Precision 3J53 Alloy / Invar 36 Alloy with Low Thermal Expansion

Product Specification

3J53 Alloy (Invar 36) Offers Extremely Low Thermal Expansion, Ideal For Precision Applications.

3J53 Alloy (Invar 36) Product Description

Overview: 3J53 Alloy, commonly known as Invar 36, is a high-performance nickel-iron alloy with a nominal composition of 36% nickel and the balance iron. It is specifically engineered to offer extremely low thermal expansion and high dimensional stability over a wide temperature range.

Composition:

• Nickel (Ni): 36%
• Iron (Fe): Balance
• Trace elements: Typically includes small amounts of carbon, manganese, silicon, and other elements depending on the specific manufacturing process.

Key Properties:

• Thermal Expansion: Exhibits an exceptionally low coefficient of thermal expansion (CTE), approximately 1.2 × 10⁻⁶ /°C (1.2 µm/m/°C) at room temperature. This property minimizes changes in dimensions with temperature fluctuations, making it ideal for applications requiring high dimensional stability.
• Mechanical Strength: Demonstrates good tensile strength and hardness, although it is not as strong as some other alloys. It is generally sufficient for applications where its low thermal expansion is the primary requirement.
• Thermal Conductivity: Moderate thermal conductivity, making it suitable for use in environments where heat transfer control is needed.
• Magnetic Properties: Exhibits low magnetic permeability, which is beneficial in applications involving magnetic fields or requiring minimal magnetic interference.

Applications:

• Precision Instruments: Widely used in scientific instruments and measurement devices where accuracy is critical, such as in telescopes, coordinate measuring machines, and precision gauges.
• Aerospace Components: Utilized in aerospace applications, including aircraft and satellite components, where thermal stability is crucial for maintaining structural integrity and performance.
• Engineering and Manufacturing: Applied in the production of high-precision mechanical components, such as molds and tools, which require consistent dimensions over varying temperatures.
• Electronics: Used in electronic devices and systems where thermal expansion could affect performance, such as in certain types of connectors and housings.

Processing and Fabrication:

• Machinability: Generally good machinability, though it may require specialized tooling and techniques to achieve desired surface finishes and tolerances.
• Weldability: Can be welded using appropriate techniques and filler materials, though care must be taken to avoid thermal stresses and distortions.

Standards and Certifications: 3J53 Alloy is often produced in accordance with industry standards such as ASTM, ISO, and other relevant specifications, ensuring consistent quality and performance across various applications.

Handling and Safety:

• Storage: Should be stored in a dry, clean environment to avoid corrosion and contamination.
• Safety Precautions: Standard safety procedures should be followed when handling and machining the alloy to ensure safe working conditions and prevent exposure to any fumes or particles generated during processing.

Summary: 3J53 Alloy (Invar 36) is a high-precision material valued for its unique property of minimal thermal expansion. Its applications span various high-tech industries where stability and accuracy are paramount. With its combination of low CTE, good machinability, and moderate strength, it remains a preferred choice for many demanding applications.