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Stainless Steel - Grade L605/2.4964

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:

Element Min % Max %
Carbon (C) 0.05 0.15
Manganese (Mn) 1.00 2.00
Phosphorus (P) -- 0.04
Sulfur (S) -- 0.03
Silicon (Si) -- 0.40
Chromium (Cr) 19.00 21.00
Nickel (Ni) 9.00 11.00
Tungsten (W) 14.00 16.00
Carbon monoxide (Co) Balance -
Iron (Fe) -- 3.00

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.