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Resistance Heating Nickel Alloy Cr20ni80 Nichrome Resistance Strip Ni80cr20 Heating Strip From Factory
NiCr80/20
The material NiCr8020 with the material number 2.4869 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.
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 |
Type | Cr20Ni80 | Cr15Ni60 | Cr30Ni70 | Cr20Ni35 | Cr20Ni30 | |
Main chemical composition | Ni | Rest | 55.0~61.0 | Rest | 34.0~37.0 | 30.0~34.0 |
Cr | 20.0~23.0 | 15.0~18.0 | 28.0~31.0 | 18.0~21.0 | 18.0~21.0 | |
Fe | ≤1 | Rest | ≤1 | Rest | Rest | |
Maximal Temperature(℃) | 1200 | 1150 | 1250 | 1100 | 1100 | |
Resistance Temperature correction coefficient.(CT) | 1.09±0.05 | 1.11±0.05 | 1.18±0.05 | 1.04±0.05 | 1.06±0.05 | |
Melting point (℃) | 1400 | 1390 | 1380 | 1390 | 1390 | |
Resistivityρ20℃(10-6Ω.m) | 800℃ | 1.008 | 1.078 | 1.028 | 1.188 | 1.173 |
1000℃ | 1.014 | 1.095 | 1.033 | 1.219 | 1.201 | |
1200℃ | 1.025 | 1.043 | ||||
Fast life value | Tem.(℃) | 1175 | 1100 | 1200 | 1050 | 1050 |
hour(h) | ≥110 | ≥100 | ≥110 | ≥100 | ≥100 | |
Specific gravity(g/cm3) | 8.40 | 8.2 | 8.1 | 7.90 | 7.90 | |
Elongation(%) | ≥25 | ≥25 | ≥20 | ≥20 | ≥20 | |
Thermal(kj/m.h.℃) | 60.3 | 45.2 | 45.2 | 43.8 | 43.8 | |
Specific heat(20℃)j/g.℃ | 0.440 | 0.494 | 0.461 | 0.500 | 0.500 | |
Extend strength(20~1000℃)α*10-6℃ | 18.0 | 17.0 | 17.1 | 19.0 | 19.0 | |
Tensile strength(kg/mm2) | >85 | >85 | >85 | >85 | >85 | |
Repeatedly bending(F/R) | >12 | >12 | >12 | >12 | >12 | |
Microstructure | Austenitic | Austenitic | Austenitic | Austenitic | Austenitic |
Our Nichrome alloy are in the form of wire, ribbon, strip, coil.
Delivery conditions are: