Haynes 25 (L-605) / UNS R30605 / 2.4964 / CoCr20W15Ni

Carpenter L-605 (AMS 5536) – Cobalt-Based Superalloy

Material Overview

Carpenter L-605 is a wrought cobalt-chromium-tungsten-nickel superalloy designed for extreme service conditions requiring:
✔ Outstanding high-temperature strength
✔ Excellent oxidation resistance
✔ Good fabrication characteristics
✔ Superior sulfidation resistance

Chemical Composition (ASTM F90)

Key Properties

Mechanical Properties (Room Temp):

• Tensile Strength: 950-1200 MPa

• Yield Strength (0.2% offset): 450-600 MPa

• Elongation: 30-50%

• Hardness: 200-250 HB

High-Temperature Performance:

• Operating range: -425°F to 2100°F (-254°C to 1149°C)

• Retains 90% of RT strength at 1000°F (538°C)

• Excellent creep resistance

Physical Properties:

• Density: 9.13 g/cm³

• Melting Range: 2410-2490°F (1320-1365°C)

• Thermal Conductivity: 9.1 W/m·K (at 212°F)

Special Characteristics

1. Corrosion Resistance:

   • Outstanding oxidation resistance to 2000°F (1093°C)

   • Resists sulfidizing environments

   • Good carburization resistance

2. Fabrication:

   • Excellent cold forming characteristics

   • Good machinability (70% relative to 1112 steel)

   • Weldable by all conventional methods

Typical Applications

Aerospace:

• Turbine engine components

• Combustion chambers

• Afterburner parts

Medical:

• Implantable devices

• Surgical instruments

Industrial:

• Gas turbine components

• Heat treating fixtures

• Chemical processing equipment

Technical Standards

• AMS 5536

• ASTM F90

• UNS R30605

• ISO 5832-5 (Implant grade)

• EN 2.4964

Delivery Forms Carpenter L-605