Nickel Chrome Heating Wire
Product Description
Resistance wire(heating wire) used at operating temperatures up to 1200. Its chemical composition gives
good oxidation resistance especially under conditions of frequent switching or wide temperature fluctuations.
good oxidation resistance especially under conditions of frequent switching or wide temperature fluctuations.
Applications include heating elements in both domestic and industrial appliances and in control resistors.
Ni-Cr materials are widely used in industrial electric furnaces, household appliances and far-infrared devices
because of their high temperature strength and strong plasticity.
Ni-Cr materials are widely used in industrial electric furnaces, household appliances and far-infrared devices
because of their high temperature strength and strong plasticity.
| Main property of NiCr electric heating alloy | ||||||||
| property | type | Cr20Ni80 | Cr30Ni70 | Cr15Ni60 | Cr20Ni35 | Cr20Ni30 | ||
| Main chemical composition% | Ni | Rest | Rest | 55~61 | 34~37 | 30~34 | ||
| Cr | 20~23 | 28~31 | 15~18 | 18~21 | 18~21 | |||
| Fe | Rest | Rest | Rest | |||||
| Max continuous Temp.of element(℃) | 1200 | 1200 | 1150 | 1100 | 1100 | |||
| resistivity(mm²/m) | 1.09 | 1.09 | 1.12 | 1 | 1.04 | |||
| Density((g/cm³)) | 8.4 | 8.4 | 8.2 | 7.9 | 7.9 | |||
| Thermal conductivity(KJ/M.h℃) | 60.3 | 60.3 | 45.2 | 43.8 | 43.8 | |||
| Coefficient of liner expansion(a*10-5/℃) | 18 | 18 | 17 | 19 | 19 | |||
| Melting point (℃) | 1400 | 1400 | 1390 | 1390 | 1390 | |||
| Elongation(%) | 720 | 720 | 720 | 720 | 720 | |||
| Micrographic structure | Austenitic | Austenitic | Austenitic | Austenitic | Austenitic | |||
| Magnetic property | NONE | NONE | NONE | NONE | NONE | |||
Technical Data Sheet
Main characteristics of Ni-Cr electric heating alloys
| Alloy Nomenclature/Performance | Cr20Ni80 | Cr30Ni70 | Cr15Ni60 | Cr20Ni35 | Cr20Ni30 | |
| Main Chemical composition | Ni | Rest | Rest | 55.0-61.0 | 34.0-37.0 | 30.0-34.0 |
| Cr | 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 | |
| Max. continuous service temp. of element | 1200 | 1250 | 1150 | 1100 | 1100 | |
| Resistivity at 20°C(μΩ·m) | 1.09 | 1.18 | 1.12 | 1 | 1.04 | |
| Density (g/cm3) | 8.4 | 8.1 | 8.2 | 7.9 | 7.9 | |
| Thermal conductivity(KJ/m·h·°C) | 60.3 | 45.2 | 45.2 | 43.8 | 43.8 | |
| Coefficient of lines expansion(α×10-6/°C) | 18 | 17 | 17 | 19 | 19 | |
| Melting point (approx.)( °C) | 1400 | 1380 | 1390 | 1390 | 1390 | |
| Elongation at rupture (%) | >20 | >20 | >20 | >20 | >20 | |
| Micrographic structure | austenite | austenite | austenite | austenite | austenite | |
| Magnetic properties | nonmagnetic | nonmagnetic | nonmagnetic | Weak magnetic | Weak magnetic | |