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Nichrome resistance heating alloy

Nickel-chromium, nickel-chromium alloy with high and stable resistance, corrosion resistance, surface oxidation resistance is good, a better under high temperature and seismic strength, good ductility, good workability and weldability, is widely used in industrial electric furnace, metallurgy, household appliances, machinery manufacturing, heating element and resistor varistor other material.

Other Name: Chromel A, Nikrothal 80, N8, Nichrome V, Tophet A, Resistohm 80,Cronix 80, Alloy A, MWS-650, Stablohm 650; Chromel C, Nikrothal 60, N6, Tophet C,Resistohm 60, Cronifer II, Nichrome Alloy C, MWS-675, Stablohm 675;

     

Main characteristics of Nichrome 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(ºC) 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