Cobalt alloy Alloy L-605 – properties, applications and technical data
Alloy L-605 is a cobalt-based superalloy known for its excellent high-temperature strength, good oxidation resistance and very good resistance to wear and galling.
The material maintains its mechanical properties at elevated temperatures and is commonly used in demanding environments where both heat and mechanical load are present.
The alloy is primarily strengthened by solid solution hardening and work hardening rather than heat treatment.
Properties of Alloy L-605
Alloy L-605 belongs to the family of cobalt-chromium-tungsten alloys and offers a strong combination of high-temperature performance, corrosion resistance and mechanical strength.
The material is widely used in applications where components must withstand thermal stress, oxidation and aggressive environments over long periods of time.
- Type: cobalt-based high-temperature alloy
- Alloy: Co-Cr-W-Ni
- Structure: solid solution strengthened cobalt alloy
- Designations: Alloy L-605, Haynes 25, UNS R30605, AMS 5537, Alacrite, Cobalt L-605
- Typical composition: Co ~balance, Cr ~20%, W ~15%, Ni ~10%
Advantages
- Excellent strength at high temperatures
- Very good oxidation resistance
- High resistance to wear and galling
- Good corrosion resistance in aggressive environments
- Maintains performance under continuous thermal exposure
Limitations
- Higher cost compared to standard alloys
- Work hardens quickly, making machining more demanding
- Not primarily designed for maximum ductility at room temperature
Common product forms for Alloy L-605
- Sheets and plates
- Round bar
- Wire and strip
- Forgings
- Custom dimensions according to drawing
Typical components manufactured in Alloy L-605
- Gas turbine components
- Combustion chambers and afterburners
- Bearings and springs for high-temperature use
- Medical implants such as heart valves
- Components in chemical processing equipment
Corrosion and wear resistance
Alloy L-605 offers very good resistance to oxidation and hot corrosion, particularly in high-temperature environments.
The alloy also shows high resistance to acids and aggressive media, which makes it suitable for use in chemical and marine environments.
Environments where Alloy L-605 works well
- Aerospace and gas turbine applications
- High temperature industrial processes
- Chemical processing environments
- Medical applications requiring corrosion resistance
Environments to avoid
- Applications where low cost materials are sufficient
- Situations requiring very high room temperature ductility
Technical data
| Yield strength (0.2%) |
~450–800 MPa |
| Tensile strength |
~900–1100 MPa |
| Hardness |
~25–45 HRC |
| Density |
~9.2 g/cm³ |
| Modulus of elasticity |
~220 GPa |
| Temperature resistance |
Up to ~1000 °C depending on application |
With a global network of suppliers, we can offer Alloy L-605 in technical dimensions for demanding industrial applications.
Contact us for technical advice or a quote.
Supplier of Alloy L-605 with certified quality
HARALD PIHL is one of Europe's largest suppliers of special alloys, including high-performance cobalt-based alloys such as Alloy L-605.
With over 100 years of experience in the metal industry, we deliver materials with full traceability and certification according to EN 10204 3.1 / 3.2 as well as relevant ASTM and ISO standards.
Cutting, testing and quality assurance are carried out in-house to ensure the right tolerances and fast global delivery for technically demanding projects.
- Europe's largest stock of nickel and titanium alloys
- Special alloys from stock
- ASTM / ISO standards
- Top quality for safety-critical applications
- Fast global delivery
- Full material certification (EN 10204 3.1 / 3.2)
- Over 100 years in the metal industry
- Nickel and titanium experts
