Nilo 42• • Trade name of Special Metals Group of Companies
W.NR 1.3917
UNS K94100
AWS 091
UNS K94100
AWS 091
A Nickel-Iron, low expansion alloy containing 42% Nickel.
It has a
low and nominally constant coefficient of thermal expansion
from room
temperature to about 300°C (570°F).
Applications include:
- Semiconductor Lead Frames
- Thermostat Rods
- Various Glass to Metal Seals
| Approximate Chemical Composition | |
| Ni | 42% |
| Fe | BAL |
| DENSITY | 8.11 g/cm3 | 0.293 lb/in3 |
| MELTING POINT | 1435oC | 2615oF |
| INFLECTION POINT | 370°C | 700°F |
| THERMAL CONDUCTIVITY | 10.5 W/m•°C | 72.8 btu•in/ft2•h°F |
| COEFFICIENT OF EXPANSION | 5.3 µm/m °C ( 20 - 100°C) 4.5-6.5 µm/m °C |
2.9 x 10-6 in/in
°F ( 70 - 212°F) 2.5-3.6 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) |
| CONDITION |
APPROX TENSILE STRENGTH |
APPROX SERVICE TEMPERATURE |
||||
| Annealed | 450-550 N/mm2 | 65-80 ksi | up to 300oC | up to 570oF | ||
| Hard Drawn | 700-900 N/mm2 | 102-131 ksi | up to 300oC | up to 570oF | ||
| STANDARDS |
| ASTM F30 |
