Invar 36 Wires

Invar 36 is a high-performance alloy that is known for its low coefficient of thermal expansion. This makes it suitable for use in accuracy applications where the dimensions of the component are very sensitive. Invar 36 wire is made of iron (approx. 64%) and nickel (approx. 36%). It does not expand or contract from its size as temperatures increase or decrease, thus its importance in aerospace, electronics and metrology manufacturing.

Chemical Composition of Invar 36 Wires

Understanding the properties and performance of Invar 36 wire requires an understanding of the composition of the Invar 36 wire.

Therefore, this table offers some chemical composition of these wire and their properties, as well as their suitability.

Mechanical Properties of Invar 36 Wires

The table gives engineers and manufacturers the information needed to assess the integrity and durability of Invar 36 wire in demanding environments.

Therefore, this important data on the strength, flexibility and resilience of Invar 36 wire is essential to reliability and longevity.

Features of Invar 36 Wires

Here are some key features of Invar 36 wire that make it unique and suitable for various industrial applications:

• Low Coefficient of Thermal Expansion (CTE): Invar 36 has one of the lowest CTE of all steels and is therefore useful where dimensional stability across a broad temperature range is required.
• High Strength and Durability: Invar 36 has relatively high mechanical properties so it can hold its shape and form under pressure or any form of stress.
• Magnetic Properties: It is a ferromagnetic material that retains its magnetic properties, making it useful in magnetic applications.
• Corrosion Resistance: Invar 36 offers good resistance to oxidation and corrosion, especially in environments where rust and other forms of wear are a concern.
• Excellent Formability and Weldability: The alloy can be easily drawn into wire and weldable, making it versatile for various manufacturing processes.
• Thermal Stability: It retains its properties across various temperatures, from cryogenic to high temperatures, making it suitable for temperature-sensitive applications.
• Composition: Invar 36 typically  nickel with the rest being iron. This composition is what gives the alloy its distinctive low expansion properties.

Invar 36 wire is especially valued in applications where high precision and stability over temperature fluctuations are essential.

Applications of Invar 36 Wires

Invar 36 wire is ideal for applications where dimensional stability is crucial. Some common applications include:

• Precision Instruments: Invar 36 is used in precision instruments such as clocks, watches and scientific equipment, where even the smallest expansion or contraction can affect accuracy.
• Thermal Expansion Compensation: Invar 36 is used in devices and components in aerospace, satellite systems, and high-precision optics.
• Cryogenic Systems: It is used in cryogenic environments, like liquefied gas tanks and superconducting magnets, as it maintains its structural integrity at very low temperatures.
• Metrology: Invar 36 wire is utilised in precision measurement tools, gauges, and standards, such as laser interferometers and other devices
• Aerospace: This wire is used in aerospace applications, particularly in constructing components for spacecraft, satellites, and aircraft.
• Geophysical and Surveying Equipment: It is used in instruments and equipment that measure large distances or need precise calibration, where thermal expansion could distort results.

Invar 36’s ability to remain stable under temperature variations makes it essential in a wide range of industries that require high precision and minimal thermal distortion.