AMS 6478 - High-Strength Aerospace Alloy Steel
AMS 6478 is a specification of an aerospace-grade high-strength, low-alloy steel. It’s tailored to make critical structural parts and landing gear, where the combination of toughness, fatigue strength, and high yield strength is important. In other words, it’s built to withstand extreme mechanical and fatigue stresses.
The alloy is made with extremely pure steel processed under vacuum, with controlled additions of nickel, chromium, and molybdenum to improve hardenability. The production methods include vacuum melting or electro slag refining to produce a clean, uniform structure with a minimum of non-metallic inclusions.
Technical Informations of AMS 6478 Steel
- Carbon (C): 0.18 – 0.23%
- Nickel (Ni): 3.25 – 3.75%
- Chromium (Cr): 1.25 – 1.55%
- Molybdenum (Mo): 0.20 – 0.40%
- Manganese (Mn): 0.30 – 0.60%
- Silicon (Si): 0.15 – 0.35%
- Vanadium (V): 0.05 – 0.10%
- Iron (Fe): Balance
- Exceptional core toughness for structural integrity under high stress
- High fatigue resistance for cyclic loading applications
- Excellent hardness and strength after heat treatment
- Reduced susceptibility to stress corrosion cracking
- Reliable mechanical performance in aerospace landing gear and airframe components
Applications of AMS 6478 Steel
Due to its combination of strength, toughness, and fatigue resistance, AMS 6478 steel is commonly used in aerospace applications where reliability and performance are critical:
- Aircraft Landing Gear Components : axles, struts, and pins
- Rotorcraft Structural Hardware : high-stress fittings and connectors
- Flight-Critical Airframe Components : load-bearing structures
- Defense Mechanical Assemblies : high-strength shafts and transmission parts
- High-Fatigue Aerospace Components : gears, spindles, and mechanical housings
Aermet 100 Alloy Steel SPECIFICATIONS
BARS & FORGINGS
Semi-finished bars and forged shapes used for aircraft structural parts, landing gear, and high-stress applications.
Certified Material for Critical Service
Materials supplied to Aermet 100 specifications comply with strict aerospace quality, traceability, and certification standards. Fighter Jet Metals provides Aermet 100 for projects requiring full documentation and inspection compliance.
All supplied materials include:
- Mill Test Reports (MTRs) confirming chemical composition and mechanical properties
- Complete heat-lot traceability for manufacturing verification
- Certification confirming compliance with applicable AMS, MIL, and OEM aerospace standards
These assurances enable engineers to specify Aermet 100 with confidence in mission-critical aerospace applications.