades magnéticas | － | Nonmagnetic | Nonmagnetic | Nonmagnetic | Weak magnetic | Weak magnetic |
| Form | Specification |
| Wire | Diameter=0.025mm~8mm |
| Flat wire | Width=0.40~6.0mm | Thick=0.03~0.50mm |
| Strip | width=8~250mm | Thick=0.05~3.0mm |
| Bar | Diameter=8~100mm | Long=50~1000 |
NiCr 80/20 is suitable for heating elements used for temperatures
upto 1200°C. This is used for electrical cooking equipment,
precison resistors. Oxidized wires of these alloys display better
insulation properties.
NiCr 70/30 is suitable for heating elements used for temperatures
upto 1230°C for industrial furnaces which have alternating
oxidizing, or reducing atmosphere. This alloy has excellent
corrosion resistance and long life in air and controlled
atmospheres.
NiCr 60/15 is suitable for heating elements used for temperatures
upto 1150°C. This is used for electrically heated equipment, high
resistance and potientiometer resistors.
NiCr 30/20 is suitable for heating elements used for temperatures
upto 1050°C. Inspite of relatively high Fe content, these alloys
are resistant to oxidation and chemical corrosion. They are used
for making heating elements of cooking equipment, heating cords and
cables.
