Invar (NILO) 48

Nilo (Invar) is a nickel-iron controlled expansion alloy with 48% Nickel. Due to its very low expansion coefficient, it is used in many electronic applications, especially in glass and ceramic sealing applications.

Composition Standard Specification Key features Applications
Element Min % Max %
Ni 48.00 nominal
Fe bal
Mn 0.80
Si 0.30
C 0.05
Cr 0.25
P 0.025
S 0.03
Al 0.10
ASTM F30 W.NR 1.3922
W.NR 1.3926
W.NR 1.3927
UNS K94800
AWS 092
Low expansion coefficient
Industrial thermostats operating at temperatures up to 450 ° C (840 ° F). Glass – metal sealing
Density 8.2 g/cm³ 0.296 lb/in³
Melting point 1450°C 2640°F