Controlled Expansion Alloys
NAS 47-6
Having the same coefficient of thermal expansion as glass and ceramic, NAS 47-6 has a composition making it easy to form an oxide film for sealing. Nippon Yakin supplies this product in coil and sheet forms.
Coil
Sheet
Designation / Standard
| Nippon Yakin Grade |
ASTM |
EN |
JIS |
| NAS 47-6 |
― |
― |
― |
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Chemical Composition
| |
C |
Si |
Mn |
P |
S |
Ni |
Cr |
Fe |
| Min |
― |
― |
― |
― |
― |
46.5 |
5.7 |
― |
| Max |
0.02 |
0.30 |
0.25 |
0.025 |
0.025 |
48.0 |
6.6 |
Balance |
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Physical Properties
| Specific heat (J/kg･K) |
145.3 |
| Specific resistivity (μΩ･cm) |
20℃ |
91 |
| Thermal conductivity (W/m･K) |
14.4 |
| Coefficient of thermal expansion (10-7/℃) |
30–400℃ |
104 |
| Young's modulus (MPa) |
160,000 |
| Curie point (℃) |
320 |
