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NiCr alloy wires
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The material NiCr8020 is applied in the form of strips, sheets, tubes and wires for furnace construction components and heating conductors.
It is a nickel-chromium heating conductor alloy for operating temperatures of up to 1150 °C and often contains additives of rare earths for a higher resistance to oxidation, especially with frequent switching operations or broad temperature variations.
Description
The material NiCr8020 is applied in the form of strips, sheets, tubes and wires for furnace construction components and heating conductors.
It is a nickel-chromium heating conductor alloy for operating temperatures of up to 1150 °C and often contains additives of rare earths for a higher resistance to oxidation, especially with frequent switching operations or broad temperature variations.
The resistance to atmospheric corrosion at 20 °C is high up to the upper operating temperature the resistance to air and other oxygen-containing gases as well as to nitrogen-containing low-oxygen gases is high as well, yet it is low to oxidizing as well as reducing gases containing sulphur.
The resistance to carbonizing is high. Application for industrial electric furnaces, enamelling furnaces, household appliances, night-current storage space-heaters.
Characteristics
Stable performance; Anti-oxidation; Corrosion resistance;
High temperature stability; Excellent coilforming ability;
Uniform and beautiful surface condition without spots.
Usage
Resistance heating elements;Material in metallurgy,
Household appliances;Mechanical manufacturing and other industries.
Chemical Composition and Propertes
| Propertes/Grade | NiCr 80/20 | NiCr 70/30 | NiCr 60/15 | |
| Main Chemical Composition(%) | Ni | Bal. | Bal. | 55.0-61.0 |
| Cr | 20.0-23.0 | 28.0-31.0 | 15.0-18.0 | |
| Fe | ≤ 1.0 | ≤ 1.0 | Bal. | |
| Max Working Temperature(ºC) | 1200 | 1250 | 1150 | |
| Resistivity at 20ºC(μ Ω · m) | 1.09 | 1.18 | 1.12 | |
| Density(g/cm3) | 8.4 | 8.1 | 8.2 | |
| Thermal Conductivity(KJ/m· h· ºC) | 60.3 | 45.2 | 45.2 | |
| Coefficient of Thermal Expansion(α × 10-6/ºC) | 18 | 17 | 17 | |
| Melting Point(ºC) | 1400 | 1380 | 1390 | |
| Elongation(%) | >20 | >20 | >20 | |
| Micrographic Structure | austenite | austenite | austenite | |
| Magnetic Property | nonmagnetic | nonmagnetic | nonmagnetic | |
Typical Mechanical properties(1.0mm)
Elongation: 30%
Yield Strength: 420Mpa
Tensile Strength: 810Mpa
SPECIFICATIONS
| Chemical Composition | Nickel 80%, Chrome 20% |
| Condition | Bright/Acid white/Oxidied Color |
| Diameter | 0.018mm~1.6mm in spool, 1.5mm-8mm packing in coil, 8~60mm in rod |
| Nichrome Round Wire | Diameter 0.018mm~10mm |
| Nichrome Ribbon | Width 5~0.5mm, thickness 0.01-2mm |
| Nichrome Strip | Width 450mm~1mm, thickness 0.001m~7mm |
| Diameter | 1.5mm-8mm packing in coil, 8~60mm in rod |
| Grade | Ni80Cr20, Ni70/30, Ni60Cr15, Ni60Cr23, Ni35Cr20Fe,
Ni30Cr20 Ni80, Ni70,Ni60, Ni40 |
