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Nilo® 48
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Nilo® 48

Available in any of the 'profile options'

A Nickel-Iron, controlled expansion alloy containing 48% Nickel. Its coefficient of thermal expansion was designed to match that of soft lead and soda-lime glasses. This alloy also has a high inflection point.

Chemical Composition Specifications Designations Key Features Typical 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
Coefficient of thermal expansion designed to match that of soft lead and soda-lime glasses.
High inflection point.
Industrial thermostats that operate at temperatures up to 450°C (840°F).
Glass to metal seals
Density 8.2 g/cm³ 0.296 lb/in³
Melting Point 1450°C 2640°F
Inflection Point 460°C 860°F
Thermal Conductivity 16.7 W/m•°C 116 btu•in/ft2•h°F
Coefficient of Expansion 8.5 µm/m °C (20 – 100°C)
8.3 – 9.3 µm/m °C (20 – 300°C)
4.7 x 10-6 in/in °F (70 – 212°F)
4.6 – 5.2 x 10-6 in/in °F (70 – 572°F)
Heat Treatment of Finished Parts
The Nilo alloys are usually supplied and used in the annealed condition (residual cold work distorts the coefficients of thermal expansion).
Annealing times may vary due to section thickness.
Type Temperature Time (Hr) Cooling
°C °F
Anneal 850 – 1000 1560 – 1830 0.5 Air or water
Properties
Condition Approx. tensile strength Approx. operating temperature
N/mm² ksi °C °F
Annealed 450 – 550 65 – 80 up to +450 up to +840
Hard Drawn 700 – 900 102 – 131 up to +450 up to +840

The above tensile strength ranges are typical. If you require different please ask.

*Trade name of Special Metals Group of Companies

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