Nilo 42
Products
Special Steels Division
Wire Division
Nilo 42 - Low Expansion Alloy
Nilo 42 is a nickel-iron alloy known for its extremely low coefficient of thermal expansion (CTE), making it ideal for applications where dimensional stability over a wide temperature range is critical. This alloy primarily consists of 42% nickel, with iron as the balance, and it offers excellent thermal stability, corrosion resistance, and good mechanical properties. Its low expansion rate makes it particularly useful in the manufacturing of precision instruments, optical components, and electronic devices, where precise dimensional control is essential.
Nilo 42 is commonly used in the aerospace, electronics, and optical industries, as well as in applications that require tight tolerances and high stability when exposed to temperature fluctuations.
Features of Nilo 42:
- Extremely Low Coefficient of Thermal Expansion (CTE): Maintains dimensional stability over a wide range of temperatures, typically up to 200°C (392°F).
- Excellent Machinability and Fabricability: Easy to work with in terms of machining, welding, and forming into complex shapes.
- Good Corrosion Resistance: Provides resistance to a variety of corrosive environments, particularly at elevated temperatures.
- High Strength: Maintains good strength and toughness even at elevated temperatures.
- Good Electrical and Thermal Conductivity: Useful in applications where electrical and thermal conductivity is important.
- Stability: Offers minimal thermal expansion, making it ideal for precision instruments that need to maintain exact dimensional tolerances.
Specifications:
- ASTM F15, UNS K93600
- AMS 4683, AMS 4684
- MIL-I-23010
- DIN 17741
COMPOSITION OF Nilo 36:
Element | Percentage |
---|---|
Nickel (Ni) | 42% |
Iron (Fe) | Balance |
Manganese (Mn) | 0.30% Max |
Silicon (Si) | 0.50% Max |
Carbon (C) | 0.10% Max |
Chromium (Cr) | 0.50% Max |
Copper (Cu) | 0.30% Max |
Sulphur (S) | 0.015% Max |
Phosphorus (P) | 0.015% Max |
Physical Properties:
Property | Value |
---|---|
Density | 8.30 g/cm³ |
Melting Point | 1410-1450°C (2570-2642°F) |
Coefficient of Thermal Expansion (CTE) | 1.0 x 10^-5 /°C (0-100°C) |
Electrical Resistivity | 1.05 x 10^-6 Ω·m |
Thermal Conductivity | 16 W/m·K |
Hardness (BHN) | 200-250 BHN |
Tensile Strength | 550 MPa |
Yield Strength | 220 MPa |
Elongation | 25% |