Nickel Chrome Heating Wire - NiCr70 30

Our 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.

Applications include heating elements in both domestic and industrial appliances and in control resistors.

Purposes: 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.

Alloy Nomenclature/Performance NiCr8.20 NiCr70 30 NiCr60 15 NiCr35 20 NiCr30 20
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 (μ Ω · m) 1.09 1.18 1.12 1 1.04
Density (g/cm 3 ) 8.4 8.1 8.2 7.9 7.9
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 17 17 19 19
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 nonmagnetic Weak magnetic Weak magnetic