Cr30Ni70

Product Description Cr30Ni70 is an ideal material, it has good ductility,workability and weldability under high temperature and seismic strength. Nickel-chromium alloy with high and stable resistance, corrosion resistance, surface oxidation resistance, excellent coil-forming ability. Size dimension range: Wire: 0.01-10mm Ribbons: 0.05*0.2-2.0*6.0mm Strip: 0.05*5.0-5.0*250mm NiCr series: Cr20Ni80, Cr30Ni70, Cr15Ni60, Cr20Ni35, Cr20Ni30    
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
Meltiing point ℃ 1400 1380 1390 1390 1390
Resistivity at 20ºC (μΩ·m) 1.09±0.05 1.18±0.05 1.12±0.05 1.00±0.05 1.04±0.05
Density(g/cm3) 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