Nilo 52 was designed for use with a variety of soft glasses. It is known for its almost constant coefficient of thermal expansion up to approx. 565oC (1050oF).
Nilo® 52 is also known as Invar 52, Pernifer 50, and Glass Sealing 52.
| Element | Min % | Max % |
| Ni | 50.50 nominal | |
| Fe | bal | |
| Mn | – | 0.60 |
| Si | – | 0.30 |
| C | – | 0.05 |
| Cr | – | 0.25 |
| P | – | 0.025 |
| S | – | 0.03 |
| Al | – | 0.10 |
Density
8.3 g/cm³ | 0.300 lb/in³
Melting Point
1450°C | 2640°F
Coefficient of Expansion
500°C | 930°F
Modulus of Rigidity
17 W/m•°C | 118 btu•in/ft2•h°F
Modulus of Elasticity
10.3 µm/m °C (20 – 100°C) | 5.7 x 10-6 in/in °F (70 – 212°F)
Heat Treatment of Finished Parts
| Type | Temperature | Time (Hr) | Cooling | |
| °C | °F | |||
| Anneal | 850 – 1000 | 1560 – 1830 | 0.5 | Air or water |
Properties
| Condition | Approx. tensile strength | Approx. operating temperature | ||
| N/mm² | ksi | °C | °F | |
| Annealed | 450 – 550 | 65 – 80 | up to +450 | up to +840 |
| Hard Drawn | 700 – 900 | 102 – 131 | up to +450 | up to +840 |