Controlled Expansion Alloys
NAS 36
Used in a wide range of applications requiring a low coefficient of thermal expansion, NAS 36 is a 36Ni-Fe alloy suitable for high-precision instruments and devices sensitive to even slight changes in dimension and shape caused by thermal expansion. Nippon Yakin supplies this product in plate, sheet and strip forms.
Coil
Sheet
Plate
Chemical Composition
NAS 36
| C | Si | Mn | P | S | Ni | Cr | Fe | |
|---|---|---|---|---|---|---|---|---|
| Min | ― | ― | ― | ― | ― | 35.0 | ― | Balance |
| Max | 0.05 | 0.30 | 0.80 | 0.010 | 0.010 | 37.0 | 0.25 |
Physical Properties
| Thermal conductivity (W/m･K) | 20℃ | 10.4 |
| Thermal expansion coefficient (×10-7/℃) | 30–100℃ | 15 |
| Young's modulus (MPa) | 142,200 | |
| Curie point (℃) | 240–260 | |
| Volume resistivity (μΩ･cm) | 20℃ | 78 |
Coefficient of Thermal Expansion
With a coefficient of thermal expansion about one-tenth of 18-8 stainless steel at room temperature, NAS 36 undergoes little thermal deformation even when subjected to temperature changes.
Coefficient of thermal expansion of NAS 36, NAS 42 (Annealed at 900℃ for 1hr in vacuum)
Mean coefficient of thermal expansion of Fe-Ni alloy
Low-temperature Ductility
Because of its austenitic structure, the impact strength does not vary, ensuring adequate ductility at room temperature and even low temperatures.
Corrosion resistance
Because NAS 36 does not have the chromium found in stainless steel, care must be taken to ensure rusting does not occur.
Applications
Bimetals, magnetic materials, measurement tools, structural members for astronomical telescopes, optical devices, molds for carbon-fiber reinforced plastic, antenna components, mask frames for flat panel displays, high-precision printing frames, tools for semiconductor inspection and manufacturing