Cr30Ni70 Nichrome Wire Exceptional Thermal Stability for Long Lasting Industrial Heating
Brand Name:Victory
Certification:CE
Model Number:Cr30Ni70
Minimum Order Quantity:5
Delivery Time:5-21 days
Payment Terms:L/C, T/T, Western Union, MoneyGram
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Changzhou Jiangsu China
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Cr30Ni70 Nichrome Wire: Exceptional Thermal Stability for Long-Lasting Industrial Heating
NiCr Series
Cr30Ni70 nickel-chromium alloy wire is a high-performance
resistance heating material with excellent high-temperature
stability and oxidation resistance, and is widely used in the field
of industrial heating. Its chemical composition mainly includes 70%
nickel and 30% chromium, with a melting point of about 1380℃, a
maximum operating temperature of up to 1250℃, a resistivity of
1.18±0.05μΩ·m (at 20℃), a tensile strength of 810 MPa, and an
elongation of 30%, showing good mechanical properties.
The high-temperature stability of Cr30Ni70 alloy wire makes it not
easy to deform during long-term use and has a long service life. In
addition, the alloy wire also has good weldability and forming
ability, suitable for manufacturing heating elements of various
shapes.
Cr30Ni70 alloy wire is widely used in industrial furnaces, electric
heating elements, heat treatment equipment, and other fields that
require high-temperature stability, especially in reducing
atmospheres and high-temperature oxidizing environments. Its
excellent performance makes it an indispensable material in
industries such as aerospace, energy, and metallurgy.
| Performance material | Cr10Ni90 | Cr20Ni80 | Cr30Ni70 | Cr15Ni60 | Cr20Ni35 | Cr20Ni30 | |
| Composition | 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 | ||
| Maximum temperature℃ | 1300 | 1200 | 1250 | 1150 | 1100 | 1100 | |
| Meltiing point ℃ | 1400 | 1400 | 1380 | 1390 | 1390 | 1390 | |
| Density g/cm3 | 8.7 | 8.4 | 8.1 | 8.2 | 7.9 | 7.9 | |
| Resistivity at 20℃((μΩ·m) | 1.09±0.05 | 1.18±0.05 | 1.12±0.05 | 1.00±0.05 | 1.04±0.05 | ||
| Elongation at rupture | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | |
| Specific heat | 0.44 | 0.461 | 0.494 | 0.5 | 0.5 | ||
| J/g.℃ | |||||||
| Thermal conductivity | 60.3 | 45.2 | 45.2 | 43.8 | 43.8 | ||
| KJ/m.h℃ | |||||||
| Coefficient of lines expansion | 18 | 17 | 17 | 19 | 19 | ||
| a×10-6/ | |||||||
| (20~1000℃) | |||||||
| Micrographic structure | Austenite | Austenite | Austenite | Austenite | Austenite | ||
| Magnetic properties | Non-magnetic | Non-magnetic | Non-magnetic | Weak magnetic | Weak magnetic | ||
| Micrographic structure | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | |
| Magnetic properties | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic | 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 |
- Feature
High temperature performance:
It has excellent high temperature strength and oxidation
resistance, and can work stably at 1000°C or even higher.
The chromium oxide protective film formed on the alloy surface can
effectively prevent further oxidation.
Corrosion resistance:
It has strong corrosion resistance to chemical media such as acids
and alkalis, especially in high temperature corrosion environments.
Thermal stability:
It has a low thermal expansion coefficient (about 14×10⁻⁶/K) and
good dimensional stability when the temperature changes.
It has a moderate specific heat capacity (about 0.4 J/g·K), which
is suitable for applications that respond quickly to temperature
changes.
Resistance performance:
The room temperature resistivity is about 1.1-1.3×10⁻⁶Ω·m, and the
resistivity changes little at high temperatures.
Processing performance:
Although the hardness is high, it can be finely processed through
appropriate heat treatment and processing technology.
- Q&A
Which industries is Cr30Ni70 wire suitable for?
Cr30Ni70 wire is widely used in electric heating, chemical
industry, metallurgy, aerospace and other industries, especially
for high-temperature furnaces, electric heating elements, chemical
reactors and aerospace high-temperature parts.
What are its welding methods?
Cr30Ni70 wire welding methods include argon arc welding (TIG),
metal arc welding (MIG) and laser welding, etc. The specific
selection depends on the thickness of the workpiece and the welding
requirements.
How is the oxidation resistance of Cr30Ni70 wire?
Cr30Ni70 wire has excellent oxidation resistance and can form a
dense chromium oxide protective film at high temperature to prevent
further oxidation. At 1000℃, its oxidation rate is extremely low,
which is suitable for long-term high-temperature use.
Cr30Ni70 Nichrome Wire Exceptional Thermal Stability for Long Lasting Industrial Heating
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