AMS 5759 - L605 Cobalt Alloy Bars, Forgings & Rings
AMS 5759 defines the requirements for L605 (Haynes® 25), a cobalt-chromium-tungsten-nickel alloy known for its excellent high-temperature strength, oxidation resistance, and wear tolerance.
This specification covers bars, forgings, flash welded rings, and stock for forging used in aerospace, turbine, and high-performance industrial applications.
Product Forms & Size Range
L-605 Round Bar diameters range from 0.25″ to 7.00″ diameter.
L-605 Plate Thickness ranges from 0.1875″ to 2.50″ Thick
L-605 Sheet Thicknesses range from 0.002″ to .156″ Thick.
Overview of L605 per AMS 5759
L605, as defined by AMS 5759, has shown superior performance when subjected to temperatures above 1500°F (816°C), retaining its mechanical strength and surface stability while under constant thermal stress. Its high resistance to oxidation and sulfidation makes it suitable for use in gas turbine engines and hardware for use in furnaces.
Chemical Composition (Nominal): 52% Cobalt, 20% Chromium, 10% Nickel, 15% Tungsten
Key Properties:
- High tensile and creep strength at elevated temperatures
- Exceptional oxidation and corrosion resistance up to 2000°F (1093°C)
- Excellent resistance to wear, galling, and sulfidation
- Good formability and weldability
- Retains ductility after long-term exposure
Applications of Cobalt Alloy L605
- Aircraft gas turbine engines
- Combustion liners and turbine vanes
- Industrial furnace components (muffles, kiln liners, heat shields)
- Marine turbines and exhaust systems
- Medical devices and precision springs in extreme environments
Related Specifications
SHEET & PLATE
Sheets and plates for high-temperature aerospace and industrial applications.
Certified Material for Critical Service
All L605 material supplied by Fighter Jet Metals is:
- Certified to AMS 5537, AMS 5759, and ASTM F90 standards
- Supplied with Material Test Reports (MTRs) for full heat traceability
- Produced under AS9100 and ISO 9001 quality management systems
- Suitable for aerospace, defense, and industrial turbine applications
These certifications ensure consistent metallurgical integrity and dependable high-temperature performance.