This case study highlights the successful supply of Nickel Alloy 718 (Inconel 718 / UNS N07718) for a precision aerospace fastener manufacturing project in France. The client is a Tier 2 supplier in the aerospace industry, producing high-strength bolts, studs, and fastening components used in aircraft engine assemblies and structural systems.
Material Specification
Material: Inconel 718 (UNS N07718)
Product Form: Round bars (for machining fasteners)
Diameter Range: 12 mm – 80 mm
Standard: ASTM B637 / AMS 5662 / AMS 5663
Heat Treatment: Solution annealed + age hardened
Application: Aerospace fasteners (bolts, nuts, studs)
Project Requirements
The aerospace manufacturer required materials with:
Exceptional high-temperature strength (up to ~700°C)
Excellent fatigue resistance under cyclic loading
Strong oxidation and corrosion resistance
Tight dimensional tolerances for CNC machining
Full traceability and compliance with aerospace standards
Additionally, all materials needed to meet strict European aerospace quality requirements.
Material Selection – Why Inconel 718?
Inconel 718 was selected due to its superior properties:
Outstanding mechanical strength at elevated temperatures
Excellent fatigue and creep resistance
Good oxidation resistance in high-temperature environments
Stable metallurgical structure after heat treatment
Widely approved in aerospace standards (AMS series)
Compared to conventional stainless steel and titanium alloys, Alloy 718 provides a better balance of strength, durability, and processability for critical fasteners.
Manufacturing & Quality Control
Vacuum induction melting (VIM) + ESR refining for high purity
Ultrasonic testing (UT) and eddy current inspection
Strict control of grain structure and mechanical properties
Heat treatment: solution + double aging process
Full certification: EN 10204 3.1 / aerospace traceability documentation
Performance Advantages
High tensile strength and yield strength at elevated temperatures
Excellent resistance to fatigue failure in dynamic loading conditions
Reliable performance in aircraft engine and structural environments
Consistent machinability for precision fastener production
Long service life under extreme aerospace conditions
Project Outcome
The Inconel 718 round bars were successfully delivered and processed into aerospace fasteners for aircraft engine applications. The client reported:
Stable machining performance with minimal material defects
Excellent mechanical properties after heat treatment
Full compliance with aerospace quality and safety standards
The project strengthened long-term cooperation, with Alloy 718 becoming a key material for the client's high-performance fastener production.
Keywords
Inconel 718 Case Study France, Nickel Alloy 718 Aerospace Application, UNS N07718 Round Bar, Aerospace Fastener Material, High Temperature Nickel Alloy, AMS 5662 5663 Material, Aircraft Engine Fastener Alloy
