FE8455 Super Invar 32-5 Bar Annealed

Super Invar 32-5 Bar Annealed Description

Super Invar 32-5 Bar Annealed is a highly specialised nickel-iron alloy designed to deliver an exceptionally low coefficient of thermal expansion, making it an ideal choice for precision engineering and temperature-sensitive applications. Its annealed state helps eliminate internal stresses, providing enhanced dimensional stability and superior machinability. With customised dimensions available, it meets the exact requirements of various industries seeking consistent performance and tight tolerances.

This alloy is frequently used in optical instruments, aerospace components, and scientific measurement devices where minimal thermal distortion is paramount. Each Super Invar 32-5 Bar is produced under rigorous quality standards to ensure reliable, repeatable results and long-term durability. Whether used in research laboratories or specialised manufacturing settings, this highly refined material offers dependable performance and peace of mind for demanding applications.

Super Invar 32-5 Bar Annealed Applications

Super Invar 32-5 Bar Annealed is a specialised low thermal expansion alloy that is ideal for high-precision applications. With a unique composition featuring iron, nickel, and cobalt, it offers excellent dimensional stability across a range of temperatures. This alloy helps maintain critical tolerances and repeatable measurements, making it indispensable for aerospace, optical, and scientific equipment requiring minimal expansion under changing thermal conditions.

1. Precision Instrumentation

·         Laser-Based Interferometers: Utilised for accurate distance and motion measurements where minimal expansion is necessary

·         Metrology Gauges: Ensures reliable dimensional assessments in high-accuracy measurement systems

2. Aerospace 

·         Satellite Structural Components: Helps maintain alignment for sensitive equipment over wide temperature ranges

·         Missile Guidance Systems: Provides stable frames for critical targeting and navigation devices

3. Optical and Scientific Equipment

·         Telescope Frames: Maintains focus precision and image stability by reducing thermal-induced distortion

·         Spectrometer Platforms: Ensures consistent readings and high-resolution data collection under temperature fluctuations

Super Invar 32-5 Bar Annealed Packaging

Super Invar 32-5 Bars (Annealed) are packaged using protective materials to minimise corrosion and mechanical damage. Each bar is wrapped with rust-inhibiting paper and vacuum-sealed to mitigate oxidation. Foam or corrugated reinforcement adds cushioning, while a robust outer box ensures secure shipping. Customised labelling, specialised coatings, and tailored packaging sizes can be arranged to meet unique application demands, ensuring the bars arrive in optimal condition for your specific needs.

Packaging: Vacuum sealed, Wooden Box, or Customised.

Super Invar 32-5 Bar Annealed FAQs

Q1: What are the key material properties of Super Invar 32-5 Bar Annealed?

A1: Super Invar 32-5 Bar Annealed is an iron-nickel-cobalt alloy featuring an extremely low coefficient of thermal expansion, typically below 1.0 µm/m-°C at room temperature. It offers impressive dimensional stability under temperature fluctuations and remains highly ductile after annealing. With a nominal composition of approximately 32% nickel and 5% cobalt, it provides enhanced strength compared to standard Invar. Its high Curie temperature and robust corrosion resistance make it ideal for precision instrumentation applications.

Q2: How can Super Invar 32-5 Bar Annealed be processed or fabricated?

A2: Super Invar 32-5 Bar Annealed can be machined using conventional tooling, but feeds and speeds may need adjustment to account for its low thermal conductivity. It can be forged or hot worked within a recommended temperature range of 900–1 150°C, followed by controlled cooling to reduce residual stresses. Welding is feasible using suitable fillers and inert gas shielding. Post-processing annealing ensures optimal dimensional stability and relieves any stresses induced by fabrication.

Q3: Which quality standards and certifications apply to Super Invar 32-5 Bar Annealed?

A3: Super Invar 32-5 Bar Annealed typically meets or exceeds recognised industry requirements such as ASTM F1684, which specifies chemical composition and mechanical properties for nickel-iron controlled expansion alloys. Manufacturers often adhere to ISO 9001 or AS9100 quality management systems, ensuring consistent production practices and traceable lot documentation. Additional testing like ultrasonic inspection may be performed to confirm internal soundness. Compliance with customer-specific standards or third-party certifications may also be available upon request.

Related Information

1. Material Properties and Advantages

Super Invar 32-5 Bar Annealed is renowned for its exceptionally low coefficient of thermal expansion, making it a preferred choice for precision instruments and metrology devices. This critical attribute helps maintain dimensional accuracy in situations where temperature fluctuations are common, and the customised dimensions of the bar ensure that Grade Invar 32-5 fits seamlessly into complex designs across various engineering applications.

Due to its robust composition, this bar possesses excellent stability under both mechanical and thermal stress conditions. By employing advanced annealing techniques, its crystalline structure is optimised to mitigate internal stresses, thus providing consistent performance in demanding environments. In addition, the annealed finish of the customised bar enhances its machinability and makes it more resistant to warping, delivering reliable results for specialists who require precise tolerances.

2. Applications in Advanced Industries

Extensive use of Super Invar 32-5 Bar Annealed is found in aerospace systems, optical measurement equipment, and highly sensitive electronic assemblies. Its controlled expansion properties ensure minimal dimensional deviations, a quality that is highly sought after in satellite components and specialised optical fixtures. In these fields, even tiny changes in length or shape can significantly affect the performance of the entire system, making this bar an indispensable choice.

The medical sector also benefits from the stability of Grade Invar 32-5 in customised bar form. Complex imaging devices, surgical instrumentation, and laboratory tools often demand materials that can maintain precise geometry over a range of operating conditions. The consistent behaviour of this annealed bar caters to these stringent requirements, aiding in the development of accurate diagnostic devices and assisting in delicate procedures where tolerance is critical.