Haynes 25 / L605

Haynes 25, also known as L605, is a cobalt-nickel-chromium-tungsten high-temperature alloy known for its excellent elevated-temperature strength, oxidation resistance, wear resistance, and good fatigue performance. It retains useful mechanical properties at high temperatures, making it suitable for critical aerospace, gas-turbine, and industrial components.

Appearance & Properties

Color: Silver-gray to bright silver-gray

Density: Approx. 9.1 g/cm³

Tensile Strength: Typically approx. 900–1,100 MPa at room temperature, depending on material condition

High-Temperature Performance: Excellent

Oxidation Resistance: Excellent

Corrosion Resistance: Good

Machinability: Difficult

Wear Resistance: Good

Fatigue Resistance: Good

Magnetism: Generally essentially non-magnetic

Surface Finishes: Blasting, polishing, grinding, PVD coating, etc.

Typical Applications

Haynes 25 / L605 is widely used in aerospace, gas turbines, energy, medical devices, and high-temperature industrial equipment.

Typical parts include aircraft-engine hot-section components, combustion-system parts, turbine seals, bearing races, springs, high-temperature fasteners, and heat-resistant precision CNC parts.

Advantages

• Excellent high-temperature strength

• Good oxidation and corrosion resistance

• Good wear and fatigue resistance

• Maintains useful mechanical stability at elevated temperatures

• Suitable for critical high-temperature, high-load components

Limitations

• Very difficult to CNC machine

• Strong tendency to work harden

• High cutting-tool wear and relatively low machining efficiency

• High material and machining costs