nichrome resistance heating alloy

Alloy Nomenclature Cr20Ni80 Cr30Ni70 Cr15Ni60 Cr20Ni35 Cr20Ni30
Performance
Main Ni (Rest) Rest 55.0-61.0 34.0-37.0 30.0-34.0
Chemical Cr 20.0-23.0 28.0-31.0 15.0-18.0 18.0-21.0 18.0-21.0
composition Fe =1.0 =1.0 Rest Rest Rest
Max. continuous service temp. 1200 1250 1150 1100 1100
of element
Resistivity at 20 C 1.09 1.18 1.12 1 1.04
Density 8.4 8.1 8.2 7.9 7.9
Thermal conductivity 60.3 45.2 45.2 43.8 43.8
Coefficient of lines expansion 18 17 17 19 19
Melting point 1400 1380 1390 1390 1390
(approx.))
Elongation at >20 >20 >20 >20 >20
rupture
Micrographic austenite austenite austenite austenite austenite
structure
Magnetic nonmagnetic nonmagnetic Weak magnetic Weak magnetic Weak magnetic
properties

nichrome resistance heating alloy