Stainless Steels in Aerospace

Stainless steels are widely used in aerospace applications due to their exceptional corrosion resistance, heat tolerance, and mechanical properties, making them ideal for various critical components.

• Structural Components: Stainless steel is used in various structural elements of aircraft, including fuselage frameworks, landing gear, and engine mounts. Its high strength-to-weight ratio and durability ensure the integrity and safety of these critical components.
• Engine Components: In jet engines, stainless steel is utilized for turbine blades, exhaust systems, and heat exchangers. Its ability to withstand extreme temperatures (up to 800°C or 1472°F) and resist thermal expansion makes it suitable for high-performance applications.
• Fasteners and Actuators: Stainless steel fasteners, screws, and actuators are essential for the assembly and operation of various aircraft systems. These components must maintain functionality under varying loads and environmental corrosion resistance and mechanical strength.
• Corrosion Resistant Parts: Stainless steel’s natural resistance to corrosion is crucial in aerospace, where components are exposed to moisture, chemicals, and varying atmospheric conditions. This property helps extend the service life of parts like fuel tanks, battery boxes, and hydraulic systems.
• High Temperature Applications: Certain grades of stainless steel, such as SS 321 and SS 316, are specifically designed to withstand high temperatures and resist oxidation. These grades are commonly used in exhaust manifolds, jet engine parts, and other components that operate in extreme thermal environments.

Advantages of Using Stainless Steel in Aerospace

• Durability: Stainless steel’s strength and resistance to wear and fatigue make it a reliable choice for critical aerospace applications.
• Corrosion Resistance: The ability to resist oxidation and corrosion ensures that components remain functional and safe over time, reducing maintenance costs.
• Versatility: Stainless steel can be used in a wide range of applications, from simple fasteners to complex engine components, making it a versatile material in aerospace manufacturing.
• Cockpit Fasteners: Stainless steel is also utilized in the manufacturing of cockpit fasteners for aircraft. They primarily play the role of securing this area to avoid situations such as a change in air pressure. Meanwhile, stainless steel fasteners are used to bolt together the many knobs and controls that are found in a cockpit. This prevents instances of loose objects that may cause a disturbance to the aircraft flight pattern. The fasteners prevent the monitor, switches, knobs, and levers from separating from the main flight deck as it’s being operated by members of the flight crew.

Common Aerospace Stainless Steels: A286, 15-5PH, 17-4PH, 300 and 400 Series