Aerospace Alloy Steels
Aerospace Alloy Steels for High-Strength Structural & Power Transmission Applications
Aerospace alloy steels are specifically designed to offer superior strength, toughness, and fatigue properties to aircraft parts under high operating stresses. By incorporating specific amounts of alloying elements like nickel, chromium, and molybdenum, the mechanical properties of the alloy steel exceed those of the ordinary carbon steel. The outcome is a group of steels with the capability to withstand extreme stresses, fatigue, and other extreme environments present within the aircraft.
In the defense industry, alloy steels are generally used to make aircraft landing gear parts, power transmission systems, gears, bearings, aircraft fittings, and other essential hardware. All of the aircraft hardware is required to withstand extreme stresses while maintaining shape stability with a high fatigue life. The importance of alloy steel is undeniable to aircraft construction.
Aerospace Alloy Steel Product Forms We Supply
Alloy Steel Round Bar diameters range from 0.125″ to 14.00″ diameter.
Alloy Steel Flat Bar comes in a variety of thicknesses and widths. For more information please request a quote.
Plate Thickness ranges from 0.1875″ to 6.50″ Thick.
Sheet Thicknesses range from 0.002″ to .150″ Thick.
ALLOY STEEL GRADES
SAE 4000'S
The SAE 4000 series includes nickel-chromium-molybdenum alloy steels widely used in aerospace structures and mechanical components. These steels are known for their excellent combination of strength, toughness, and fatigue resistance after heat treatment.
They are commonly used for aircraft structural parts, landing gear hardware, shafts, and high-strength fasteners.
SAE OTHERS
Beyond the 4000 series, several additional alloy steels are widely used in aerospace applications where specific mechanical or carburizing characteristics are required. These grades are commonly selected for aircraft transmission systems, gears, and high-strength mechanical components.
Many of these alloys provide excellent hardenability and wear resistance, making them suitable for demanding aerospace power transmission environments.
SPECIALIZED
Specialized alloy steels are developed for demanding aerospace applications requiring extremely high strength, superior toughness, or enhanced fatigue performance. Many of these materials are used in landing gear systems, high-stress structural components, turbine engine bearings, and advanced aerospace hardware.
These alloys are often vacuum-melted or processed using advanced metallurgy techniques to ensure exceptional mechanical performance and reliability in critical aerospace environments.
Certified to AMS, MIL, and OEM Specifications
Aerospace programs require strict compliance with internationally recognized material standards and manufacturer specifications. Fighter Jet Metals supplies alloy steels certified to AMS, MIL, and major OEM aerospace specifications, ensuring the material meets the mechanical, chemical, and traceability requirements required for aerospace and defense applications.
Materials can be supplied to specifications used by leading aerospace manufacturers including Boeing, Bell Helicopter, Pratt & Whitney, GE Aerospace, Gulfstream, and Northrop Grumman. All materials are delivered with full mill test reports, lot traceability, and documentation supporting aerospace quality assurance requirements.