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Nilo 42

Nilo 42*

Available in any of the 'profile options'

A Nickel-Iron, low expansion alloy containing 42% Nickel. It has a low and nominally constant coefficient of thermal expansion from room temperature to about 300oC (570oF).

Chemical Composition Specifications Designations Key Features Typical Applications
Element Min % Max %
Ni 41.00 nominal
Fe bal
Mn - 0.80
Si - 0.30
C - 0.05
Cr - 0.25
P - 0.03
S - 0.03
Al - 0.10
ASTM F30 W.NR 1.3917
UNS K94100
AWS 091
Low and nominally constant coefficient of thermal expansion from room temperature to about 300°C (570°F). Semiconductor lead frames
Thermostat rods
Various glass to metal seals
Density 8.11 g/cm³ 0.293 lb/in³
Melting Point 1435°C 2615°F
Inflection Point 370°C 700°F
Thermal Conductivity 10.5 W/m•°C 72.8 btu•in/ft2•h°F
Coefficient of Expansion 5.3 µm/m °C (20 - 100°C)
4.5 - 6.5 µm/m °C (20 - 300°C)
2.9 x 10-6 in/in °F (70 - 212°F)
2.5 - 3.6 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 +300 up to +570
Hard Drawn 700 - 900 102 - 131 up to +300 up to +570

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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