Changzhou Victory Technology Co., Ltd
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Cr30Ni70 Alloy Wire: Superior Resistance and Stability in Extreme Thermal Environments
NiCr Series
Cr30Ni70 alloy wire is a high-performance nickel-chromium alloy resistance heating material, mainly composed of 70% nickel and 30% chromium, with excellent high temperature stability and corrosion resistance. Its melting point is about 1370-1410℃, the maximum continuous working temperature can reach 1250℃, and the density is 8.1-8.2 g/cm³. The resistivity of this alloy wire is about 1.08-1.12 μΩ·m at 20℃, the tensile strength is 650-900 MPa, and the elongation is greater than 25%, showing good mechanical properties.
This alloy wire is widely used in industrial furnaces, electric heating elements, vacuum furnaces, high-temperature heat treatment equipment and other fields, especially suitable for manufacturing high-power and high-temperature heating elements. Its excellent performance makes it an ideal material for high-end applications such as aerospace, metallurgy, energy and laboratory equipment.
| 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 |
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What material is Cr30Ni70 wire?
Cr30Ni70 wire is a nickel-chromium alloy heating wire containing 70% nickel and 30% chromium.
What is its main use?
It is mainly used for high-temperature electric heating elements such as electric furnaces, heat treatment equipment, etc.
What are its advantages?
It has high-temperature oxidation resistance, high resistivity and good mechanical properties.
What is its maximum operating temperature?
The maximum operating temperature can reach 1200℃.