Description
Alloy L605/2.4964 is a cobalt-chromium-tungsten-nickel alloy with good formability, high strength up to 1500°F (816°C), and excellent oxidation resistance up to 1800°F (980°C). It also has outstanding resistance to wear, galling, and corrosion in a wide range of environments such as marine, hydrochloric and nitric acids, and wet chlorine.
Chemical Composition
The typical chemical composition of Duplex 2304 is as follows:
Mechanical Properties
Typical annealed hardness: 20 HRC
Approximate tensile strength (annealed): 900 - 1500 N/mm² (131 - 218 ksi)
Approximate tensile strength (spring temper): 1400 - 1800 N/mm² (203 - 261 ksi)
Thermal & Physical Properties
Density: 9.20 g/cm³ (0.3330 lb/in³)
Melting Range: 1410°C (2570°F) to 1438°C (2620°F)
Mean Coefficient of Thermal Expansion:
70 to 600°F: 7.61 x 10^-6 in/in/°F
70 to 1000°F: 8.31 x 10^-6 in/in/°F
70 to 1500°F: 9.08 x 10^-6 in/in/°F
Thermal Conductivity:
70°F: 88.00 BTU-in/hr/ft²/°F
800°F: 134.0 BTU-in/hr/ft²/°F
1200°F: 153.0 BTU-in/hr/ft²/°F
Other Designations
W.Nr 2.4964
UNS R30605
AMS 5796
AMS 5759
ASTM F90
ISO 15156-3 (NACE MR 0175)
Fabrication and Heat Treatment
Annealing: 2150°F (1175°C) to 2250°F (1230°C) for at least 15 minutes, followed by water quenching or air cooling
Hot Working: Forged from approximately 2150°F (1177°C). Below 1850°F (1010°C), the alloy is difficult to hot work
Cold Working: Strength levels developed primarily by cold working. Total cold work reduction generally should not exceed 40%
Stress Relieving: 400°C (750°F) to 450°C (840°F) for 2 hours, air cooled
Applications
Gas turbine engine components
High temperature ball bearings and bearing races
Springs
Heart valves
Aerospace and power generation components
Supplied Forms
Bar
Wire
Wire-Rod
Features
Outstanding high temperature strength
Excellent oxidation resistance up to 1800°F (980°C)
Exceptional resistance to wear and galling
Corrosion resistant in marine environments, acids, and body fluids
The DIN number for Alloy L605 is 2.4964.
DIN Number
The DIN number for Duplex 2304 is 1.4362.
This datasheet provides a comprehensive overview of Duplex Stainless Steel Grade 2304, highlighting its properties, applications, and advantages in various industrial settings.