NILO® Alloy 48

1.3922/26/27

UNS K94800

A nickel-iron controlled-expansion alloy containing 48% nickel. Its coefficient of thermal expansion is designed to match that of soft lead and soda-lime glasses. The alloy also has a high inflection point. Used for glass-to-metal seals in radio valves and incandescent electric light bulbs and for industrial thermostats that operate at temperatures up to 840°F (450°C).

Limiting
Fe   Balance  
Ni¹   48.00 %
Co max. 1.00 %
Mn max. 0.80 %
Si max. 0.30 %
Cr max. 0.25 %
Al max. 0.10 %
C max. 0.05 %
S max. 0.035 %
P max. 0.025 %

¹ Nominal value; adjusted to meet expansion requirements.

Density
g/cm³   8.20
lb/in³   0.296