Alloy Wire International
Datasheet: Nilo® 36
Nilo® 36
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 500°C (930°F).
Nilo 36 also retains good strength and toughness at cryogenic temperatures. This makes it useful for applications such as cryogenic engineering and laser components.
Nilo® 36 is also known as Invar / Invar 36, Supra 36, and Pernifer 36.
Available in all profile options
Key Features
Nilo® 36 offers the following key features:
Low expansion alloy. Maintains near constant dimensions over the range of normal atmospheric temperatures.
Low coefficient of expansion from cryogenic temperatures to about +500°C (+930°F). Retains strength and toughness at cryogenic temperatures.
Typical Applications
Nilo® 36 is known to be suitable for the following applications:
Standards of length (measurement reference)
Thermostat rods
Laser components
Tanks and piping for the storage and transportation of liquefied gasses
Designations
W.NR 1.3912
UNS K93600
UNS K93601
AWS 090
Specifications
–
Chemical Composition
The chemical composition of Nilo® 36 is indicated in the table below:
| Element | Min % | Max % |
|---|---|---|
| Ni | 35.00 | 38.00 |
| Fe | bal | |
| C | – | 0.10 |
| Mn | – | 0.60 |
| P | – | 0.025 |
| S | – | 0.03 |
| Si | – | 0.35 |
| Cr | – | 0.50 |
| Mo | – | 0.50 |
| Co | – | 1.00 |
Alloy Details
Nilo® 36 density, melting point, inflection point, thermal conductivity, and coefficient of expansion is indicated in the table below:
| Density | Melting Point | Inflection Point | Thermal Conductivity | Coefficient of Expansion |
|---|---|---|---|---|
| 8.11 g/cm³ | 1430 °C | 220 °C | 10.0 W/m• °C | 1.5 µm/m °C (20 – 100 °C) 2.6 µm/m °C (20 – 200 °C) |
| 0.293 lb/in³ | 2610 °F | 430 °F | 69.3 btu•in/ft2•h °F | 0.83 x 10-6 in/in °F (70 – 212 °F) 1.4 x 10-6 in/in °F (70 – 392 °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.
The typical heat treatment of Nilo® 36:
| Type | Temperature | Time | Cooling | |
|---|---|---|---|---|
| Anneal | 850 – 1000 °C (1560 – 1830 °F) | 0.5 Hr | Air or water | |
| For highest dimensional stability | 830 °C (1525 °F) 300 °C (570 °F) 100 °C (212 °F) | 0.5 Hr 1 Hr 48 Hr | Water Water Air |
Properties
The typical mechanical properties of Nilo® 36:
| Annealed | ||
|---|---|---|
| Approx. tensile strength | <600 N/mm² | <87 ksi |
| Approx. operating temperature | up to +500 °C | up to +930 °F |
| Hard Drawn | ||
|---|---|---|
| Approx. tensile strength | 700 – 900 N/mm² | 102 – 131 ksi |
| Approx. operating temperature | up to +500 °C | up to +930 °F |
The above tensile strength ranges are typical. If you require different please ask.
*Trade name of Special Metals Group of Companies
