Aerospace engineering requires attention to all details, including springs. These devices are critical for mechanical movement and shock absorption. Correct spring selection affects an aircraft's function. Consider a situation involving damping springs in a plane's landing gear. The correct spring choice helps absorb landing shock, protecting the equipment and extending its life. In contrast, poorly chosen springs may lead to harmful vibrations when the plane lands. Selecting a suitable spring is a process that considers factors like material, load resistance, and environmental conditions. In this article, we will provide strategies to control these variables effectively and guide you in designing and choosing the most appropriate springs for your aerospace projects. The most suitable spring relies on its specific use within the aircraft.

Material Considerations for High-Stress and Extreme Conditions

The selection of spring materials in the aerospace industry is often based on their ability to endure harsh conditions and high levels of stress. Stainless steel is a common choice due to its proven performance under high pressure and its ability to maintain structural integrity across a broad range of temperatures. These characteristics make stainless steel suitable for a variety of aerospace applications.

In applications where higher material performance is required, alloys such as Inconel X-750, A-286, and MP35N are typically chosen. Despite the complexities involved in their processing, these materials perform well in high-temperature environments and offer significant resistance to corrosion. If the application involves a high-temperature environment, Inconel X-750 is often chosen for its superior heat tolerance.

Additional factors influencing material selection include tensile strength, suitability for extreme temperatures, fatigue life under repetitive loads, and resistance to stress relaxation. If a spring experiences high salt concentrations, like in a marine environment, or has minimal exposure to oxygen over extended periods of time, as in space applications, other materials such as Elgiloy or various actinium-grade alloys may be suitable. These materials offer not only resistance to corrosion but also strength and durability, which are required in these challenging conditions.

Addressing Challenges - Weight Reduction, Space Constraints, and Durability

The design of spring components for aerospace applications requires the resolution of challenges, namely weight reduction, space optimization, and durability assurance.

Reducing weight in spring components requires a balance between the choice of material and functional requirements. Aerospace applications frequently involve extreme temperatures, thus requiring materials that are durable and temperature-resistant. Yet, these materials are often heavy. To counter this, lighter metals or designs involving hollow materials may be used. Titanium alloys are an example of such a solution, as they are characterized by their reduced density, along with their high strength and temperature resistance, making them a common choice in aircraft manufacturing.

Space limitations within an aircraft necessitate optimal use of the available area. Custom spring designs could be the solution. Advances in machining technology permit the production of springs with shapes such as conical or barrel. These designs help to ensure the most efficient use of space while not compromising the spring's mechanical functionality.

A durable spring is one that can perform consistently under quick changes in temperature, pressure, and vibration. The selection of material and design decisions significantly impact the lifespan of a spring. Inconel alloy springs offer an example as they are utilized in aero-engine applications due to their resistance to high-temperature and corrosion. Moreover, executing routine tests and thorough maintenance are crucial activities to keep the springs' functionality over time.

Spring Selection - Finding a Vendor and Choosing a Spring

The process of selecting an appropriate spring for an aerospace application involves identifying a compatible vendor with experience in the aerospace industry. The vendor should possess necessary certifications pertinent to aerospace materials and robust quality assurance methods.

The selection of the right spring factors in the specific application requirements, adherence to industry standards, and the full cost, which includes upkeep and replacement during the spring's operational period. While the initial cost is a factor, a lower upfront expenditure may result in higher maintenance costs and increased operational downtime. For example, opting for a less expensive, inferior-quality spring could necessitate frequent replacements, subsequently raising the total cost and disrupting the regular operation.

Early communication with your prospective vendor in regard to the specifics of your application is advisable. This interaction can result in useful inputs and uncover options not considered during the design phase. In cases where the application will experience significant temperature variations, the vendor may advise the use of an Inconel spring. These springs are recognized for their stability in the face of temperature fluctuations, so they retain mechanical properties and uphold a steady performance across operating conditions.

CoilsDB offers a wide range of springs for aerospace applications. Check out our spring calculator to find both shelf and custom options.


To wrap up the discussion, designing and selecting appropriate springs for aerospace applications involves numerous factors such as material choice, weight and size considerations, durability, and working with a trusted manufacturer. While this process is detailed, it can be accomplished through thorough research and careful planning. This approach will guarantee the accurate integration of springs into your aerospace applications and could provide extra benefits such as cost and weight reduction.