Nilo 36* Specification
*Trade name of Special Metals Group of Companies
- W.NR 1.3912
- UNS K93600
- UNS K93601
- AWS 090
Applicable Standards:
- -
A Nickel-Iron, low expansion alloy containing 36% Nickel. It maintains near constant dimensions over the range of normal atmospheric temperatures and has a low coefficient of expansion from cryogenic temperatures to about 500oC (930oF). Nilo 36 also retains good strength and toughness at cryogenic temperatures.
Applications include:
- Standards of length (measurement reference)
- Thermostat rods
- Laser components
- Tanks and piping for the storage and transportation of liquefied gasses
| Approximate Chemical Composition | |
| Ni | 35 - 38% |
| Fe | BAL |
| Properties | ||
| DENSITY | 8.11 g/cm3 | 0.293 lb/in3 |
| MELTING POINT | 1430oC | 2610oF |
| INFLECTION POINT | 220°C | 430°F |
| THERMAL CONDUCTIVITY | 10.0 W/m•°C | 69.3 btu•in/ft2•h°F |
| COEFFICIENT OF EXPANSION | 1.5 µm/m °C (20 - 100°C) 2.6 µm/m °C |
0.83 x 10-6 in/in
°F (70 - 212°F) 1.4 x 10-6 in/in
°F |
| HEAT TREATMENT (AFTER FORMING) | |
| The Nilo alloys are usually used in the annealed condition (residual cold work distorts the coefficients of thermal expansion) | |
| Anneal at 850 - 1000°C (1560 - 1830°F) | |
| For highest dimensional stability, heat treat as follows: | Anneal at 830°C (1525°F) for 30 minutes and water quench, re-heat to 300°C (570°F) for 1 hour and water quench. Finally re-heat to 100°C (212°F) for 48 hours and air cool. |
| CONDITION | APPROX TENSILE STRENGTH | APPROX SERVICE TEMPERATURE | ||
| Annealed | 450 - 550 N/mm2 | 65 - 80 ksi | up to 500oC | up to 930oF |
| Hard Drawn | 700 - 900 N/mm2 | 102 - 131 ksi | up to 500oC | up to 930oF |
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