This type of alloy wire has higher electrical resistance coefficient than other materials, better anti-corrosion and anti friction properties, this group of products are suitable for producing electric heating components and common electrical resistance components. Size range: 0.03mm-1.0mm Main characteristics of Nichrome electric heating wiresAlloy 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 20ºC (μΩ·m) | 1.09 | 1.18 | 1.12 | 1.0 | 1.04 | Density (g/cm3) | 8.40 | 8.10 | 8.20 | 7.90 | 7.90 | Thermal conductivity(KJ/m·h·ºC) | 60.3 | 45.2 | 45.2 | 43.8 | 43.8 | Coefficient of lines expansion(α×10-6/ºC) | 18.0 | 17.0 | 17.0 | 19.0 | 19.0 | Melting point (approx.)( ºC) | 1400 | 1380 | 1390 | 1390 | 1390 | Elongation at rupture (%) | >20 | >20 | >20 | >20 | >20 | Micrographic structure | austenite | austenite | austenite | austenite | austenite | Magnetic properties | nonmagnetic | nonmagnetic | Weak magnetic | Weak magnetic | Weak magnetic | |