Nilo 48* Specification
*Trade name of Special Metals Group of Companies
- W.NR 1.3922
- W.NR 1.3926
- W.NR 1.3927
- UNS K94800
- AWS 092
Applicable Standards:
- ASTM F30
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.
Applications include:
- Industrial thermostats that operate at temperatures up to 450oC (840oF)
- Glass to metal seals
| Approximate Chemical Composition | |
| Ni | 48% |
| Fe | BAL |
| Properties | ||
| DENSITY | 8.2 g/cm3 | 0.296 lb/in3 |
| MELTING POINT | 1450oC | 2640oF |
| 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 |
4.7 x 10-6 in/in
°F (70 - 212°F) 4.6-5.2 x 10-6 in/in
°F |
| HEAT TREATMENT (AFTER FORMING) |
|
The Nilo alloys are usually used in the
annealed condition Anneal at 850 - 1000°C (1560 - 1830°F) |
| CONDITION | APPROX TENSILE STRENGTH | APPROX SERVICE TEMPERATURE | ||
| Annealed | 450 - 550 N/mm2 | 65 - 80 ksi | up to 450oC | up to 840oF |
| Hard Drawn | 700 - 900 N/mm2 | 102 - 131 ksi | up to 450oC | up to 840oF |
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